Diamond grinding head (3/4")

SKU: 40291


Recognized worldwide as the benchmark for quality and value, our 3/4″ (19 mm) diamond grinding heads provide faster grinding, more grinding surface and more usable diamond. Available in a wide range of grits, they can be used wet or dry to grind and shape a wide range of products for hobby and home projects.

Because we plate our own diamond products, we can offer the absolute best drums at better prices than anyone else. The diamond coating on your Inland diamond grinding head will never peel from the drum, or we'll replace it for free for the life of the diamonds. You will never need to knock off the "bunchings" on an Inland bit—we don't call them bunchings, we call them defects—and our quality control system eliminates them.

Key features

  • More usable diamond makes them longer lasting; the larger diameter affords faster grinding and more grinding surface
  • Brass cores are manufactured on Swiss precision machinery for consistent and accurate tolerances; look for the distinctive precision quality rings
  • Color banding for easy at-a-glance grit identification
  • All Inland diamond grinding heads are measured for trueness before any diamond is applied. This insures that every drum will spin properly on the motor shaft
  • Use wet for shaping all types of stone, glass, tile, and other mineral based materials for home and hobby projects
  • Use dry to sand, shape, and finish a variety of plastics and woods for home and hobby projects
  • Our bits fit all American and German-made glass grinders and some Chinese models as well


  • Fits 0.312" (7.92 mm) arbor
  • TIR <.0025" (.0635 mm)
  • CDA 360 brass cores
  • 0.625" (15.88 mm) high diamond surface
  • Also known as WB-1


Customer Reviews

Based on 27 reviews
Gail Lass
The ONLY one I'll use

We all feel the pain from Glastar closing down and have scrambled to find alternative supplies. The Inland diamond grinding head that is 3/4" fits my Glastar grinder and is the best grinder head now on the market. I recommend this Inland grinding head over any other brand now available.

Mary Campbell
Grinder bit review

Am loving the Inland grinder bit I just received. I have never tried them before. It is working great. Hope it lasts longer than the other brands.

Judy Reynolds
Grinder tip

Love getting my grinder tips from Inland they’re the best quality and last a long time


I ordered the fine 220 grit bit. It's perfect for the edges of cabochons before firepolishing in the kiln. No issues with devit after firing.

Ruth Varley
Diamond grinding Bit

Fast shipping, easy installation and this new bit made my glass grinding projects easy to do.

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