Main specifications
Material
Hardened steel, class 10.9 (tensile strength 1000 N/mm²).
Standard executions
- GN 709.8-B: hardened steel flat-faced ball (54+2 HRC).
- GN 709.8-K: acetal resin based (POM) technopolymer flat-faced ball, natural colour.
- GN 709.8-R: hardened steel knurled flat-faced ball (54+2 HRC).
Retaining ring
NBR synthetic rubber O-Ring.
General information
Features and applications
GN 709.8 grub screws are suitable for clamping of parts to be machined. The flat-faced (non-reversible) ball allows to compensate for any misalignment of the contact surfaces up to 10°.
The O-ring keeps the ball in position and prevents the penetration of dirt.