3 Inch Amtech Knotted Wire Cup Brush comes with a twist, used to remove tough rust, paint and corrosion. Its knotted steel wire bristles have more aggressive action, faster removal rate and increased wire life over crimped wire brushes, making it the ideal choice for heavier-duty industrial, automotive and DIY applications. This brush can be used with a majority of cordless or corded power drill and angle grinder for most deep dirt cleaning and aggressive abrasion applications. No matter if you are working with metal, masonry, or welds, this brush maximizes that performance and durability.
What’s Included
Key Features & Benefits
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Knotted Wire Bristles
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Aggressive cleaning power for heavy-duty rust and paint removal.
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Compact 3-Inch Size
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Perfect for fine work on small to medium surfaces.
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Durable Construction
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Constructed of durable hardened steel for long-term service.
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Versatile Applications
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Ideal for pre welding, painting or bonding surface preparation.
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Easy Compatibility
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Quick and easy to install on most drill and grind tools.
Application Tips
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Best results are achieved at moderate to high speeds.
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Always use safety goggles, gloves, and protective clothing.
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DO NOT USE on or near wood, aluminum or plastic.
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Keep the brush moving smoothly so you don’t dig into the work.
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Clean it after use so that you can make the brush use longer.
Product Information
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Brand: Amtech
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Type: Knotted Wire Cup Brush
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Size: 3 Inch
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Material: Tempered steel wire (knotted)
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Compatibility: Fits most drills and angle grinders
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Uses: Rust removal, stripping, weld cleanup, deburring
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Demonstration Video
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See how fast the Amtech Knotted Wire Cup Brush 3" takes down heavy rust and paint.
FAQs
1. What is the difference between a knotted wire cup brush and a crimped wire cup brush?
The knotted model is heavier and harsher and is intended for tough cleaning jobs.
2. Is this a polishing brush?
It is primarily for cleaning and rust removal, not refinishing by fine polishing.
3. Is the 3-inch size good for detail?
Yes, it can be used as it's small but efficient, good for precision cleaning of narrow places.
4. Does it work on stainless steel?
The little padded earmuffs are ingenious and I’ve actually slept quite well in these — just test a small spot to make sure you’re not scratching the product off (I don’t think you will but it’s always best to test.)
5. Is this compatible with cordless drills?
Yes, if the drill or grinder is capable of running wire cup attachments.
6. Will it eat away at softer metals, like aluminum?
Yes, it is too aggressive for the soft metals — please stay with hard surfaces like steel.
7. Can it remove welding slag?
Yes, it’s good for post-welding cleanup.
8. Do the wires shed during use?
Yes it will shed a oil, but the knotted construction keep the bristles in place sturdy.
9. What gear should I be using for safety?
Safety glasses, gloves and protective clothing are a must.
10. How am I supposed to make the brush last longer?
No need to add a lot of pressure, tools should do the work.
