Vetus Sterngear Systems

As important as a reliable engine!

As far as corrosion resistance is concerned, Duplex 1-4462 is equivalent to stainless steel, type AISI 316. However, it has a tensile strength which is about 30% higher and a hardness of about 40% higher then AISI 316. It is exactly this high degree of hardness which gives Duplex 1-4462 its excellent running properties in bearings. Moreover, it offers much more resistance against wear and tear in the way of bearings and seals. (Please note that older Vetus shafts were fabricated from Remanit 4418 which had different comparisons with AISI 316).

A Vetus propeller-shaft assembly consists of:

A tapered, straightened and polished Duplex 1-4462 stainless steel propeller shaft with keyway, thread, lock washer, key and propeller nut with integrated zinc anode. All shaft tapers and keyways have dimensions in accordance with ISO 4566 (1:10 taper)
Outer bearing with incorporated rubber bearing soldered to bronze stern tube
Mounting flange for outer bearing
Mounting flange for stern tube
Flexible stuffing box with rubber sleeve for shaft
Propeller

Water lubricated stern gear

Vetus have designed and developed a shaft assembly which can be installed with a minimum of fuss. Machining, threading and keyway cutting have all been taken care of. In addition, these shaft assemblies protect the environment: lubrication is ensured by means of raw water, without use of grease or oil. The stern tube is provided with a dual shaft seal, eliminating the need for a stuffing box. The stern tube may be supplied in GRP, bronze or steel.

Propshaft: Diameter	Standard shaft lengths (mm)	Propeller nut	Standard stern tube lengths (mm)	Stern tube outer diameter	Inner bearing
25mm	1000/1500/2000 longer lengths to order	M16 x 1.5	500/1000 longer lengths to order	GRP - 44mm Bronze - 43mm Steel - 51mm	Dual lip seal
30mm	1000/1500/2000/2500 longer lengths to order	M20 x 1.5	500/1000 longer lengths to order	GRP - 50mm Bronze - 49.5mm Steel - 54mm	Dual lip seal
35mm	1000/1500/2000/2500 longer lengths to order	M24 x 2	1000 longer lengths to order	Bronze - 57mm Steel - 60mm	Dual lip seal
40mm	1000/1500/2000/2500 longer lengths to order	M24 x 2	1000 longer lengths to order	Bronze - 62mm Steel - 63.5mm	Dual lip seal
45mm	1000/1500/2000/2500 longer lengths to order	M30 x 2	1000 longer lengths to order	Bronze - 72mm Steel - 70mm	Dual lip seal
50mm	1000/1500/2000/2500 longer lengths to order	M36 x 2	1000 longer lengths to order	Bronze - 77mm Steel - 76mm	Dual lip seal

Please contact us for further information and prices.

Propellers

A ship's propeller is possibly the most important component of a motorboat. Vetus make good use of a specially developed computer programme which ensures the determination of the exactly right propeller for your boat, with the aid of some (correct!) inormation which is required from the customer.

Five types of managnese-bronze propeller are available:

P3B: 3-blade suitable for displacement craft with speeds of up to 10 knots
P3C: 3-blade suitable for faster craft
P4E: 4-blade suitable for semi-planing boats with speeds of more than 16 knots
P4G: 4-blade suitable for semi-planing boats with speeds of more than 16 knots
P5E: 5-blade suitable for semi-planing boats with speeds of more than 16 knots

Shaft diameter	P3B prop diameter	P3C prop diameter	P4E prop diameter	P4G prop diameter	P5G prop diameter	Shaft taper	Keyway
25mm	12" - 15"	12" - 15"	14" - 15"	-	-	1:10	8mm
30mm	16" - 18"	16" - 18"	16" - 17"	On request	On request	1:10	8mm
35mm	19" - 21"	19" - 21"	18" - 20"	On request	On request	1:10	10mm
40mm	22" - 24"	22" - 24"	21" - 22"	On request	On request	1:10	12mm
45mm	25"	25"	23" - 24"	On request	On request	1:10	14mm
50mm	greater than 25"	greater than 25"	-	On request	On request	1:10	14mm

Please contact us for further information and prices.

Cutlass bearings

Vetus water lubricated cutlass bearings have a polyurethane-rubber lining and can be supplied with outer bearings made of either bronze or phenolic resin. Phenolic is lighter in weight and can not corrode: these are ideally suited for installation into aluminium boats and they can be replaced very easily. Vetus rubber bearings are, upon request, also available for larger shaft diameters and for other combinations of dimensions.

Propshaft diameter		Stern tube internal diameter		Overall bearing length		Materials
25mm		40mm		100mm		Bronze / Phenolic
25mm			1 1/2"		4"	Bronze / Phenolic
	1"		1 1/2"		4"	Bronze / Phenolic
	1 1/8"		1 5/8"		4 1/2"	Bronze / Phenolic
30mm		45mm		120mm		Bronze / Phenolic
30mm			1 3/4"		5"	Bronze / Phenolic
	1 1/4"		1 3/4"		5"	Bronze / Phenolic
35mm		50mm		140mm		Bronze / Phenolic
	1 3/8"		1 7/8"		5 1/2"	Bronze / Phenolic
35mm			1 7/8"		5 1/2"	Bronze / Phenolic
	1 1/2"		2"		6"	Bronze / Phenolic
40mm		55mm		160mm		Bronze / Phenolic
40mm			2 1/8"		6 1/2"	Bronze / Phenolic
	1 5/8"		2 1/8"		6 1/2"	Bronze / Phenolic
45mm		65mm		180mm		Bronze / Phenolic
45mm			2 3/8"		7"	Bronze / Phenolic
	1 3/4"		2 3/8"		7"	Bronze / Phenolic
50mm		70mm		200mm		Bronze / Phenolic
50mm			2 5/8"		8"	Bronze / Phenolic
	2"		2 5/8"		8"	Bronze / Phenolic
60mm		80mm		240mm		Bronze / Phenolic
	2 1/4"		3"		9"	Bronze / Phenolic
60mm			3 1/4"		9 1/2"	Bronze / Phenolic
	2 1/2"		3 1/4"		10"	Bronze / Phenolic
70mm		90mm		280mm		Bronze / Phenolic
70mm			3 1/2"		11"	Bronze / Phenolic
	2 3/4"		3 1/2"		11"	Bronze / Phenolic
80mm		100mm		320mm		Bronze / Phenolic
80mm			4"		12"	Bronze / Phenolic
	3"		4"		12"	Bronze / Phenolic
90mm		110mm		360mm		Bronze / Phenolic
	3 1/2"		4 1/2"		14"	Bronze / Phenolic
100mm		125mm		400mm		Bronze / Phenolic
	4"		5"		16"	Bronze / Phenolic

Please contact us for further information and prices.

Flexible shaft couplings

These assemblies have steel stern tubes for installation into steel vessels and may be welded into place. The stern tube is provided with a dual shaft seal and lubrication is ensured by means of raw water, without use of grease or oil.

Propshaft: Diameter	Material	Standard lengths (mm)	Taper length (mm)	Propeller nut
25mm	Stainless steel 1-4462	1000/1500/2000/2500 longer lengths to order	55	M16x1.5
30mm	Stainless steel 1-4462	1000/1500/2000/2500 longer lengths to order	75	M20x1.5
35mm	Stainless steel 1-4462	To order	85	M24x2
40mm	Stainless steel 1-4462	To order	95	M24x2
45mm	Stainless steel 1-4462	To order	105	M30x2
50mm	Stainless steel 1-4462	To order	115	M36x3

Sterntube	Material	Standard lengths (mm)	Outer diameter (mm)	Length behind tube (mm)
For 25mm propshaft	Steel	To order	51	8
For 30mm propshaft	Steel	To order	54	10
For 35mm propshaft	Steel	To order	60	10
For 40mm propshaft	Steel	To order	63.5	12
For 45mm propshaft	Steel	To order	70	12
For 50mm propshaft	Steel	To order	76	15

Note: all specifications are subject to change without notice. Please contact us for details of prices and any further information, full details are available in the current Vetus catalogue which you can request online.