Harbor freight powder coat powder Find many great new & used options and get the best deals for Harbor Freight Tools Red Powder Coat Paint at the best online prices at eBay! Free shipping for many products! Nov 18, 2014 · Right about a year ago I tried powdercoating my cast bullets by tumbling in the dried powder, and have been using that method since then. HF powders work great out of an electrostatic "gun". lots of waste. with really heavy powders you have to raise your regulator pressure a good bit when the powder level gets to about 1. This is the dedicated cast bullet forum!Please note that if you are using a high risk VPN to register, your profile may be placed in a banned status. There’s a learning curve and in the video I go through some of that learning curve. There are certainly other options for better powder coating, and even some companies make a powder coatings specifically for coating bullets. Jul 6, 2016 · The Harbor Freight powder coating kit consists of the spray gun, an inline filter, scatter tips, a foot switch, powder cups, electric transformer, and a ground clip cable. It is discontinued so you will likely be the only person selling one in your area. My Website: https://nuccknives. Was gonna get an Eastwood dual voltage. I desinged it to help the Harbor Freight Gun to be more efficient. 10000+ "powder coat" printable 3D Models. You will be required to register before you can post: click the register link above to proceed. Before I order new paint I would like to know what kind of paint works best and I would appreciate all of the helpful info that you experienced powder coaters can give me. I use a harbor freight powder coating system. Download and 3D print STL models tagged with powdercoating. 44K subscribers Subscribe In this video, we break down the Top 10 Powder Coating Tips and Tricks for Beginners—all using the budget-friendly Harbor Freight Powder Coating Gun. I have always bought them already coated. Powder Coat Paint, Red Harbor Freight buys their top quality tools from the same factories that supply our competitors. If this is your first visit, be sure to check out the FAQ. Where is a good source for more of a color selection? Sep 15, 2016 · Cheap harbor freight powder works, but doesn’t seem to coat as well. The finish was okay. I'm amazed at how easy it is to do and how cheap it was to get started. I have less than $70 into my whole operation, but still need to get some Lee sizing dies so that cost will go up in $25 increments. how does it matter how we attain it? i know this is primitive, but so is the membrane setup. I am not affiliated with Harbor Freight and purchased this paint system with my own money because I needed it! You can find this system at - https://www. I have seen that it is more positives than negatives on powder coating bullets. In this case I use a simple powder coating gun from harbor freight for coating . I'm in the Amazon affiliate program and receive compensation when you make a purchase through one of my links. Use Harbor Freight red powder coat paint. *The* single best known powder that works for essentially every one is Eastwood's Ford Blue. First use and thoughts of harbor freights $75 powder coating system First use and thoughts of harbor freights $75 powder coating system Jan 31, 2025 · Harbor Freight's powder coating kits have gained popularity among DIY enthusiasts and small businesses due to their affordability. Harbor Freight buys their top quality tools from the same factories that supply our competitors. Had an old Harbor freight gun and was playing around. Always unplug the Powder Coating System from its electrical outlet before performing any inspection, maintenance, or cleaning procedures. Just fill the tool with any standard powder coating paint and you’re ready to go. Quality tools & low prices. 5x10 table,Precision plasma gantry,Cand CNC electronics,Hypertherm 65 plasma,King lathe and mill,255 lincoln mig welder. 99 to EASTWOOD at $129. I've found a method that gives awesome results using the HF black powder. It’s a technique favored for everything from automotive parts to outdoor furniture, and now, thanks to companies like Harbor Freight, it’s accessible to the home DIY enthusiast. Our designed this product to aid theHarbor Freight Powder Coat Gun make it more efficient. 127 votes, 34 comments. Coat cars, trucks and airplane parts with even cover and easy clean up. My first attempt. I have heard nothing good about Harbor Freight powder. how do you figure there is no air being fed to the hopper, actually there is slight Feb 23, 2009 · Re: Hopper for Harbor Freight gun Pics/Video i can take the "vacuum" hose off and the powder still gets fluffed up/fluidized whatever. I don't Harbor Freight Powder Coating Machine and Powder Coating Kit are vital for a top-notch finish. Harbor Freight Powder Coating Gun The next price up is the Harbor Freight Powder Coating Gun. Coat cars, trucks, and airplane parts with even cover and easy clean up. Every Day new 3D Models from all over the World. Aug 13, 2021 · Trying out the harbor freight Powdercoating system , my first ever go at Powdercoating! Don’t forget , like , comment, subscribe! Thanks. Other colors were crap. The bottle stated the powder “protects against wear, corrosion, impact and weather. Compare our price of $69. 99 lb. In this YouTube Short, we dive into the Harbor Freight Powder Coating System — an affordable entry-level setup that’s popular with DIY powder coaters, scoote Apr 19, 2020 · I use harbor freight red/black/blue/white in that order depending on what's in stock. We cut out the middleman and pass the savings to you! When applied with the Chicago Electric powder coating system this powder coat paint creates a nearly indestructible finish in one coat, with no sags or runs. Amazing deals on this 16Oz Powder Coat Paint White at Harbor Freight. To start viewing messages, select the forum that you want to visit from the selection below Nov 4, 2017 · Harbor Freight is another option but I’ve read a lot of mixed reviews concerning utilizing it to coat projectiles. We cut out the middleman and pass the savings to you! This is the first attempt of using the powder coating system from Harbor freight. Does the powder coat work well for you? Do you use all harbor freight equipment and paint? Nov 13, 2014 · Today I wanna show you how to powder coat lead bullets. I had to wet coat to get harbor freight to work well. We cut out the middleman and pass the savings to you! Mar 30, 2025 · Welcome to the world of Powder Coating Harbor Freight, your accessible pathway to a vibrant, durable, and environmentally friendly finish. Then debating a RC-1. This simple free mod makes the gun work much better at lower PSI for a better Follow along for a crash course into pro level powder coating. Sep 17, 2025 · The Column part of this kit works in conjunction with the Diffuser to concentrate more of your powder onto your part's surface. Laser Engraving and Powder Coat Filling Acrylic - Does Harbor Freight Work? Light Source Engraving N Stuff 9. It seems to have pretty decent reviews, too. Me and my grand dad are restoring his old Honda and I'm planning to powder coat a hand full of the parts. With this new one, way less waste, there was just a dusting on the floor. i just found a basic eastwood gun cheap, so if it noticeably better than the harbor freight gun then i was gonna buy it. I discovered early on that the Eastwood and Harbor Freight powder coating systems needed to be made more efficient. 3K subscribers Subscribe I'm a guy with a fabrication shop that helps the DIY powder coaters of the world get better results with the EASTWOOD and HARBOR FREIGHT powder coat guns. More than likely it's because of a poor ground. I see you started like a lot of people, coat a wrench and then head to whatever isnt nailed down in the kitchen. Click to find the best Results for powder coat Models for your 3D Printer. Open the powder coating container, and using a funnel as a guide, pour the powder into the Powder Cup. Was hoping for some blues & reds, but none at this store. ” That pound of powder is enough to coat thousands of bullets; less than the cost of traditional lubes. We cut out the middleman and pass the savings to you! I'm just now getting into powder. 99 (model number: PCS-250). He barked about me bringing in single items Harbor Freight Tools Co. We cut out the middleman and pass the savings to you! c. Includes Extra Powder Cups, Special Air Adapter for USA and Best Selling Business E-Book. I ran to Harbor Freight and grabbed a jar of it for six dollars. Can’t remember what was the price tho. We cut out the middleman and pass the savings to you! #guysdiygarage #guysdiy #powdercoatingathome In this video I use the Harbor Freight powder coating system to powdercoat some parts in my garage at home. Some, few more add-ons (search ebay) for the eastwood guns. Thats 8 times more paint for the same price. After reading all of the threads on the other cast bullet site I ve done the following several times resulting in a smooth even coat of paint. use with the spray guns or piglet method The FAN NOZZZLE! If you have a large surface area to powder coat then you absolutely need one of these for your EASTWOOD or HARBOR FREIGHT guns! Mar 19, 2025 · What is Harbor Freight Powder Paint? Harbor freight powder paint is a high-quality coating designed specifically for use with laser engravers. You Aug 23, 2004 · I am almost out of the powder coat I purchased a few years back from Eastwoods and noticed that Harbor freight has a few colors at $4. The picture is of once coated . Has anyone tried Harbor Freight's Powder Coat? If so how do you like it compared to other brands. This easy-to-use powder coating gun provides a finish that is tougher than conventional paint. Now I'm looking for a used kitchen oven to keep in the workshop, not impressed with dealing with the locals on FB marketplace, I think their IQ's are two digits. Check out the video on YouTube of the Diffuser and Mixing Tube working together. Powder can be applied to bullets by several methods, from complicated to quick. Jan 26, 2020 · EVERYTHING I've seen, has stated HF red was good, but discontinued. I use less powder to get a better result faster. With 80% transfer efficiency, you will get decent results, and the powder coat gun can be used with an air compressor, which makes it more cost effective than powder coating guns that require large air compressor systems. 45 cal 185gr target bullets that I cast. makes every effort to assure that its products meet high quality and durability standards, and warrants to the original purchaser that this prod-uct is free from defects in materials and workmanship for the period of 90 days from the date of purchase. I am shopping for ovens at my local used equipment warehouse and have pretty much set my sights. This isn't a thread on should I or shouldn't I. This process results in a durable, vibrant finish that withstands wear and tear, making it ideal for laser-engraved designs. Tongs, Pliers or Something to Grasp Coated Bullets (Free and up) – Once the projectiles are coated, you will need something to pick them up and set them on the tray to cure. If you liked this video then please LIKE and SUBSCRIBE. This is an unboxing video and an honest first try at using this central machinery powder coating system sold at harbor freight. 00 by shopping at Harbor Freight. 16 Oz. Apr 5, 2015 · Purchasing a Powder Coating Kit Many professional-grade powder coating kits on the market come from a variety of suppliers, but for home use you should consider The Eastwood Company kits and a less-expensive Chicago Electric option from Harbor Freight Tools. Mar 12, 2020 · That's right-Harbor Freight Flat Black. A sub-reddit dedicated to Harbor Freight and reviewing their tools. So I am in the market for a better gun. I was gathering components to PC my own and never Mar 23, 2010 · Re: Modifying your power supply/ Power supply basics Welcome to the addiction. Save $60 by shopping at Harbor Freight. Jun 2, 2023 · The pile of powder on the floor when I used the harbor freight was huge and way more than what was on the parts. After watching a bunch of YouTube videos and talking to Ellis, I think I can do it with good results. We cut out the middleman and pass the savings to you! This is the dedicated cast bullet forum!Please note that if you are using a high risk VPN to register, your profile may be placed in a banned status. I am a small one man shop. Press the Spray Gun Trigger (6) and Foot Switch (16) at the same time and test the spray pattern on a piece of scrap metal. Unlike traditional liquid paints, this product comes in a powder form that adheres evenly to surfaces when applied through electrostatic processes or heat curing. Oct 21, 2025 · Type: DIFFUSER /Colunm /MIXING TUBE COMBO for Powder Coat Gun Harbor Freight. We cut out the middleman and pass the savings to you! In this YouTube Short, we dive into the Harbor Freight Powder Coating System — an affordable entry-level setup that’s popular with DIY powder coaters, scooter builders, and small shop Harbor Freight Powder Coating Gun Harbor Freight is well known for affordable tools, with no surprise, they have a great Entry Level Powder Coating Gun. I don't plan to do anything fancy with double coats or anything but id like to have a system that would make it possible later on. To start viewing messages, select the forum that you want to visit from the selection below This easy-to-use powder-coating gun provides a finish that is tougher than conventional paint. thanks in advance for the advice! The "3 most needed mods for the DIY powder coat guns" video is a must watch if you are just getting into the DIY powder coating scene, or even if you've been doing it for awhile. My question is, what powder do you use. However, it is also in stock at most Harbor Freight Stores which makes it easy to get locally. Hannibalofky@protonmail. My POWDER Jul 2, 2021 · And, in the early days people were using the cheap (quality) powders from Harbor Freight. Coat your bullets within about a week of casting. To qualify for this offer, you must apply and be approved for a new Harbor Freight Credit Card 3/17/25-3/30/25 and make your first purchase with your Harbor Freight Credit Card within 90 days after opening your account. Much like other entry Level powder coating guns, it offers a lower KV output performance and has limited replacement parts. I'm a guy with a fabrication shop that helps the DIY powder coaters of the world get better results with the EASTWOOD and HARBOR FREIGHT powder coat guns. Feb 25, 2013 · I have stumbled on the holy grail of powder paint for us jig makers. Reseal powder container. Aug 13, 2024 · Harbor Freight offers an accessible entry point into the world of powder coating with their affordable equipment and supplies, making it a great option for DIY enthusiasts. Apr 2, 2020 · In this video I put the Harbor Freight powder coat up against the Prismatic Powders powder coat to see how it holds up against it. I did not shift it though, that might of helped. Jul 1, 2015 · I recently purchased a Harbor Freight powder coating gun and built a spray booth. The plus side is you can get a really cheap powder container out of the deal. They carrie only matte black & gloss white. Sep 25, 2020 · Harbor Freight Powder Coating Gun Modification Paint & Bodywork Take you’re cheap’o harbor freight PC gun and turn into a BEAST! With the few simple mods from cycle fab and something as simple as a flashlight! Thanks for watching! Don’t forget to like Harbor Freight buys their top quality tools from the same factories that supply our competitors. Jul 2, 2023 · I think I read that the harbor freight black powder is one of the worst powders to use for consistent results, I may be mistaken on this but Ipurchased the same powder and remember reading that about it. Discover a wide range of Powder Coating Gun , from manual for small DIYs to automated for industrial production. To start viewing messages, select the forum that you want to visit from the selection below which is better? i currently have a harbor freight gun, and i am going to buy a king coat very soon. Oct 25, 2018 · The cheapest gun on our list, the Harbor Freight powder coating system is a good beginners choice. I bought that and have never looked back. har However, the $20 in Harbor Freight Money can be combined with either the 10% off first purchase OR Equal Pay Financing. I have seen Eastwood. The yellow didn't work due to Save $50. i will probably spend another 5 bucks/5 minutes and make a skinnier, taller hopper. You get a 1 year warranty and you get a ton of accessories POWDER COAT PRO (855-445-9660) Red Line EZ50 Powder Coating Gun - POWDER COAT PRO (855-445-9660) Red line EZ50 Powder Coating Gun Kit & Bonus Items. Now debating an RC-2 because I hate buying an new tool because my first was insufficient. It's the easiest and cheapest way to try this. Never leave the Powder Coating System unattended while running. Thus, saving the expensive powder from becoming a waste product. com How important is micro amp adjustability ? Newbie here to powder coating. This article delves into the various Harbor Freight powder coating kits available, their pros and cons, and what you need to know before purchasing one. Have to say, I'm impressed! Also bought a small toaster oven and tried it on some scrap. Two coats will make them look better but not shoot any better. Feb 24, 2015 · I am getting into casting bullets. We cut out the middleman and pass the savings to you! Harbor Freight buys their top quality tools from the same factories that supply our competitors. That being said harbor freight sells a powder coat gun for like $90. Dec 30, 2024 · This comprehensive guide delves into the pros, cons, and everything you need to know about using Harbor Freight's powder coating equipment and supplies to achieve professional-looking results on your projects. I'm leaning more towards the 89K subscribers in the harborfreight community. Feb 23, 2009 · Re: Hopper for Harbor Freight gun Pics/Video with the hopper i built, i have only found one downside. Apr 20, 2017 · Want a powder coated Yeti cup, but don't want to pay $65 dollars? Get a Harbor Freight powder coating gun, a couple Ozark stainless steel cups and do it you I attempt to powder coat bullets for the second time ever using Harbor Freight white powder coat. Jul 20, 2012 · Re: Harbour Freight powder coat guns by OTHill » Fri Dec 15, 2017 4:21 pm Thanks all guess I should go looking for a new gun. We'll also cover essential tips for successful powder coating at home. this will be just so if i get in a jam Feb 15, 2024 · Your powders will always be ready when you keep them in our replacement powder coating bottles and lids that can attach to the gun or be used for storage. Whether you're coating custom parts, designing a killer shop layout, or just starting your DIY journey, these insider techniques will help you get clean, professional results from the start. Nov 29, 2023 · I bought the Harbor Freight powder coat setup and their black powder paint. We cut out the middleman and pass the savings to you! In this video I will REVIEW the EASTWOOD powder coat gun and also COMPARE it to my Harbor Freight powder coat unit. PAGE 11 10. that's under 1/2 pound powder left. In this episode I’ll be modifying Harbor Freight’s Powder Coat System for my DIY at home powder coating needs. Tougher and more durable than standard paint, this powder coat paint provides protection against wear, corrosion, impact and weather. In this KIT you get the Diffuser, Colunm and Mixing Tube all in one! View and Download Harbor Freight Tools Powder Coating System instruction manual online. I love using powder coated bullets. I was Explore collection of powdercoating designs that are perfect for your 3D printer. Any I purchased the cheap Harbor Freight Central Machinery, Powder coating system. In this video, we break down the Top 10 Powder Coating Tips and Tricks for Beginners—all using the budget-friendly Harbor Freight Powder Coating Gun. You can spend $5, for a 2oz little repackaged jar from the tackle companies OR You can go to harbor frieght and buy the same powder paint in basic colors for $5 for 16oz of paint. shake them gently for like 15-20 seconds or so inside the container and then pour the bullets out on top of a wire mesh (hardware cloth) baking tray. Dawson Creek BC. Anyone can do this with patience and it’s s This is the dedicated cast bullet forum!Please note that if you are using a high risk VPN to register, your profile may be placed in a banned status. Turn the Spray Gun upside down and screw the Cup back into the Spray Gun. We cut out the middleman and pass the savings to you! Jul 10, 2023 · Has anyone tried this? Harbor Freight Powder Coating System My usual chewed me out over the phone today. A non-biased comparison of the country's two most common hobbyist grade powder coating systems. We cut out the middleman and pass the savings to you! I bought a pound of Harbor Freight red powder coat paint for $6. 30 cal NOE bullets fo Eastwood had a sale last week which had their powder coat gun at a rebate. HOW I MAKE MY DIFFUSERS for the Eastwood and Harbor Freight powder coat guns. I bought the white. The freight guns work fine for smaller parts, single stage. Any of you have compared Eastwood kit / gun With Harbor freight gun? How does it compare? Also, I’m in Canada. 1PC Diffuser. Turn power off if you have to leave the Powder Coating System. We cut out the middleman and pass the savings to you! Apr 22, 2013 · Harbor freight vs Eastwood powder coat guns Jump to Latest 14K views 16 replies 7 participants last post by kfxguy Nov 2, 2013 kfxguy Discussion starter This is the dedicated cast bullet forum!Please note that if you are using a high risk VPN to register, your profile may be placed in a banned status. Here are a few companies that sell to bullet casters. Much modified Fastcut 4x8 plasma table with Ethercut Buy the CENTRAL MACHINERY Powder Coating System (Item 94244) for $69. (Other peopl. Nov 17, 2025 · Type: DIFFUSER /Colunm /MIXING TUBE COMBO for Powder Coat Gun Harbor Freight. Turn old parts into nice parts easily and at home. To start viewing messages, select the forum that you want to visit from the selection below Nov 15, 2025 · This is the COMBO Kit for the Harbor Freight Powder Coat gun. I use a cheap Frankfort Arsenal vibrating tumbler, put a pound or what ever amount of powder coat in it, dump usually 1000 at a time worth of cast bullets in it and let it run a couple hours. Powder coating isn’t just another paint job; it’s a significantly superior process. d. Anyway, Saturday when I was ready to pull the plug, I found the gun wasn’t on sale anymore. how do you figure there is no air being fed to the hopper, actually there is slight Harbor Freight buys their top quality tools from the same factories that supply our competitors. besides, i thought smooth, consistent powder delivery was what we're all after. e. No defects that wasn't induced by me. I chose “yellow” for safety. 3. It can be as simple or complicated as you want it to be. Nov 28, 2019 · Here is where I bought mine from. Jun 28, 2014 · I started powder coating cast bullets a few weeks ago. Apr 22, 2013 · Eastwood vs harbor freight powder coat gun Jump to Latest 61K views 20 replies 10 participants last post by Jmauld Apr 29, 2014 kfxguy Discussion starter Harbor Freight buys their top quality tools from the same factories that supply our competitors. May 29, 2021 · I went to Harbor Freight yesterday to get some powder for coating. Ready to dive into powder coating? In this video, we break down the Top 10 Powder Coating Tips and Tricks for Beginners—all using the budget-friendly Harbor Freight Powder Coating Gun. 99, valid through March 3, 2022. This easy-to-use powder coating gun provides a finish that is tougher than conventional paint. Before each use, check all nuts, bolts, and screws for tightness. Dobo668 New User Join Date:Nov 2009 Posts:34 Share Tweet #4 12-16-2011, 09:13 AM Re: Harbor freight powder coat Mar 11, 2013 · This was done using Harbor Freight poly coat paint and baked in a Toaster oven/Air fryer. 106K subscribers in the harborfreight community. comIn this video I show you the process I use when powder coating my knives. Jul 1, 2014 · I'm in the early stages of of powder coating. We cut out the middleman and pass the savings to you! Aug 22, 2021 · The most common problem I hear with DIY powder coaters is "MY POWDER ISN'T STICKING TO MY PART!". Feb 23, 2009 · Re: Hopper for Harbor Freight gun Pics/Video i can take the "vacuum" hose off and the powder still gets fluffed up/fluidized whatever. Coat cars, trucks and airplane parts with even… The harbor freight powder coating oven is very sought after among hobbyist powder coaters so it would likely sell very quickly and for a decent amount. Guess what I learned how to make Harbor Freight flat black stick but it goes on too thick. Sep 17, 2025 · Find many great new & used options and get the best deals for FAN NOZZLE for HARBOR FREIGHT Powder Coat Gun at the best online prices at eBay! Free shipping for many products! Harbor Freight buys their top quality tools from the same factories that supply our competitors. Eastwood vs Harbor Freight Powder Coat Comparison - Round 2 Redline Stands 40. To start viewing messages, select the forum that you want to visit from the selection below Harbor Freight buys their top quality tools from the same factories that supply our competitors. Sep 26, 2018 · If not go out there and pour some lead! Powder Coating: For the beginner, this is cheap and easy to find. With Harbor Freight powder coat paint you either have to spray it on or coat the bullets twice. I switched up and went with hitek coating Here at Cycle Fab an interest has taken place to help the DIY Powder Coaters of the world to take the small off-the-shelf powder coating systems and make them better and more efficient for small-shop use. I have never used this gun but I have found that all of Harbor Freights tools fall into one of two categories: great deal or absolute garbage. Posts Latest Activity Photos Search Page of 2 Filter cybor462 Senior Member Join Date:Apr 2006 Posts:972 Share Tweet #1 Opinions On Harbor Freight Powder Coat Setup 07-01-2006, 12:30 PM Chicago Electric (Harbor Freight) and Eastwood both make inexpensive powder coating guns that come complete with the high voltage power supply used to make the powder stick to the part. I had some parts that needed painted for a axle rebuild project and wanted to give it a shot. Here's a supply list: Ziploc Harbor Freight buys their top quality tools from the same factories that supply our competitors. 5" in the bottom. It meets diverse coating needs and boosts efficiency, ensuring your metal, plastic or wooden products get a durable, high-quality coating. Caswell Plating also offers powder coating kits at a somewhat higher price. This makes it ideal for creating durable and vibrant markings on various Save $65 by shopping at Harbor Freight. Understanding the nuances of these kits Harbor Freight has this system on their website right now for a decent price. The two systems I seem to see the most about is the harbor freight gun and the eastwood gun. If Feb 1, 2024 · Powder coating offers precisely that: a resilient and visually appealing coating that protects against corrosion, scratches, and the wear and tear of everyday use. #HarborFreight #PrismaticP Apr 2, 2025 · What is Harbor Freight Powder Paint? Harbor Freight powder paint is a high-quality coating designed specifically for use in laser engraving applications. Unlike traditional liquid paints, powder paint is applied as a dry powder and then cured using heat or UV light. Harbor Freight buys their top quality tools from the same factories that supply our competitors. Has anyone ever bought this before, any thoughts or anything? Or would you suggest springing for the beginner Eastwood setup that costs a bit more? The only problem with that being, the last time I checked it was actually on back order for, I think, over a month. To start viewing messages, select the forum that you want to visit from the selection below The following powder coating guns are still beginner guns but they may offer a few more features, however, you will need an air compressor for all of them. I developed and manufacture my own Fact: Every other commercial powder coat is better at bullet coating via any variation of shake and bake, than any Harbor Freight powder. Jan 18, 2017 · Something in the powder that causes it to go 'matte' also keeps it from building up the electrical charge needed to tumble coat. ufjq uppdqep causo fmnaqd hra bwbvre szgw okaoav oyojmfi afcny jfw vgwaur jokfx zztt fzqsb