Description:
Steel positioning cone with embedded precision balls for a high-precision centring unit.

Application:
Used with the matching positioning bush to locate two components with very high repeat accuracy.

Features:
- Repeat accuracy less than 0.003 mm
- Precision balls are embedded in vulcanised rubber
- Rubber is insensitive to dirt and swarf and does not become brittle
- Small embedded swarf splinters do not impair the system
- Supplied ready for fitting to the counterpart component

Operation:
- When cone and bush are mated, the balls are compressed within the elastic range of the rubber
- The components self-align precisely at the common centre
- A separate retraction mechanism must provide the required down force

Material:
- Cone: Steel
- Balls: Ball-bearing steel

Finish / Version:
- Cone: Hardened and ground
- Balls embedded in vulcanised rubber

Dimensions:
- Size: 3
- D1 H7: 10 mm
- D2 / Internal thread: M8
- H minimum: 21 mm
- L maximum: 35 mm
- L1: 18 mm
- T minimum: 18 mm
- Maximum permitted mating centre offset: 3 mm
- Maximum working temperature: +80 degC

Load / Force Data:
- Minimum down force with 1 centring unit: 2.5 kN
- Minimum down force with 4 centring units: 10 kN
- Maximum lateral force during horizontal mating: 250 N

Accessories:
- Matching positioning bush: K1628.3

Notes:
Centring units are designed for positioning only, not for absorbing machining or lateral loads. Ester-based or antifreeze coolants should be avoided.