Bear Claw

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The Bear Claw Mill was specifically designed with large, chisel inserts to give high ROP when milling cement.

The chisel shaped inserts are not recommended for drilling new formation or for milling metal.

• Available in sizes 1 3/4″ to 8 3/4″ in 1/8″ increments
• Bodies are manufactured from 4140 heat treated steel.
• Carbide inserts range in size from 5/16″ inch to 5/8″ inch and are manufactured from special grade carbide for maximum durability.
• Full body design – no fishing for lost cones.
• Circulation ports from 5/16 in. for motor applications to 1 1/4 in. for reverse circulation.
• Weight and RPM can be adjusted for maximum penetration rates without worry of bearing failures or damage to mill.
• CNC machined bodies and threads for accuracy.
• Same day shipping on most sizes.

Recommended WOB: Lbs./In of Mill Diameter
3″-4″ 2,000-6,000
4″-5″ 3,000-6,000
5″-7″ 3,000-9,000

RPM – 80-120 400 motor

Have more questions about our mills?  Visit our FAQ page.

Circulation Port Sizes

Mill Size Number of Ports Port Size

1.75″ & 1.875″ 3 2 @ 5/16″, 1 @ 1/4″

2″ – 2.25″ 3 2 @ 3/8″, 1 @ 1/4″

2.375″ – 2.5″ 3 2 @ 7/16″, 1 @ 5/16″

2.626″ 3 2 @ 1/2″, 1 @ 1/4″

2.75″ – 2.875″ 3 2 @ 1/2″, 1 @ 5/16″

3″ 4 2 @ 1/2″, 2 @ 5/16″

3.25″-3.625″ 2 2 @ 3/4″

3.75″ – 3.875″ 2 2 @ 7/8″

4″-5.75″ 2 2 @ 1″

5.875″ – 6.75″ 2 2 @ 1 1/8″

7.785″ – 8.75″ 3 3 @ 1 1/4”

Circulation ports can be modified for reverse circulation or down hole applications.

The Bear Claw Mill is available with the following pin connections:

Pin Type Make up Torque Ft/Lbs

1″ AMMT/MTDSI 410

1-1/4″ AMMT/MTDSI 630

1-1/2″ AMMT/MTDSI 960

2-3/8″ API REG 3,000-5,000

2-7/8″ API REG 6,000-7,000

3-1/2″ API REG 7,000-9,000

4-1/2″ API REG 12,000-16,000

2-3/8″ PAC 2,960

**4THD NROD

**3THD AWROD

** All threads manufactured with hardened and certified gages except these.

Standard body design is convex but concave design is available on both the Bear Claw and Chomp Mill for special milling needs.

Still have questions? See our KC Bit Mills FAQ. (link)

(I would like to have a link somewhere on the page to download the spec sheet for the bear claw mill)