Allen Swivel Jammers


Standard Self-Aligning Mainsheet Jammer


Allen Standard Self-Aligning Mainsheet Jammer


Standard Self-Aligning mainsheet jammer.

The Allen Mainsheet Jammer is designed to prevent the sheet from wrapping round the block resulting in extra control for faster, smoother tacks and gybes.

By moving the block outward from the swivel and angling it away from the cleat the mainsheet system creates turning force on the block and jammer meaning the cleat will always be forced to point away from the boom and towards the helm.

  • Self aligning to windward,
  • Smooth rotation,
  • Innovative light weight construction,
  • Aluminium arm,
  • Dual ball race for maximum efficiency,
  • Optional click stops limit swivel rotation,
  • Line snags virtually eliminated,
  • Standard and high cleating angles to suit all,
  • Angle of rotations - 180, 220, 360.


Part Description Fix hole
size mm
Centre mm
Max Work
Weight g RRP
AL-5266 Standard height M5 19.5 x 19.5 600 406 £175.66 EACH
AL-5266-A Standard height c/w AL-2160 ratchet block M5 19.5 x 19.5 600 500 £218.47 EACH

Related Products






    contact us

ISO 9001 logo ProBoat Ltd
Burnham Business Park,
Burnham - on - Crouch,

Phone - +44 (0)1621-785455
E mail - info@proboat.co.uk



Our communications keep you informed about our new products, offers and events.
Click here and we will include you in our e-mailings, we do not divulge your address to third parties.

Although great care is taken to ensure the information in this website is accurate, all information is given for guidance only and is not contractual.
We reserve the right to alter specifications without notice. The purchaser is responsible for choosing the correct product for it's particular application.
All goods are supplied according to our conditions of sale which are available on request at any time.