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TAIL SHAFTS
Marine Tail Shaft Assemblies, Couplings and Sealing Interfaces
A tail shaft must match the gearbox connection, stern gear, propeller hub and vessel installation. ERBA Marine coordinates complete or replacement supply from verified dimensions, material and interface details.
Published production capability includes shafts up to 250 mm diameter and 10 m length, subject to project review.
Machined to verified interfaces
Tail shafts, couplings, keys and retention hardware coordinated as a complete assembly.
ERBA-Managed Supply
Technical clarification, quotation and supply through ERBA Marine.
Drawing-Led Review
Interfaces checked from verified project information.
Newbuild & Replacement
Support for planned projects, refits and replacement scopes.
GCC Coordination
Regional commercial and delivery coordination.
TAIL SHAFT SCOPE
From gearbox coupling to propeller-end hardware.
Complete assembly or individual replacement components can be reviewed from a drawing or verified dimensional survey.
Complete Tail Shaft Assemblies
Project shafts coordinated with propeller taper, keyway, nut, coupling interface and overall installation length.
- Straightened, ground and CNC machined
- 20-100 mm and 3/4-4 in standard ranges published
- Larger project capability available
Marine Shaft Couplings
Forged-steel couplings machined around the gearbox output flange, shaft bore, bolt pattern and transmitted duty.
- Gearbox flange data required
- Fit and bore confirmed
- Standalone or assembly supply
Shaft Sealing Interfaces
Project-specific sealing routes reviewed against shaft diameter, stern tube, space and operating environment.
- Seal type confirmed per project
- Stern tube interface checked
- No automatic inclusion unless quoted
Keys, Nuts & Retention Parts
Matching keys, propeller nuts and locking arrangements supplied with the shaft or as confirmed replacements.
- Thread and taper verified
- Mating component data required
- Material agreed before supply
MATERIALS AND MACHINING
Shaft material and fit are part of one technical decision.
Published material routes include stainless steel 304, stainless steel 316L and duplex S32750. Final grade, dimensions and inspection scope are confirmed per project.
Propeller-end interface
The taper, keyway, thread and retention arrangement must match the propeller hub.
- Hub bore and taper
- Key and keyway
- Nut and locking details
Gearbox-end interface
The coupling is matched from verified gearbox and shaft data.
- Output flange dimensions
- Bolt pattern and register
- Shaft bore, fit and transmitted duty
TECHNICAL ENQUIRY CHECKLIST
What to send for a useful propulsion review.
Complete information reduces unnecessary clarification and helps ERBA Marine prepare a more accurate technical and commercial response.
Vessel & machinery
- Engine and gearbox make/model
- Gearbox output flange dimensions and bolt pattern
- Shaft diameter, overall length and material
- Propeller hub bore, taper and keyway
- Propeller-end thread, nut and locking details
Dimensions & project scope
- Existing stern tube, bearing and seal arrangement
- Shaft rotation and transmitted duty
- Coupling type, fit and installation space
- Existing shaft drawing or verified survey
- Quantity, documentation and delivery date
PROJECT PROCESS
A clear route from enquiry to coordinated supply.
Custom and replacement propulsion equipment benefits from documented technical checkpoints.
PROCESS
1. Send the project data
Share vessel, machinery, dimensions, photos, drawings and required scope.
PROCESS
2. Clarify the interfaces
ERBA Marine identifies missing inputs and checks connected components.
PROCESS
3. Confirm the proposal
Configuration, materials, documentation, commercial terms and delivery are agreed.
PROCESS
4. Coordinate supply
ERBA Marine remains the customer-facing contact through the confirmed supply scope.
Important: Published examples describe available solution routes. Final dimensions, materials, tolerances, class or inspection scope, price and delivery are confirmed only in ERBA Marine’s written quotation.
FREQUENTLY ASKED QUESTIONS
Tail Shaft Assemblies FAQs
Practical answers for selection, replacement and project planning.
Yes. A coordinated scope can include the shaft, coupling, key, nut and related retention components when all mating dimensions are confirmed.
A replacement can be reviewed from an accurate drawing or dimensional survey. Material, fits, tapers, keyways, threads and flange details must be verified before production.
Provide gearbox make and model, reduction ratio, output rotation, flange drawing or measurements, bolt pattern and any available installation drawing.
Yes, provided shaft diameter, fit, bore, flange dimensions, bolt pattern and mating gearbox details are confirmed.
Only when included in the confirmed scope. The seal type and size must be reviewed against the shaft, stern tube and available installation space.
PROJECT-SPECIFIC ENQUIRY
Request an ERBA Marine Tail Shaft Assemblies review.
Send the strongest available technical information. ERBA Marine will review the requirement and identify any missing dimensions or interfaces before quotation.
- Attach drawings and clear photographs.
- State known dimensions and operating concerns.
- Declare class, inspection or documentation needs early.
- Final scope is confirmed in writing before supply.
Send Tail Shaft Requirements
Fields marked * are required. Drawings and photographs are strongly recommended for replacements.
Your technical and contact information is sent only to ERBA Marine’s website enquiry recipients for follow-up.