Rotary Actuator Factory Tour – Machining to Test

At a glance

The machine park — built around the spline

Helical rotary actuators live or die on their spline set. Our line-up is arranged around it: whirling-milling and gear cutting for the splines, vertical lathes for the big flanges, Swiss lathes for the small shafts, machining centers for the housings.

33photos, no stock shots

7process stages

9machine groups

1site, Weihai

01 — The site & raw material

Buildings & yard

Workshop building — welding, finishing and dispatch.

Office and engineering building — Office & engineering block.

Raw material warehouse — Raw-material yard — steel bar and tube stock, full mill-certificate traceability.

02 — Turning

CNC turning & milling lines

Turning centers arranged in flow lines, overhead crane coverage — spline grinding and finish machining run in-house, not outsourced. See the full machine park.

CNC machining shop with turning centers — Machining shop — turning centers in flow-line arrangement, batch work on the floor.

Wide view of CNC workshop with overhead crane — Full workshop view — overhead crane spans the machining hall.

Vertical turning

Big flanges, one chucking

Neway VNL80S vertical CNC lathe — Neway VNL80S vertical lathe — big-flange turning in a single chucking.

Doosan PUMA V8305 vertical CNC lathe — Doosan PUMA V8305 vertical lathe with batch work at the door.

Turning & Swiss lathes

Shafts, pistons, pins

Tornos Swiss-type lathes with bar feeders — Tornos SwissDT 26 Swiss-type lathes with bar feeders — small spline shafts and pins, unattended.

Row of slant-bed CNC lathes — Slant-bed CNC turning line for shafts and pistons.

Operator running Hision CNC lathe — Hision lathe running batch turning — nut bodies and sleeves.

03 — Spline & gear cutting

Where the helical spline is born

Whirling-milling cuts the multi-start helical spline in one clamping — this is the process most competitors outsource, and the reason our spline sets stay matched from blank to assembly.

CNC whirling milling machine for helical splines — CNC whirling mill (ZRD80WA) — the core process: helical spline whirling-milling in one setup.

CNC gear cutting machine with helical gears — CNC gear machine (YK8130) cutting helical gear sets — ring gears and pistons in production.

Core components

The helical spline set

Output shaft, piston and ring gear — the three parts that decide an actuator's life. Finish-ground here, batch-labeled, batch-traceable.

Helical spline set: shaft, piston and ring gear — Spline set — shaft, piston and ring gear, finish-ground in-house.

Machined helical piston and shaft components — Close-up of the helical piston — multi-start spline, ground finish.

Matched set of helical spline components — Matched spline sets ready for assembly — kept together from grinding to build.

Machined parts with batch identity labels — Batch identity cards on every lot — part number, operation and quantity logged.

04 — Machining centers

Housings, end caps, valve blocks

Doosan DNM 5705 vertical machining center — Doosan DNM 5705 machining center — housing and end-cap milling.

Sino VMC1060 and Doosan machining centers — Machining-center row: Sino VMC1060, Doosan — valve-block faces and port machining.

Operator at JM-1160 machining center — JM-1160 in cycle — first-article parts staged at the door.

Heavy & supporting machines

The rest of the floor

Horizontal machining center with crane-served pallets — Horizontal machining center — four-side machining of housings in one setup.

Radial drilling machines for supporting operations — Radial drills for supporting operations and fixture work.

05 — Inspection & metrology

Measured, not assumed

First articles, batch samples and custom prototypes are verified on the CMM and contour machine before they reach the test rig — spline profiles, flange run-out, port positions, bore sizes. Reports ship with every custom order.

Brown and Sharpe CMM measuring a helical spline shaft — CMM (Brown & Sharpe, 1210×1212×1200 mm) — full-dimension report on spline shafts and housings.

Mitutoyo Contracer CV2000 contour measuring machine — Contour measuring machine (Mitutoyo Contracer CV2000) — spline profile and lead verification.

Spline lead checked tooth-by-tooth — profile, lead and surface finish logged per batch.

06 — Assembly & test

Where every unit proves itself

Final assembly bench — Final assembly — flange bolts torque-checked to spec.

Pressure and function test rig — Pressure & function test rig — every unit cycled and logged.

Conveyor paint line — Paint line — conveyor coating, tropical-grade protection on request.

Finished actuators after final test — Tested units awaiting final inspection and boxing.

07 — Warehouses & stock

Zoned stock, ready to ship

Bin locations across parts, semi-finished and finished-goods stores — this is what "ex-stock dispatch" actually looks like. Replacement units for the L10 / L20 / L30 ladder are held as semi-finished and finished stock.

Parts warehouse with zoned racks — Parts store — zoned racks (A/B/C zones) of machined components.

Detail of parts bins with labels — Bin-level labels — pick by part number, count by batch card.

Semi-finished goods warehouse — Semi-finished store — cylinders and sub-assemblies staged for final build.

Finished goods warehouse — Finished-goods store — boxed and crated actuators ready for dispatch.

Machine list

What we run, by process

Process	Machine type	Makes on the floor
Helical spline whirling-milling	CNC thread whirling machine	ZRD80WA and up
Gear cutting / skiving	Gear hobbing machine / CNC gear skiving machine	YK8130 series
Vertical turning (big flanges)	CNC vertical turning lathe (VTL)	Doosan PUMA V8305, Neway VNL80S
Slant-bed turning	Slant-bed CNC lathe	Haitian line, Hision
Swiss-type turning (small shafts)	CNC Swiss-type lathe	Tornos SwissDT 26
Milling — vertical	Vertical machining center (VMC)	Doosan DNM 5705, Sino VMC1060, JM-1160
Milling — horizontal	Horizontal machining center (HMC)	Four-side HMC with pallet work
Cylindrical grinding	External cylindrical grinder	Finish grinding of shafts and pistons
Dimensional inspection	Coordinate measuring machine (CMM) / contour measuring instrument	Brown & Sharpe CMM (1210×1212×1200), Mitutoyo Contracer CV2000

Every machine carries a numbered equipment plate and maintenance log — third-party auditors can trace any serial-numbered unit back to the machine, the operator and the shift.

FAQ

About the works

Is Baishili a manufacturer or a trader?

A manufacturer. Machining, gear grinding, assembly, painting and 100% pressure and function testing happen under one roof, on a single site in Weihai, China — no trading and no outsourcing of core processes.

Are the helical splines made in-house?

Yes. The multi-start helical spline is whirling-milled in one clamping, ring gears and pistons are cut on a CNC gear machine, and each spline set is finish-ground and kept together as a matched set from grinding to assembly.

How is each actuator tested?

Every unit is cycled and logged on the pressure and function test rig before dispatch. First articles, batch samples and custom prototypes are also measured on the CMM and contour machine, and the reports ship with every custom order.

Can a unit be traced back to how it was made?

Yes. Every unit is serialized, and every machine carries a numbered equipment plate and maintenance log — auditors can trace any serial-numbered unit back to the machine, the operator and the shift.

Can we visit or inspect the factory?

Yes. Visitors and third-party inspections are welcome at the Weihai works.

Where is stock held for India?

Replacement units for the L10 / L20 / L30 ladder are held as semi-finished and finished stock at the works, and as ready stock in Bengaluru for pan-India dispatch in 3–7 days.