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 17 reviews
Patti Weiland
Exactly what I needed

Customer service easy to work with and got me the right part the very first time! Thank you!

Kathleen Nolan

Just tried my new standard bit from Inland! Wow! It's wonderful. Wish I had ordered my new bit sooner. Will do so in the future. Inland is fast and super responsive, too. (I have an Inland Wizling grinder and I love it!)

Michelle Jensen

Diamond grinding head (3/4")

Lorie Smith
Diamond grinder

Works perfectly

Sherry Deters

It’s not as good quality as my other grinder bits and has less grinding surface.

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