Polymer Sleeve Type Pilot Bore

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These Polymer Sleeve Couplings have been designed around a hollow sleeve with internal toothing produced through injection moulding and are for use as a general purpose flexible couplings. They are available in ten sizes that cater for shaft sizes from 6.0mm to 65.0mm with a torque capacity range from 11.5nm to 840nm.

The special polymer sleeve is resistant to most of the common chemicals and moderate heat (max 80°C) which allows it operate in ambient temperature conditions of -20°C to +120°C with short peaks of 150°C.

Another feature is the Barrelling of the gear tooth form which allows it 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 or for bell housing applications and can be re-machined to suit individual customer’s shaft sizes on quick lead times as required.

Additional information


Steel C43 UNI 7847



Ambient Temp

-20C to 120C

Peak Temp


Torque Capacity


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)
SG14 50 84 67 6-14
SG19 54 84 69 8-19
SG24 56 104 80 10-24
SG28 84 114 99 10-28
SG32 84 114 99 12-32
SG38 84 124 104 14-38
SG42 88 124 106 20-42
SG48 104 124 114 20-48
SG55 108 134 121 25-55
SG65 114 144 129 25-65

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!



Be careful if you are only trying to replace just a hub or a sleeve as there are numerious Brands such as the Giflex & FBX which are dimensional very similar but are not interchangeable. Therefore close attention need to be paid to the pitch and the number of the teeth as these can differ. If in doubt please replace the complete coupling!

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