Giflex Internal Gear Steel Sleeve Type Pilot Bore

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The Giflex Range of Internal Gear Couplings have Steel Sleeve with Hermetic seals at each end, enabling them to be used in many hazardous enviromental Conditions and providing a higher torque capacity range of 600nm to 90,000nm.

They are available in nine sizes and two design types, the GFA type having two removable internal gear hubs and the GFAS type have one fixed solid hub and one removable internal gear hub. Both the Steel Sleeve and the hubs are manufactured from hardened carbon steel with a tensile strength of 800n per m2.

Another feature is the CNC machining to DIN 3992 Class 7 Precision to provide the Crowning and Barrelling of the gear tooth form which eliminates tooth edge pressure and allows them to accommodate both Radial as well as Angular deviation or misalignment.

The stock range is available as a pilot bore coupling as either a short hub length or a long hub length or as a combination of each which allows for flexibility of spacing between shafts and can be re-machined to suit individual customer’s shaft sizes on quick lead times as required.

Additional information




Steel C43 UNI 7847

Tensile Strength

800n per m2

Torque Capacity


CNC Machining

DIN 3992 Class 7

Range of Sizes

Coupling Ref. Type NN 2 x Short Len Hubs = Coupling (mm) Type LL 2 x Long Len Hubs = Coupling (mm) Type NL 1 x Short + 1 Long Len Hubs = Coupling (mm) Shaft Size Range Min – Max (mm)
GFA/GFAS25 85 123 104.00 0-28
GFA/GFAS32 100 163 131.50 0-38
GFA/GFAS40 115 163 139.00 0-48
GFA/GFAS56 140 204 172.00 0-60
GFA/GFAS63 153 243 198.00 0-70
GFA/GFAS80 170 285 227.50 0-90
GFA/GFAS100 216 355 273.00 0-110
GFA125 288 423 355.50 40-140
GFA155 370 498 435.00 40-175

Free Drive Design

A Free Design selection service is available for this product for full details and application requirements please follow this link.


Reworking Service

To compliment this range of Drive Couplings the company can also provide a variety of finishing services, to suit individual customer’s own requirements, and briefly include :-

  • Boring
  • Keywaying
  • Broaching
  • Drill & Tapping
  • Wire Eroding

Plating Service

A Full range of add on Plating Finishes is available :-

  • Zinc (Clear & Yellow)
  • Nickel
  • Chemically Black Phosphate
  • Hard Anodising for Aluminium Products!

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