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SG 5.1

US Patented Technologies

Worlwide Distribution

40+

Years Manufacturing

SG 5.1

SG 5.1
SG 5.1 - Image 2
SG 5.1 - Image 3

Description

The Robins SG 5.1 is the industry standard for cylinder head seat and guide machining, offering both reliability and economic efficiency.

Its high-precision carbide centering pilots, integrated within a lightweight air-float work head, ensure accurate concentricity between the valve guide and cylinder head bore, minimizing runout and optimizing valve train performance.

Designed for versatility, the SG 5.1 is suitable for reconditioning domestic and imported performance automotive cylinder heads, as well as motorcycle engine components. Robins also provides customizable tooling options, allowing workshops to tailor the machine to their specific needs, improving efficiency and workflow.

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Product Details

  • Specifications
  • Features
  • Working Accuracy
  • Documents
  • Videos

Product Details

  • Specifications
  • Features
  • Working Accuracy
  • Documents
  • Videos

Specifications

Machine weight 1340 lbs (608 kg)
Max cylinder head size 23″ x 10″ x 5″ (584 mm x 254 mm x 127 mm)
Work head travel 18.200″ (462 mm)
Spindle stroke 5.750″ (146 mm)
Spindle stroke 0.75 HP
Variable speed spindle 70 - 570 rpm (60 hz)
Spindle tilt ± 10 Degrees

Features

  • Spring free tooling
  • High precision three angle cutting tools
  • Quick change tool retention system for fast location over pilot and accurate centering (patented)
  • Eliminates bounce springs
  • Variable spindle speed
  • Reverse RPM for tapping
  • Machine work head floats on air cushion for precision centering
  • Steering wheel for rapid feed for precise valve seat depth and finish
  • One LED work lights – either side of the spindle giving shadow less view
  • Portable in vacuum tester, kit includes hose, and quick change pads

Working Accuracy

  • Valve seat roundness: 0.0001” (2.0 µm)
  • Valve seat to honed-guide concentricity: 0.0002” (5.0 µm)

Documents

Title of Document Title of Document Title of Document Title of Document

Videos

https://www.youtube.com/watch?v=pSsqKDgdg_Q

 

 

Key Aspect

Compare model Specs

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Current Model
Model:SG 5.1
Machine weight1340 lbs (608 kg)
Max cylinder head size23″ x 10″ x 5″ (584 mm x 254 mm x 127 mm)
Work head travel18.200″ (462 mm)
Spindle stroke5.750″ (146 mm)
Spindle stroke0.75 HP
Variable speed spindle70 - 570 rpm (60 hz)
Spindle tilt± 10 Degrees
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Comparison Model
Model: SG 7.1
Machine weight1653 lbs (750 kg)
Max cylinder head size32″w x 10″d x 5″h (812 mm x 254 mm x 127 mm)
Work head travel29.50″ (749 mm)
Spindle stroke6.700″ (175 mm)
Spindle stroke0.75 HP
Variable speed spindle50 - 440 rpm (50 hz)
Spindle tilt± 15 Degrees
Model: SG 8 and SG 8 Smart
Machine weight2866 lbs (1300 kg)
Max cylinder head size40″ x 12″ x 6″ (584 mm x 254 mm x 127 mm)
Work head travel42.000″ (462 mm)
Spindle stroke8.400″ (146 mm)
Spindle stroke2.0 HP
Variable speed spindle30 - 500 rpm (50 hz)
Spindle tilt± 15 Degrees
Model: SG 12 and SG 12 Smart
Machine weight3637 lbs (1650 kg)
Max cylinder head size47″w x 15″d x 10″h (1193mm x 381mm x 254mm)
Work head travel42.000″ (1066 mm)
Spindle stroke8.400″ (213 mm)
Spindle stroke2.0 HP
Variable speed spindle30 - 500 rpm (50 hz)
Spindle tilt± 15 Degrees