Fireball Tool

10/16/2026

Why Does This Grinder Motor Jump Up and Down?

This grinder has a very fast jump start; however, this is accounted for from the very beginning. This grinder runs 10” tires instead of rigid wheels, and those tires grow and shrink as they spin up to 5,000 SFPM. The belt can’t change length, so the motor moves up and down to keep tension constant.
That makes perfect belt tracking, no over-tensioning, and fewer snapped sanding belts. The design also makes it easy to swap belts quickly.

Watch the full build on YouTube and get the plans at fireballtool.com

10/15/2026

Do you use a bandsaw or a belt grinder for a 45 degree cut?

You guys said belt sanders are just needed for cleaning and polishing. If you need to remove more than 6 inches of material, just cut it with a bandsaw. Today in the shop, we’re going to test if a belt grinder saves time in removing inches of material over a belt sander. And show that using a belt grinder is faster than switching workstations to the bandsaw. We tested a real shop task: a 45-degree bevel on the end of a tube. Let’s see what the results look like.

Find the plans to make your own DIY go-kart belt grinder only at Fireballtool.com

10/14/2026

A 5HP and 5000 SFPM belt grinder for under $1000? Sounds pretty good! But some of you guys are saying that’s too much for all the materials to build it. So here’s a quick price breakdown. I invite you guys to look for another belt grinder for the same price, and we’ll test it.

If you want to build it yourself, the plans are available at fireballtool.com

10/13/2026

Is this DIY belt grinder worth twice the price of a Harbor Freight belt sander? If you square stock, clean up bandsaw cuts, or do any heavy metal removal, these side-by-side tests might settle it for you.

If you want to build this DIY go-kart grinder at home, the plans are available at Fireballtool.com

10/12/2026

Belt sander Vs Belt grinder: which one removes more material?

We put a $325 belt sander up against a $1,000 DIY go-kart belt grinder in the Fireball 1/2” rod test, which measures how much material each machine can remove in one minute of continuous grinding. The belt sander is running on a 24-grit belt with 1 horsepower, while the DIY go-kart grinder is running on a 36-grit belt with 5 horsepower. The belt sander removed only 2 inches of rod. The Fireball DIY go-kart belt grinder removed over 10 inches, and that’s with a finer grit and a worn belt. Speed and horsepower make the difference.

Want to build your own DIY go-kart belt grinder? Plans are at fireballtool.com. Try the rod test in your shop and share your numbers in the comments and on the Fireball Tool forum!

10/12/2026

𝗧𝗿𝗮𝗱𝗲 𝗦𝗵𝗼𝘄 𝗗𝗲𝗮𝗹𝘀 are on 🔥
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Every order: 10% off
$250+: 15% off + free Tower Key Holder 3-Pack
$500+: 20% off + free Tower Key Holder 3-Pack
$3,000+: $750 off + free Tower Key Holder 3-Pack
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𝗢𝗰𝘁 𝟭𝟮 - 𝗡𝗼𝘃 𝟭𝟱 • Discount applied at checkout.
See us at 𝗙𝗔𝗕𝗧𝗘𝗖𝗛 (Oct 21-23, Booth ) and 𝗦𝗘𝗠𝗔 (Nov 3-6, Booth #36181)
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Link in bio
tooldeals

Oct 12 – Nov 15, 2026 · Online at fireballtool.com FABTECHMeet us in Vegas · Booth → Trade Show Deals Up to 20% off + a free Tower Key Holder 3-Pack. The more you build, the more you save. Shop the bundles What will I save? No code needed. Discount applied at checkout. Free gift on ord...

10/08/2026

Can this diy go-kart belt grinder really hog metal? 

This is part 17 of making this DIY go-kart belt grinder. Today we’ll be testing how fast this grinder can hog away metal. On a 3M 60-grit belt, it cut like butter and ran smooth. Then came the timed rod test: one minute of grinding 1/2” mild steel on a used 36-grit Norton Blaze. My big 5 HP Go Kart grinder does about 10 1/4”, so anything in the 6–8” range would be a win on this budget. The result? Over 6” chomped off in 1 minute, with chips coming off in long strings. And that was even with my table casters unlocked. It’s compact, and it still feels like my big grinder. It took about 8 hours to build for under $1000. 

If you want to build this DIY go-kart grinder at home,the plans are available at Fireballtool.com

10/08/2026

Can this go-kart belt grinder run on a flat tire?

Now that the grinder works, let’s run some operating tests! First, the vibration check.The go kart wheels aren’t perfect, but vibration is minimal. Remember the flexure? A little turn of the wrench tracks the belt left or right, then it locks down easily. I drained a tire completely flat to test how it would run, and nothing happened. Centrifugal force balloons it back up, and my big grinder runs with no air at all for a smoother, cushioned ride. Next up, how much material can this thing remove?

If you want to build this grinder at home, the plans are available at Fireballtool.com

10/07/2026

Will this belt grinder work for under $1000?

It tracked perfectly on the first try, but the motor jumped. With no soft start, it hits full RPM instantly and the wheel walks up the belt. The fix is a light-duty shock mounted to the ball pivots I installed earlier. It dampens the startup jolt, and now it’s much better. A little jump is still expected. Tomorrow I’m testing the tracking system by letting the air out of the tires, just to see what happens.

Plans for this DIY go-kart belt grinder are available at Fireballtool.com

10/07/2026

How do you dial in a belt grinder? 

This is part 14 of making a DIY go-kart belt grinder. Today,  we’re assembling the platen. The platen’s three bolts work like a gimbal to tilt and shift it. I set it just barely touching the belt, since a 1/16” gap is fine, but it should never add tension. Six heavy tacks will hold the work rest bracket without warping the plate. After a coat of Regal Red, adding a shift k**b like the original, and a quick tracking adjustment, the work rest is on and square! Tomorrow I’m flipping the switch for the very first time. Let’s see if all that work paid off.

If you want to build this grinder and follow along, the plans are available at Fireballtool.com