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Bollinger Shipyard's Machine/Hydraulic Shops are full service machining facilities with line boring capabilities. They are equipped with computer controlled technology in the manufacture, repair and reconditioning of propeller shafts, stern tubes, bow and stern thrusters, chemical pumps, rudders and other underwater gear. Bollinger has five ABS approved welding procedures used in the manufacturing and repair of shafts.
Bollinger's Quick Repair machine shop outside of New Orleans, LA USA, covers over 32,000 sq. ft. and is among the largest and best equipped machine shops in the nation. It features lathes swinging 32" over the carriage, and 52' between centers and vertical and horizontal boring mills with capacities up to 18'2" in diameter.
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This high performance second generation Duplex stainless alloy is recommended as having one of the finest combinations of properties for propeller shafting and is highly competitive in price. The alloy has excellent corrosion fatigue resistance properties, and combined with high strength and ductility, enables the use of comparatively smaller shaft diameters. The consequent reduction in weight, and size of associated gear offers improved boat performance and economy of installation and boat operation.
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The main problem in the design phase of a shaft is to confer minimum vibration and enough mechanical strength to ensure the safety of the system in any condition.
The propeller shaft, which is developed in a single dimension, is subject to torsion even at high rpm, and it is here that our company demonstrates its technological potential.
We make shafts on NC lathes that, in the bigger diameters, allow for the best degree of precision.
This translates into a perfect response to design data and the final product delivered to the client. Perfectly aligned shafts are an indispensable condition for a low level of vibration and the longevity of the installation.
Our production of propeller shafts includes a range from 25 to 205 mm diameter and over 7 m in length. We use AISI 304, AISI 316, V174, and MARINOX 25 stainless steel.
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AVAILABLE DIAMETERS FROM DIAM. 3/4" TO DIAM. 8", ALL LENGHTS AVAILABLE UP TO 12 CM, ALL SURVEYS BUREAU VERITAS, LLOYD'S REGISTER, ..
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The Evolution Marine Shaft System (EMSS) is a complete shaft system from engine to propeller. It's comprised of two major components: 1) the "oil-lubricated section" containing a '22' allow stainless steel shaft enclosed in a 316L stainless steel shaft log tube with aft bearing housing and forward thrust bearing housing, and 2) the internal connecting shaft with a splined slip joint and flexible joints at each end.
Other system components include the engine adapter, mounting flanges, and monitor tank with its fittings and hoses.
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For use with less powerful engines, VETUS have designed and developed a shaft assembly - with shaft diameters of 0 25 mm and G 30 mm - which can be installed with a minimum of fuss. Machining, threading and keyway cutting have all been taken care of by VETUS. 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. These propeller shaft assemblies feature a propeller nut with integrated zinc anode
as standard supply
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The Tides Marine Spare Seal Carrier Kit is used in conjunction with the Tides Marine SureSeal dripless propeller shaft system.
It provides a convenient way of storing a replacement lip seal on the propeller shaft during installation of the SureSeal.
This allows the change of a damaged or worn lip seal without uncoupling the shaft from the transmission.
If necessary the lip seal can be replaced with the craft afloat.
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Clementsmarine use a high precision, proprietry range of water lubricated marine rubber bearings, commonly known as Cutless Bearings. These have proven suitable and hard wearing for all applications in our range of products.
The exceptional properties of nitrile rubber as a bearing material, combined with the high performance of the hydrodynamic water wedge design, make this product the automatic choice for reliable and maintenance free operation.
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The Tides Marine seriesOne shaft seal is a water lubricated dripless shaft seal system designed for use on smaller vessels with stainless steel propeller shafts.
Suitable for imperial and metric shaft diameters between 0.75"/22mm to 1.25"/30mm with a wide range of stern tube attachment hoses available.
Tides Marine seriesOne shaft seals are suitable for yachts, work boats and high speed ski boats due to the wide operating range of the product.
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Tides Marine SureSeal is the market leader in dripless propeller shaft sealing systems. SureSeal has become an industry standard fit on many production-built power boats, yachts and commercial craft around the world.
The Tides Marine SureSeal system is a water tight, self aligning shaft seal housing connected to the stern tube by a flexible silicon hose.
Manufactured for imperial and metric shaft diameters of 1.375"/35mm to 8"/200mm with hose options to suit a wide range of stern tube diameters.
Tides Marine SureSeal has Ameican Bureau of Shipping and Lloyds Register Type Approval certification.
Suitable for new build and retrofit applications in all types of shaft drive vessels.
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We have a vast range of water lubricated bearings for shafts in centimeters and inches with an exterior sheath in bronze or resin up to a shaft diameter of 205 mm. Water lubricant in addition to being economical, is constantly available and allow us to reduce attrition at low rpm and assure maximum durability. Remember that all models up to a diameter of 125 mm are available in stock.
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Seals have been developed to operate on propeller shafts of small, medium and large size boats where a high level of reliability is required.
The special design allows large axial displacement and the use of suitable material guarantees as well as high resistance to corrosion and high mechanical resistance to withstand stresses produced by vibrations.
The installation of mechanical seals in this particular field has solved problems such as corrosion during long periods of inactivity and shaft damage caused by traditional stuffing boxes. Power absorption is considerably reduced as well.
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FRANCE HELICES HAS DEVELOPPED A COMPLETE RANGE OF STUFFING BOXES FOR EVERY KIND OF BOATS :
-YACHTS
-SAILING BOATS
-PLEASURE BOATS
-FISHING BOATS
STUFFING BOX IS MADE OF MARINE BRONZE AND IS HIGHLY CORRODING PROOF.
A COMPLETE SCOPE OF SUPPLY IS COMPOSED OF A PRE-CUTTED AND AJUSTED TEFLON BRAID, A FLEXIBLE REINFORCED HOSE, A NON-OXIDING FIXING COLLAR, AND METRIC STAINLESS STEEL BOLTS.
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Seals have been developed to operate on propeller shafts of small, medium and large size boats where a high level of reliability is required.
The special design allows large axial displacement and the use of suitable material guarantees as well as high resistance to corrosion and high mechanical resistance to withstand stresses produced by vibrations.
The installation of mechanical seals in this particular field has solved problems such as corrosion during long periods of inactivity and shaft damage caused by traditional stuffing boxes. Power absorption is considerably reduced as well.
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The use of face seals allows us to resolve the typical problems in which, over time, the installation of the traditional stuffing box incurs, that is wear on the shaft, wet bilge and continuous tightening of the packing, etc. Schematically, the face seal is made up of two parts: one that is stationary and one that rotates. The stationary part is generally fixed to the packing box; the rotating part is fixed to the shaft and turns with it. Thus there is no wear on the shaft: in fact the true seal is found perpendicular to the shaft in two micro lapped surfaces that rub against one another. The elastic bellows or springs recuperate eventual surface wear, thus the constant tightening of the packing is not required. Moreover, the presence of bellows and/or springs, in addition to recuperating wear, serves to compensate eventual misalignment, absorbing vibrations or sudden shifts of the shaft.
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The PSS Shaft Seal, manufactured for 25 years, uses the well-known system of mechanical seal in order to assure complete water tightness between the propeller shaft and the boat, unlike other brand which uses either a lip seal or a packing gland.
Because of its choice of material, the PSS Shaft Seal can operate in all kind of environment, including salty/sandy waters. Also unlike other type of seals there is no contact, therefore no wear, between the sealing surface and the shaft.
All these qualities make the PSS Shaft Seal the most common brand of Shaft Seals found on the pleasure boat industry today.
Less known is the fact that the PSS Shaft Seals are also very common on all type of work boats (Small ferries, crew boats, fishing boats, coast guards, tugs etc…) as these seals are manufactured for shafts up to 200mm. One huge advantage of these seals on a commercial boat is the lack of maintenance required added to the fact that these seal do not wear the shaft down.
The PSS is approved by RINA, VERITAS, and ABS.
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The PSS Shaft Seal, large model, manufactured for 15 years, uses the well-known system of mechanical seal in order to assure complete water tightness between the propeller shaft and the boat, unlike other brand which uses either a lip seal or a packing gland.
Because of its choice of material, the PSS Shaft Seal can operate in all kind of environment, including salty/sandy waters. Also unlike other type of seals there is no contact, therefore no wear, between the sealing surface and the shaft.
All these qualities make the PSS Shaft Seal the most common brand of Shaft Seals found on the pleasure boat industry today.
Less known is the fact that the PSS Shaft Seals are also very common on all type of work boats (Small ferries, crew boats, fishing boats, coast guards, tugs etc…) as these seals are manufactured for shafts up to 200mm. A big endorsment is the fact that the US Coast Guards use the PSS Shaft Seal. One huge advantage of these seals on a commercial boat is the lack of maintenance required added to the fact that these seal do not wear the shaft down.
The PSS is approved by RINA, VERITAS, and ABS.
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Bronze dripless shaft seal with nitrile seal element. Available in sizes 1" to 3". Chatfield Blue Water seals are Germanischer Lloyd approved.
Chatfield Marine has developed a propeller shaft flexible seal unit designed to be retrofitted to existing stern tube assemblies or installed in new boats— the Blue Water Seal. This is a proven system that is NZ MSA approved for use in commercial boats and is now used as standard equipment by well known boat builders.
The seal element can be easily removed should it be damaged or need replacing with no need to replace the entire unit as new seals elements are readily available from our spare parts department
The Blue Water Seal has a built-in safety feature to keep sea water out of the boat. If the seal element is damaged the seal retaining plate can be converted into a gland follower by placing a ring of greasy hemp gland packing under it to form an effective temporary seal allowing a replacement to be fitted at leisure.
These water cooled units are manufactured from cast admiralty bronze, chosen for its excellent bearing and salt water resistant properties. They are available for 25-76mm (1”- 3”) shaft diameters.
Enquire now - we courier worldwide
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Complementing the more conventional shaft seals that are still widely used in the industry, Clements Marine principally recommend a complete range of non-metallic self-aligning shaft seals designed and produced by Tides Marine Inc in the U.S.A.
This innovative seal has become widely used recently in the UK leisure boat design by a number of the large builders. These seals have many performance enhancing characteristics but specifically their dripless and wear free performance over a guaranteed 2000 hour, or two year operating life. The components are manufactured using non-metallic composite materials which are dimensionally un-affected by temperature changes and will not become damaged by water absorbtion.
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The Tides Marine SmartSeal temperature monitoring system has been developed for the Tides Marine SureSeal dripless propeller shaft seal.
Designed to monitor the temperature of the seal head and then provide an audible and visual alarm if an excessive rise in operating temperature occurs.
The system is suitable for 12v DC or 24v DC and can be retro-fitted to existing SureSeal units already installed.
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If your yacht is fitted with a hydraulic gearbox and the propeller continues to rotate when under sail with the engine turned off, it is likely that the gearbox will not be sufficiently lubricated. Autolock has been developed to solve this problem and provides the following significant advantages:-
- Stops prop rotation when sailing.
- Reduces gearbox wear.
- Reduces prop drag.
- Stops cruising prop noise.
- Manufactured from stainless steel and other non-corrosive materials.
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At GUK Manufacturing we supply
Marine Rope Cutters manufactured from high grade(BS970-316) Stainless Steel a powerful and effective solution for retail and commercial clients.
* Suitable for commercial and leisure vessels
* British design and engineering
* 5 year guarantee against faulty materials & workmanship
* Clamp-On to fit shaft sizes 20mm (3/4") - 130mm (5")
* Slide-On to fit shaft sizes 20mm (3/4") - 50mm (2")
* Clamp-On version available for underwater fitting
* No moving parts to service or fail
* Cutting action avoids vibrations/shocks often associated with "chopping" style cutters
* Over 13,000 fitted worldwide
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The stripper protects your propeller. It keeps your propeller clear of rubbish by shredding it into harmless fragments. The stripper is an assembly of rotating cutting blades that interlock around the shaft in front of the propeller. A fixed blade runs in bearing integral with the rotating cutter resulting in a shearing action as the blades pass each other. The patented shape of the blades puts real strength at the base where it's needed. The needle sharp teeth extend in an elegant outward curve to the very tips of the blade. This results in a cutting action that is smoothest possible. Even a low powered engine can cut through large ropes easily.
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The simplest way to keep your propeller and shaft free from fouling ropes and submerged debris, the Shaft Razor Cutter has been tested and marketed in Europe for several years and is now available through The Evolution Company Inc. The Shaft Razor Cutter can be installed where there is little space on the shaft
The Shaft Razor Cutter consists of a machined circular blade manufactured from a high grade of stainless steel (316L) with a sharp serrated cutting edge. It is accurately machined to the shaft diameter and kept securely in place by set screws to the shaft. Once installed, the Shaft Razor Cutter rotates with the shaft and gently cuts anything that becomes entangled on the shaft/propeller. installation consists of simply removing the propeller and sliding the Shaft Razor Cutter onto the shaft and tightening the set-screws.
The Shaft Razor Cutter can be installed where there is little space on the shaft.
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Clements Marine offer a complete range of steel half couplings and adapters. These can be manufactured with tapered or parallel bores, and with male or female gearbox output flange fitting to suit the individual installation. Split couplings are also available with scalloped flanges that enable the removal of clutch parts with the coupling in situ.
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The Evolution Flexible Shaft Coupling (EFSC) solves misalignment, absorbs and dampens shock loads and shaft vibrations, prolongs the life of machinery, and isolates metal-to-metal for quietness.
The EFSC is comprised of four major components: 1) a spool flange machined to bolt directly to the reduction flange; 2) a large circular rubber flex joint that's replaceable; 3) a split flange coupling for the shaft with pinch bolts, set bolts, and keyway; 4) a retainer cover that serves to protect the rubber flex joint, capture all bolts, and improve overall strength of the unit.
The Evolution Flexible Shaft Coupling uses quality construction and few parts and is easily installed.
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