Submarine Refit

Our experienced radiation classified operators have carried out almost every conceivable machining operation possible during the manufacture, refit, DED, DAMP and CUP, of a range of different submarines, from 'O' class to 'Vanguard' class.

Specific services include:

Boring & Line Boring
• propulsion shaft housings
• hydro-plane bearing housings
• coupling bolt holes
• manway door hinges
• rudder taper boring
• engine crankshaft bearing
• housings
• hydraulic cylinder mountings
• hydraulic and electrical penetrations re-sleeved and re-machined back to original specification
• sea-water valve boring and facing (pre and post welding)
• torpedo tube bore grinding
• escape hatch elliptical boring & facing
• torpedo tube drains and vents bored and faced

Drilling, Tapping & Stud Removal
• tapping up to M64
• single point thread turning up
• to 300mm diameter (including periscope housing gland thread)
• removal of seized studs
• sea-water valve re-tapping
• hull pads drilled and tapped
• main ballast tank valve seats re-drilled and tapped
• hydraulic and electrical penetrations re-drilled and tapped (inboard and outboard)
• air passage connectors

Facing & Grinding
• pressure hull inserts
• pipework
• langes 25mm nb and
• upwards
• main ballast tank valve seats faced
• and ground
• hydraulic and electrical
• penetrations
• torpedo tube faces
• steam generator
• langes
• bursting discs
• hull pads

Shaft Turning
• motor shaft
• gearbox shaft
• tailshaft liner grooving

Milling
• hydroplane mating faces and
• keyways
• motor/compressor mounting pads
• shaft keyway cutting.

Laser Alignment
• flatness surveys
• shaft alignment
• bore alignment

In-house Machining
• full range of off site machining services available for refit