Tenby Tamar launch

Peterhead Tamar at sea

RNLI Tamar fitting after 500 hours trials

This fixing shows fared in stainless steel straps which are clamped around the composite stern tube, the shaft has zero forward and aft movement allowing the grey composite spool material (toughRtex™) to almost fill the gap between prop and bearing, enhancing water flow from stern tube to prop blades.

These cutters were installed by DML in Plymouth.

SH25 fitted by Darthaven Marine to Penhelyg.
Photos courtesy of owner, and below the 16mm braided rope it cut whilst in Weymouth harbour full story in testimonials page.

SH 16 fitted by JPC Marine Lowestoft using composite spool.

New shaped cast stainless S16 and SH16 fitted by D.K Collins marine in Jersey.

A more difficult fitting on a 2" shaft motor sailor (CW35). The problem involves having the cutter rigidly fitted close to the prop to withstand loads generated when cutting. A tube support is the only option. This was fabricated out of 316l stainless with an internal flange welded in place to use the existing stern gland mounting bolts. The cutter was then bolted to an internal spacer at the rear of the tube, allowing the cutter to be positioned close to the spool.

The final result is pictured below.

Photographs courtesy of Mr J.Hawkins, engineer used for fabrication: Haggart Commercial Marine Engineers, Plymouth. Boat was based at the Boatshed Mountbatten, Plymouth, whilst work was carried out.

A Custom installation on a large shaft. Due to the overhang to allow for shaft movement the cutter is welded to a plate to spread the load. The cutting surface normally a spool consists of a sleeve of ablative material over the propeller hub.

An S25 installed on large hydraulic drive of roughly 1.8m diameter the cutter can just be seen mounted to the motor housing, with the blades running on a ring attached to the prop hub.

The outboard cutter on Suzuki 4stroke 115hp

This was just before speed trials were carried out, no loss of power or speed were evident.

A standard shaft fitting of the small cutter with bronze spool.

A close up of the assembly.

S25 fitted to a commercial fishing boat.

(photos courtesy of Sabre Tooth Charters )

QuicKutter™ and SandStopper™ fitted to commercial craft in Western Australia.

Our mobile demo unit at a recent show.

We are happy to visit boat builders, yards and clubs to demonstrate the cutters operation. Call for a demo 01822 852466 or e-mail Demo please

Clicking on this small video clip will allow you to access the 1.6mb Quicktime video showing the cutter in more detail.

If you don't have quicktime you can download quicktime player from here