UNKW CSKW Keyway Universal Joint Coupling

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UNKW High-Precision Wear-Resistant Universal Joint Coupling | Large Torque Low Noise Single/Double Cross Cardan Shaft | 42CrMo Alloy Steel Keyway Coupler for FA Automation

Model Number
Check below, custom

Model	Type	Outer Diameter (mm)	Length (mm)	Inner Diameter (mm)
UNKA10	Single	20	42	10
UNKA12	Single	23	52	12
UNKA14	Single	25	59	14
UNKA16	Single	32	74	16
UNKA20	Single	36	87	20
UNKW10	Double	20	67.5	10
UNKW12	Double	23	83	12
UNKW14	Double	25	94.5	14
UNKW16	Double	32	117.5	16
UNKW20	Double	36	139	20

Product Description

Ultra-Precision Angular Drive: UNKW/CSKW Keyway Universal Joint Coupling

The UNKW / CSKW Series High-Precision Wear-Resistant Keyway Universal Joint Couplingis designed to deliver exceptional torsional performance and smooth motion control in modern factory automation (FA) systems, robotics, and heavy-duty industrial machinery. Engineered to connect shafts with notable angular and radial misalignments, this series features a robust single or double cross-joint structure that balances high-torque transmission with quiet, low-noise operation.

Machined from premium 42CrMo alloy steel and refined through advanced thermal treatment, the coupling body offers outstanding resistance to mechanical fatigue and repeated shock impacts. To ensure a tight, seamless fit on your motor and drive spindles, the internal bores are precision ground to a strict H7 tolerance boundary, achieving perfect concentricity and eliminating rotational backlash.

Core Product Advantages:

1, Premium 42CrMo Alloy Steel Composition: Built from structural-grade 42CrMo alloy steel subjected to specialized heat treatments, delivering high tensile strength, supreme toughness, and long-term fatigue resistance under sudden torque reversals.

2, Strict H7 Inner Bore Precision: The internal connection bores and keyways are machined to an exact H7 tolerance specification, ensuring high concentricity, precise dimensions, and a secure, wobble-free fit.

3, Large Angle Installation Compensation: Easily accommodates standard operational working angles up to 30° to 40° per joint, while providing a maximum physical mechanical limit angle of 45° to actively correct multi-axis angular and radial deviations.

4, High-Precision, Low-Noise Operation: Designed with minimal internal clearance and precise component matching to deliver smooth rotational kinetics, fast bi-directional response times, and whisper-quiet performance.

5, Single and Double Joint Versatility: Available in single cross-joint configurations for straightforward angular offsets, or double joint layouts to bridge parallel shaft misalignments and maintain steady constant velocity tracking.

6, Comprehensive Surface Protection Options: Shipped standard with a professional polished or black oxide finish. Can also be factory-customized with zinc plating or anti-friction nickel plating to match specific industrial environments.

7, Direct Factory Sourcing & Large Stock: As an FA factory automation standard component, we maintain a large inventory of conventional sizes for immediate dispatch, backed by full engineering support for non-standard custom drawings.

UNKW universal joint, CSKW keyway cardan coupling, high precision universal joint, 42CrMo cross shaft joint, low noise cardan coupler, H7 tolerance u-joint, single double cross joint assembly.

Attribute	Specification Details
Product Model Line	UNKW / CSKW Series (Keyway Precision Cardan Line)
Structural Engineering	Single or Double Cross-Joint Framework
Primary Base Metallurgy	High-Strength 42CrMo Alloy Steel (Optional 304 Stainless Steel)
Bore Machining Tolerance	Strict H7 Precision Grade Control
Standard Shaft Fixing	Precision Keyway Interface with Built-In Bearing & Fixed Pin
Standard Operating Angles	Smooth Performance up to 30° – 40°
Absolute Joint Angle Limit	Maximum 45° Angular Displacement per Joint
Acoustic Performance	Precision Coordinated Clearances for Low-Noise Operation
Rotational Tracking	Fast Clockwise and Counterclockwise Response Times
Surface Finish Choices	Polished, Black Oxide, Zinc Plating, or Wear-Resistant Nickel Plating
Custom Sourcing Track	Factory Direct Channels, Large Stock, Full OEM & ODM Track Support