Power Locks & Keyless Locking Devices
Friction shaft-hub connections — precision-ground alloy steel locking assemblies with zero backlash and infinite angular adjustability.
Built to your drawing, to your standard
Power locks eliminate the failure modes of keyed connections — stress-concentration cracks, fretting corrosion and keyway hammering — through concentric tapered rings drawn together to create uniform 100-200 MPa radial clamping pressure around the shaft.
MACHINING Force power locks are precision-ground on all contact surfaces and manufactured from high-grade 42CrMo4 alloy steel with Grade 12.9 locking screws and anti-friction coatings on threads and mating surfaces — delivering consistent clamping force and torque capacity through millions of cycles.
- 42CrMo4, C45, 304/316 stainless steel bodies
- 6 mm – 600 mm shaft diameter
- 15 Nm – 1,800,000 Nm torque capacity
- 100-200 MPa clamping pressure
- 0.01-0.03 mm TIR concentricity when installed
- Grade 12.9 socket head cap screws
Why engineers specify Force Machining
42CrMo4, C45, 304/316 stainless
Engineered and verified in-house so field performance matches drawing intent.
6 mm
600 mm shaft diameter
15 Nm
1,800,000 Nm torque capacity
100
200 MPa clamping pressure
0.01
0.03 mm TIR concentricity when installed
Grade 12.9 socket head
Engineered and verified in-house so field performance matches drawing intent.
Typical technical envelope
Full material grades, dimensional envelope, load capacity and finish options are listed on the dedicated specifications page.
Where these parts perform
- Wind turbine main shaft & gearbox
- Mining conveyor drive pulleys
- Marine propulsion & propeller hubs
- Hollow-shaft industrial gearboxes
- Test stands & dynamometers
- Hydraulic pump & motor shafts
- Paper mill roll & calendar shafts
- Servo encoder & feedback mounting
Headline performance figures
Certified metallurgy at every heat
Every bar and blank arrives with a mill certificate. We match material grade to service duty — from general-purpose carbon steel to corrosion-resistant stainless and high-fatigue alloys.
42CrMo4 alloy steel
Sourced from certified mills with EN 10204 3.1 material certificates on request.
C45 carbon steel
Sourced from certified mills with EN 10204 3.1 material certificates on request.
304/316 stainless steel
Sourced from certified mills with EN 10204 3.1 material certificates on request.
From drawing to inspected part
Engineering & DFM Review
Our application engineers review your 2D drawing or 3D STEP model, run a design-for-manufacture study, and recommend material grade, heat treatment and surface finish to meet the specified duty cycle at the lowest landed cost.
Precision Manufacturing
CNC turning, 3–5 axis milling, cylindrical and internal grinding, gear hobbing, induction and case hardening — all performed in-house on calibrated equipment under IATF 16949-aligned process control.
Quality Verification
Statistical process control on critical dimensions, first-article (FAI/PPAP) approval, CMM traceable measurement, Rockwell/Brinell hardness mapping and Ra surface-roughness verification per ISO 9001:2015.
Preservation & Dispatch
VCI oil, desiccant sachet and heat-sealed PE for corrosion protection; ISPM-15 fumigation-free plywood cases; barcode labelling and pre-cleared export documentation for door-to-door delivery.
Trusted across demanding sectors
Our parts run inside gearboxes, drivelines and finished machinery for OEMs in a dozen industries — supported by full traceability and consistent global delivery.
Six layers of verification
Every batch passes chemistry, dimension, hardness, balance, finish and NDT gates before it leaves the plant.
Material Certification (EN 10204 3.1)
Every heat is verified by optical emission spectrometry against the ordered grade. Certified mill test reports (MTC) accompany each shipment and are archived for ten years for full lot-to-lot traceability.
Dimensional Inspection (CMM & FAI)
Zeiss and Mitutoyo coordinate measuring machines verify GD&T callouts to ISO 1101. First-article inspection (FAI) and PPAP Level 3 packages are issued for automotive and safety-critical parts on request.
Hardness & Metallurgical Analysis
Rockwell (HRC), Brinell (HB) and micro-Vickers hardness maps confirm case depth and core properties. Metallographic sections are examined at 100–500× for grain size, phase distribution and inclusion rating.
Dynamic Balancing (ISO 1940)
Rotating components — pulleys, sheaves and gears above 1,800 RPM — are dynamic-balanced to G6.3 as standard, with G2.5 available for high-speed drives. Residual unbalance is reported in g·mm per plane.
Surface Finish & Coating Verification
Contact and non-contact Ra/Rz measurement, coating thickness by magnetic and eddy-current gauge, adhesion by cross-cut, and 500–1,000 h salt-spray corrosion testing per ASTM B117 on plated and painted parts.
Non-Destructive Testing (NDT)
Magnetic particle (MPI), liquid dye penetrant (LPI) and ultrasonic (UT) inspection by ASNT Level II operators. Radiographic (RT) inspection subcontracted to accredited third-party labs when required.
Export-grade packaging
- VCI film wrap and rust-inhibitor oil protect machined surfaces for up to 12 months of storage or transit
- Individual foam, corrugated dividers or moulded PE cradles isolate parts from impact and abrasion
- Fumigation-free plywood cases certified to ISPM-15 accepted at every major port worldwide
- Barcode labels, part-number marking and customer-branded packaging (private label) available on request
- Loose, bulk, palletised or kitted assemblies — packed to your inbound receiving specification
Global shipping desk
- Incoterms 2020: FOB Shanghai / Ningbo / Qingdao standard, with EXW, CIF, CFR, DDP and DAP on request
- Air freight, sea LCL and FCL, and China–Europe rail coordinated in-house — no forwarder hand-offs
- Full export document set — Certificate of Origin (CO / Form A / FTA), packing list, commercial invoice, B/L and material test certificate
- Delivered to 40+ countries; established freight lanes to Germany, USA, Italy, Poland, Türkiye, Brazil, Mexico and Australia
- Real-time shipment tracking and consolidated container loading for multi-SKU orders
Datasheets and inspection templates
Answers before you ask
The questions our sales engineers hear most often. Missing something? Message us — a real engineer replies within one business day.
Variants engineered for every drive
Self-Centering Power Lock
Standard industrial keyless assembly with concentric inner and outer rings on mating tapered surfaces — high torque capacity with self-centering action.
Learn moreShrink Disc Assembly
Two- or three-piece assembly using a separate outer shrink disc to compress a slotted inner ring onto the shaft. Ideal for hollow-shaft gearbox connections.
Learn moreKeyless Locking Device with Integrated Flange
Combines a shaft locking assembly with an integral mounting flange bolted directly to the driven component, eliminating a separate hub.
Learn moreSplit Inner Ring Power Lock
Split inner ring installable after the outer assembly is in place — for confined-space mounting or shafts that cannot be end-loaded.
Learn moreStainless Steel Power Lock
304 or 316 stainless throughout for food processing, pharmaceutical, marine and chemical environments, with anti-galling screw coating.
Learn moreCompact Shaft Lock
Shortened, reduced-diameter design for small (6-30 mm) shafts on encoders, resolvers, small servo motors and precision instrument drives.
Learn moreExplore adjacent product families
From the engineering desk
Industrial Materials — The Selection Guide
Match cast iron, carbon steel, alloy steel, stainless and nickel alloys to mechanical, corrosion and thermal duty.
ReadCNC Machining — A Buyer's Guide
3-axis vs 4- vs 5-axis, realistic tolerance envelopes, and how to write a drawing that quotes low.
ReadIndustrial Inspection Methods
CMM, spectrometer, hardness, NDT and balancing — what each proves and when to specify it.
ReadRequest a Quote
Send drawings, target quantities and material grade. Firm pricing back within one business day.
Download Catalogue
Complete range, material grades, dimensional envelope and load ratings — the working PDF our engineers use.
Contact Sales
Prefer a call? Book a slot with a sales engineer for spec review and lead-time planning.
Get pricing and lead time
Share drawings, materials and target quantities — a real engineer replies.
Ready to work with Force Machining?
Send drawings, specs or a rough idea — our engineers get back within one business day.