Diamond grinding head (1")

SKU: 40299


Recognized worldwide as the benchmark for quality and value, our 1″ (25 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-9


Customer Reviews

Based on 8 reviews
Lorie Black
Replacement grinder heads and second story work surface

I have a Wizard grinder from the 80s and always find quality replacement grinding heads at Inland. Bought the second story work surface this time as well and it fit my Wizard as well! Can't wait to try it out! Always quality products and quick shipping.

Tammy Starforth
Love it!

I have been very impressed with the quality and customer service from Inland. I highly recommend their products.

Barbara L Shellhorn
great grinding bit

I have an Inland grinder and only use Inland grinder bits. They grind better and last longer.

Besoin de votre avis

Est-ce ça remplace l’image que je vous envoi?

Bonjour à tous! Oui. Faites-nous savoir si vous avez d'autres questions.

Myrtle Denetclaw

I received my order fast and happy with the packaging. Satisfied customer.

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