Robins SG8

Machine shops that build small to large heads in heavy duty industry

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Machine Operations

  • Seat & Guide

PDF Resources

SG8 Brochure


Our consistent high quality has been built upon by our total commitment and complete specialization to the production of supreme quality valve seat and guide machines exclusively. Our unique production facility uses the most advanced manufacturing techniques and is governed by most rigid quality control.

Robins exclusive patented multi-angle seat tooling eliminates the need for bounce springs. Robins patented tooling holds the ball driver firmly, yet allows the sphere to float during seat cutting. This eliminates the troublesome bounce springs but gives you the ultimate in valve seat concentricity.

Robins machines offer a wide range of tooling & fixtures for machining a variety of cylinder heads as well as all the required operations from seat cutting, guide finishing to injector tube machining.

Features & Tooling
  • Robins Patented Spring Free Tooling
  • Live & Fixed Carbide Pilots
  • Roll-over & Tilt Fixtures
  • 3-angle cutting inserts – Edge Honed & Sub-Zero treated for longer life (Rubi-Hard inserts)
  • Tooling for aircraft cylinder heads
  • Tooling for all makes of seat & guide machines
  • Seat Roundness 0.002mm
  • Seat to Honed Guide Concern 0.005mm

SG8 Machine Specifications


Cylinder Head Size (in Roll Fixture)

1016mm x 305mm x 153mm

Spindle Tilt

+- 15 Degrees

Spindle Stroke


Spindle Speed

35-500 RPM

Surface Finish

0.5 – 1.25 μmRa

Micro Fine Feed


Spring Free Tooling


Constant Varying Speed