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 12 reviews
Patsy Wiggleton
Great grinding heads!

I've tried less expensive grinders heads and they don't last near as long as these from Inland. In the long run they save money for sure! Love your products!

Megan Morrison
Grinder bit and grease

So far I am liking both products. I have an old wizling and had no fit issues. The grease will last for multiple uses. Now I just need to grind some glass!

Barbara L Shellhorn
Best grinder bits

Love inland grinder bits.

Emily H

Great product like everything else offered here! Always happy with my purchases.

Kathleen Dawson
Exactly what I needed

Grinding heads were exactly what I needed and top quality. Service was great

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