
Cutting Tools for Shipbuilding
Tooling sized for shipbuilding.
Marine gearboxes, propulsion shafts, deck hydraulics — JIAYI gear cutters, deep-hole drills and large port tools handle the oversized parts and tough alloys of marine manufacturing.
The challenge
Marine parts are among the largest a machine shop will ever see — gearbox cases, propeller shafts, rudder actuators — machined from manganese steels and duplex stainless that eat ordinary tooling. Bores run deep, threads run large, and hydraulic valve blocks scale up with the vessel. Everything about the work is oversized except the tolerance for error.
JIAYI solutions for shipbuilding
Gear Cutting Tools
Small- and large-module gear tools for marine gearbox cases and power-transmission gearing.
Deep-Hole Drills
For propulsion shafts, rudder stocks and long hydraulic bores.
Large Cavity & Port Tools
Cavity and port tools scaled for oversized hydraulic valve blocks and deck machinery.
Milling Cutters
Heavy milling for large housings, flanges and structural marine parts.
Typical parts & materials
- Marine gearbox casescast steels, alloy steels
- Propulsion shafts & rudder stocksforged steels, stainless
- Winch & deck hydraulicssteels, ductile iron
- Large hydraulic valve blockssteel, ductile iron

Why JIAYI for shipbuilding
- 01
Large-module gear tooling for marine-scale gearing.
- 02
Deep-hole drills built for long bores in shaft work.
- 03
Cavity and port tools that scale to oversized hydraulic blocks.
- 04
Custom large tools ground to your part print.
Custom tooling in 3 steps
- 1
Send your drawings
Part print, material and size requirements.
- 2
Engineering review
We confirm large-tool feasibility and propose geometry.
- 3
Quote & build
Priced proposal, then production to your print.
Machining something too big for catalog tooling?
Send the drawing. We build large tools to print.