Supply - Manufacture - Repair - Since 1950
Propellers and Stern Gear
The stationary carbon flange is attached to the front side of the bellow with hose clamps, and the back end of the bellow fits over the Stern tube and is secured with hose clamps.
The stainless-steel rotor is fit on the shaft in front of the carbon flange. The stainless-steel rotor is used to compress the bellow before the rotor is secured to the shaft with set-screws.
This compression (pre-load) maintains constant contact between the two flat faces of the stainless-steel rotor and carbon flange, allowing the PSS to compensate for the variable fore and aft movement due to propeller thrust.
The carbon flange is over-bored to the shaft diameter allowing it to “float” around the shaft and thus compensate for most misalignment and vibration problems.
The stainless-steel rotor is sealed to the shaft by two O-rings that are recessed into the bore of the collar.
These O-rings rotate with the shaft and stainless-steel rotor and do not experience wear during operation.
The stainless-steel rotor is fit on the shaft in front of the carbon flange. The stainless-steel rotor is used to compress the bellow before the rotor is secured to the shaft with set-screws.
This compression (pre-load) maintains constant contact between the two flat faces of the stainless-steel rotor and carbon flange, allowing the PSS to compensate for the variable fore and aft movement due to propeller thrust.
The carbon flange is over-bored to the shaft diameter allowing it to “float” around the shaft and thus compensate for most misalignment and vibration problems.
The stainless-steel rotor is sealed to the shaft by two O-rings that are recessed into the bore of the collar.
These O-rings rotate with the shaft and stainless-steel rotor and do not experience wear during operation.
You will need to select your shaft diameter and the outside diameter of your stern tube (shaft log).
Please contact us if you require technical advice
Click here for Sigmadrive Brochure
Click here for the Sigmadrive selection guide
SIGMADRIVE MODEL: SD55.
Suitable for Engines from 5hp to 100hp. Dependent on RPM and Gearbox reduction.
Available for Metric & Imperial shafts sizes between 25mm and 1-1/2″ range.
Example of standard 4″ Gearbox Adaptors – PRM, HURTH, BORG WARNER, TMC, ZF, YANMAR & VOLVO*
Cutless Bearings
from £34.00
Standard Imperial Brass Shelled Cutless Bearings
T.Norris Marine
Available to purchase online, or contact us directly. Brass Shelled Water Lubricated "Cutless" Bearing Please contact us for non-standard siz...
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from £34.00
Standard Metric Brass Shelled Cutless Bearings
T.Norris Marine
Available to purchase online, or contact us directly. Brass Shelled Water Lubricated "Cutless" Please contact us for non-standard sizes PRIN...
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£38.00
'Westerley' 25mm x 34mm x 60mm Cutless Bearing
T.Norris Marine
Water Lubricated Cutless Bearing. Westerly Type 25mm I.D x 34mm O.D x 60mm Length Brass Shell
£38.00
Stuart Turner Phenolic Cutless Bearing for 1" Shaft
T.Norris Marine
Stuart Turner Cutless bearing 1" x 1-7/8" x 3-1/2" These Phenolic sleeved bearings are a replacement for the "All Rubber" (Hexagon Section) Stuart ...
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from £5.00
Stuffing Box Hose
T.Norris Marine
Heavy duty – Thick wall - 3/8" (10mm) – Textile Reinforced Hose. - Specifically for Flexible Stern Glands and Stuffing Boxes -(PRICED PER INCH)...
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from £6.00
Stuffing Box Gland Packing
T.Norris Marine
Graphite cotton gland packing is a replacement for the old traditional graphite asbestos packing rope. The cotton material is impregnated with grap...
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from £27.60
Seastar Teleflex 33c Red/Black Jacket Control Cables
T.Norris Marine
Teleflex/SeaStar/Dometic/ AquaflexThrottle/Gear Cable. The control cable is a very important component in the control system. It is the vital lin...
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from £160.00
Deep Sea Seal - EM Range
T.Norris Marine
FOR FULL RANGE OF PRICES, GO TO PRICE LISTS - Price List A.1 (Available to purchase online, or) CALL OR EMAIL US Fitting instructions here 13...
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Ordering & Delivery
We can supply most of our products domestically & internationally and send by Royal Mail, FedEx, DHL & UPS . Delivery charges will depend on location.
Orders: By Telephone, email or secure online ordering
Collection: Goods can be collected from our Stores in London
Visitors: Monday to Friday 8:00 a.m to 5:00 p.m.
e-mail: sales@tnorrismarine.co.uk
Telephone: 020 8560 3453
Address:
T.Norris Ltd
6 Wood Lane
Isleworth
Middlesex
TW7 5ER
England
We accept most major Credit and Debit cards, Paypal and ApplePay, Bank Transfer and can ship goods within the U.K. and Internationally.
All goods are subject to V.A.T. where applicable.
PLEASE CONTACT US DIRECTLY IF YOUR COUNTRY IS NOT LISTED WHEN CHECKING OUT ONLINE
T.Norris Marine Ltd
6 Wood Lane
Isleworth
Middlesex
TW7 5ER
England
Opening Hours
Monday - Friday
8AM - 5PM