Crosstech 847KR Modified Shoulder Diamond Bur, FG – Pack of 5

Product Overview

The Crosstech 847KR modified shoulder diamond bur is a friction grip (FG) multi-use diamond bur from Crosstech Canada, listed in the Crosstech 2026 catalog under ISO No. 847KR (ISO shape no. 172KR). It is offered in 3 head sizes, with a choice of grit and regular or short FG shank. Modified shoulder diamonds are commonly used for crown preparations with rounded shoulder margins.

Sold as a pack of 5 burs. Select the options below; each combination has its own Crosstech product code.

Key Features

• Natural diamond – Crosstech states its multi-use diamonds are manufactured with natural diamonds
• Multi-coating – Crosstech states a Swiss multi-coating technique is used
• Heat-treated one-piece stainless steel shank (per Crosstech)
• Colour-coded grit – grit identified by colour band (see grit guide below)
• Pack of 5 burs per variant

Specifications

• Manufacturer / brand: Crosstech (Crosstech Canada)
• Bur type: Diamond
• Shape: Modified Shoulder
• ISO No.: 847KR
• ISO shape no.: 172KR
• Size options: 016 – Ø1.6 mm (tip 1.2) × 8 mm, 018 – Ø1.8 mm (tip 1.4) × 8 mm, 023 – Ø2.3 mm (tip 1.7) × 8 mm
• Grit options: Super Coarse, Coarse, Standard, Fine, Extra Fine, Gold, Gold Super Coarse, Gold Fine
• Shank options: Regular FG, Short FG
• Shank: Friction grip (FG) – regular (FG 31) and/or short (FG 33) as listed per size
• Package quantity: 5 burs per pack

Grit Colour Guide

Crosstech colour-codes diamond grit as follows: super/extra coarse – black, coarse – green, standard – blue, fine – red, extra fine – yellow. Gold-series codes follow the Crosstech catalog.

Available Variants & Ordering Codes

Purchasing Information

Crosstech burs from NNA Medical, a Canadian dental supply store. Product codes, sizes and specifications are taken from the Crosstech 2026 catalog. Product images are taken from the Crosstech catalog and show the bur shape and size; the grit colour band may not be shown.