Blog
Tips, guides & industry news from the Pro-Graad team.
Yellow Cloth Buffing & Polishing Cartridge Rolls: Sizing, Mounting & Mandrel Guide
Pro-Graad yellow cloth cartridge rolls: how they mount, which mandrel length fits your bore or recess, and how to choose the right diameter and pack...
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Cylinder Honing: Cross-Hatch Angle, RPM, and Stroke Rate
Run it at 600 RPM for a 45-degree cross-hatch is the most repeated advice in engine building. In a four-inch bore the arithmetic says about...
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Angle Grinder Adapters: Run Any Accessory Off a 5/8-11 Spindle
Everything mounts to a 5/8-11 spindle — until it doesn't. Here's the adapter for every accessory that won't thread on straight.
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Strip Discs: Removing Paint, Rust, and Coatings Without Damaging the Substrate
"Won't harm the base metal" is a claim about steel. On aluminum and fiberglass the disc doesn't stop. How to remove paint and rust without...
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Why Your Bench Grinder Wheel Won't Fit
A wheel that won't seat is almost always a bore-to-shaft mismatch, not a bad wheel. Arbor sizes, the import-thread mess, and the bushing that makes...
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Which Drain Cutter Head Clears Which Clog
Most drain head returns have nothing to do with the clog. They happen because the head will not couple to the cable. Start there, then...
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Backing Pad Selection & Why Your Disc Wobbles
A wobbling, gouging, one-sided disc is almost never the disc — it's the pad or the mount. The hardware layer every disc guide assumes and...
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Cartridge Rolls and Spiral Bands: Finishing Bores and Tight Radii
Most people shop for the roll and take whatever mandrel comes in the box. That is backwards, and it is why cartridge rolls seem like...
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Bristle Discs vs Wire Wheels: When to Stop Using a Brush
Wire cuts by impact and sheds steel filaments. Bristle cuts by abrasion in six known grades. Six questions that tell you which the job actually...
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