Rate contract for repair of Stern Gear/Propeller System of ferry boats

Reconditioning of propeller fans by rebuilding, machining, grinding etc., correcting variation in pitch on pitchmotor and static balancing.

c) Any other propeller of bigger size

Providing internal bore, matching taper into propeller with suitable key way bedding and fitting.

Rebuilding of S.S. Shaft abot 8ft long by welding at stuffing box and journal region and matching to size after truing for size, including removing of bend before machinery.

Machining, providing and fitting keys on propeller shaft

b) Brass

Machining providing key way on

b) Propeller fan

b) Propeller shaft

c) M.S Propeller shaft coupling

Blinding of old key way on propeller shaft by welding and machining the same.

a) machining the same

Repair of taper on propeller shaft and coupling by Machining

a) Machining external threads on propeller shaft ends

b) Taper turning by cutting to length or otherwise on S. S. Propeller shaft to specified taper.

Repairs of propeller shaft threads by machining.

Machining providing and fitting of new cast steel propeller shaft coupling complete with key way spigot etc. for all propeller shaft.

Machining providing and fitting of M.S distance pieces.

Repair of distance piece for propeller shaft coupling by welding spigot bore and machining to size.

Providing and fitting of new coupling retaining brass nut with additional check nut or

suitable locking arrangement for propeller sahft

Providing and fitting of propeller fan retaining brass castle nut.

Providing and fitting of brass spilit pin 3/16" x 3" for brass nut.

Turning of O/D of S. S. Shaft per CM3

Providing of new S. S. Shaft with supplied material with suitable taper on both ends for propeller and shft coupling along with threading, key ways and drilling of hole, for lock pin at each propeller.

Providing and fixing of M.S. material 14mm flanges with 4 holes to suit 5/8 bolts, on to M.S casing of (109 ID 141 OD) supplied by Department (one of the flanges to be welded and other supplied loose) This is a stern tube arrangement for ferries.

Providing of S. S. Nut and bolt of 5/8 x 3" with check nut 8 Nos.

Providing of a cast steel shaft coupling (driven half coupling) machined to exact profile and @ about 1" Dia pilot born. The coupling should be suitable for use with Greaves Make reserve reduction gear box, M-300, reduction ratio 3:1

Machining and providing of 70 mm diameter cut shaft with 19mm thick, 2 welded end flanges, having male and female spigot, sutably drilled to admit 6 bolts of 1/2" diameter on each flange, on correct P.C.D., of standard shaft coupling (Rate to be quoted per shaft)

a) Length upto - 12"

a) Length upto - 18"