L S Starrett BEARING COMPANY

Keystock Bearings

Keystock are removable bars that are used to transmit torque from components including couplings, sheaves, sprockets and gears to a shaft. They are called “keys” because they lock a component to the shaft by means of a corresponding keyway in a shaft. Keystock is available in both inch and metric sizes. Common keystock materials include steel, stainless steel and plated with zinc and are supplied in standard lengths of 12” long. Keystock can be rounded at both ends, squared at both ends, or rounded at one end and squared at the other.

There are many different types of keystock available including machine keys, Woodruff keys, hi-pro keys, gib head keys, and hex keys. Machined keystock is available in standard sizes and ready to use without additional cutting or filing. Woodruff keys are semi-circular components (half moon) installed deep in a shaft and firmly embedded. Hi-pro keys are similar to Woodruff keys, but lock into place. They provide superior strength and vibration resistance. Gib head keys are notched and tapered to tightly couple gears or pulleys with a shaft. Hex keys are L-shaped bars with a hexagonal head. They are used to turn screws with hexagonal sockets. The following chart details standardized keyways and setscrews utilized for inch sized shafts:

Precision Brand 54125 Keystock Bearings
2 mm
4.360 kg
Precision Brand 54225 Keystock Bearings
19 mm
C0
Precision Brand 53506 Keystock Bearings
Expansion Bearing &#
Round
Precision Brand 56510 Keystock Bearings
4,500,000 N
2,110,000 N
Precision Brand 14710 Keystock Bearings
Positive Tolerance
For Outer Ring
Precision Brand 54430 Keystock Bearings
Round flange shape
Silicone
Precision Brand 14225 Keystock Bearings
6
Steel plate cover
Precision Brand 55585 Keystock Bearings
68 kN
35 mm
Precision Brand 54499 Keystock Bearings
Nitrile
Insert Bearing Unit
Precision Brand 54400 Keystock Bearings
22334 CCK/W33
W 34
Precision Brand 54525 Keystock Bearings
No
No
Precision Brand 54625 Keystock Bearings
Lubrication Fitting
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