CPWA/CPWW Precision Universal Joint Coupling | 42CrMo, 45° Angle, 11.2-1120 N·m

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Model Number
Check below, custom

Model	Type	Outer Diameter (mm)	Length (mm)	Inner Diameter (mm)
WXD1	Single	16	60	10
WXD2	Single	20	64	12
WXD3	Single	25	80	14
WXD4	Single	32	92	18
WXD5	Single	40	116	22
WXD6	Single	50	138	28
WXD7	Single	60	182	35
WX1	Double	16	80	10
WX2	Double	20	90	12
WX3	Double	25	112	14
WX4	Double	32	130	18
WX5	Double	40	164	22
WX6	Double	50	196	28
WX7	Double	60	252	35
WX8	Double	75	336	42

Product Description

CPWA/CPWW Precision Universal Joint Coupling – Single/Double, 42CrMo, 45° Angle, 11.2-1120 N·m

The Apexcoupling CPWA/CPWW series is a precision miniature universal joint coupling engineered for reliable power transmission in light to medium-duty industrial applications. Available in single joint (CPWA) and double joint (CPWW) configurations, these couplings are designed for connecting two shafts on the same plane with an angular misalignment of up to 45° per joint. Manufactured from 42CrMo alloy steel with quenched and tempered treatment (HRC48-52, with pins up to HRC56-58), this coupling delivers exceptional strength, wear resistance, and durability. Featuring H7 precision bore with keyway, hexagon, or square hole options, the CPWA/CPWW series is the ideal solution for packaging machinery, woodworking equipment, multi-spindle drills, metallurgical machinery, CNC machines, and general automation applications.

✅ Single (CPWA) or double (CPWW) – up to 45° per joint. 42CrMo alloy steel – HRC48-52 body, HRC56-58 pins. H7 precision bore – high concentricity. 11.2-1120 N·m torque – covers light to medium-duty applications. 1000 RPM (plain bearing) or 4000 RPM (needle bearing). OEM/ODM/OBM support.

Key Technical Specifications

Parameter	CPWA (Single Joint)	CPWW (Double Joint)
Standard	JB/T5901-1991	JB/T5901-1991
Structure	Single universal joint	Double universal joint
Body Material	42CrMo / 40Cr / 40CrNi / 20CrMo / 20CrMnVB alloy steel	42CrMo / 40Cr / 40CrNi / 20CrMo / 20CrMnVB alloy steel
Body Hardness	HRC48-52 (quenched & tempered)	HRC48-52 (quenched & tempered)
Pin Hardness	HRC56-58 (bearing steel)	HRC56-58 (bearing steel)
Precision Parts Option	SUS304 / SUS316 stainless steel	SUS304 / SUS316 stainless steel
Bearing Type (Standard)	Pin/block (plain bearing)	Pin/block (plain bearing)
Bearing Type (High-Speed)	Needle bearing	Needle bearing
Max Speed (Pin/Block)	1000 RPM	1000 RPM
Max Speed (Needle Bearing)	4000 RPM	4000 RPM
Maximum Angle Per Joint	45° (limit) / 30° (recommended)	45° (limit) / 30° (recommended)
Nominal Torque Range	11.2 – 1120 N·m	11.2 – 1120 N·m
Bore Tolerance	H7	H7
Bore Options	Keyway, hexagon hole, square hole, plain round	Keyway, hexagon hole, square hole, plain round
Surface Treatment	Black oxide, nickel plated, zinc plated, chrome plated	Black oxide, nickel plated, zinc plated, chrome plated
Customized support	OEM, ODM, OBM	OEM, ODM, OBM
Applicable Industries	Packaging machinery, woodworking, multi-spindle drills, metallurgy, CNC, FA automation	Packaging machinery, woodworking, multi-spindle drills, metallurgy, CNC, FA automation
Place of Origin	Guangdong, China	Guangdong, China

🔧 Custom bores, keyways, hexagon/square holes, materials (304/316 stainless steel), and special finishes available. Contact us with your specifications.

CPWA/CPWW Series – Model Range & Specifications

Model	Nominal Torque (N·m)	d (mm)	D (mm)	L (mm)	L1 (mm)	L2 (mm)	L3 (mm)	L4 (mm)	Moment of Inertia (CPWA)	Moment of Inertia (CPWW)
CPWA1 / CPWW1	11.2	10	16	22	30	60	80	20	0.05	0.07
CPWA2 / CPWW2	22.4	12	20	22	32	64	90	26	0.09	0.15
CPWA3 / CPWW3	45	14	25	27	40	80	112	32	0.15	0.22
CPWA4 / CPWW4	71	18	32	36	46	92	130	38	0.32	0.49
CPWA5 / CPWW5	140	22	40	38	58	116	164	48	0.59	0.91
CPWA6 / CPWW6	280	28	50	44	69	138	196	58	1.03	1.64
CPWA7 / CPWW7	560	35	60	60	91	182	252	70	2.31	3.38
CPWA8 / CPWW8	1120	42	75	84	122	244	336	92	4.41	6.63

📐 Additional sizes and custom dimensions available upon request. Contact our engineering team for custom sizing.

CPWA (Single) vs CPWW (Double) – Which One Do You Need?

Feature	CPWA (Single Joint)	CPWW (Double Joint)
Angular misalignment	✅ Up to 45°	✅ Up to 45° per joint
Parallel offset	❌ No	✅ Yes
Total articulation	Up to 45°	Up to 90°
Length	Shorter	Longer
Moment of inertia	Lower	Higher
Best for	Shafts intersecting at an angle on the same plane	Shafts both angled and offset

Rule of thumb:

Use CPWA (single joint) for applications with constant angular misalignment.
Use CPWW (double joint) for applications requiring parallel offset compensation or smoother motion at higher angles.

💡 The angle between the two shafts is allowed to change within a limited range according to working needs.

Bearing Selection – Pin/Block vs Needle Roller

The CPWA/CPWW series offers two bearing options:

Bearing Type	Max Speed	Dynamic Load Capacity	Best For
Pin/Block (Sliding)	1000 RPM	Good	Low-speed, high-torque, shock absorption
Needle Roller	4000 RPM	High	High-speed, smooth rotation, precision applications

⚠️ Note: It is recommended to use the coupling at ≤50% of the maximum rated speed for optimal service life.

Product Features & Advantages

Advantage	Benefit
42CrMo / 40Cr Alloy Steel	High strength, excellent toughness, and fatigue resistance – quenched & tempered to HRC48-52
Hardened Pins (HRC56-58)	Bearing steel pins – superior wear resistance and durability
45° Angle Per Joint	Large angular compensation – accommodates significant misalignment
Double Joint (CPWW) Capability	Up to 90° total articulation – handles both angular and parallel offset
H7 Precision Bore	High concentricity, accurate shaft fit – reduces vibration
Two Bearing Options	Pin/block (1000 RPM) or needle roller (4000 RPM) – match your speed requirement
Multiple Bore Options	Keyway, hexagon, square, or plain – choose your connection type
304/316 Stainless Steel Option	Corrosion-resistant – ideal for food, chemical, marine applications
Multiple Surface Finishes	Black oxide, nickel plated, zinc plated, chrome plated – choose based on your environment
Wide Torque Range	11.2-1120 N·m – covers light to medium-duty applications
OEM Customization	Custom bores, materials, finishes, and special designs available

Applications

Packaging Machinery – Conveyors, wrapping machines, carton sealers
Woodworking Machinery – Multi-spindle drills, routers, saws
Multi-Spindle Drills – Precision drilling operations
Metallurgical Equipment – Rolling mills, continuous casting lines
CNC Machines – Feed drives, positioning systems
Printing Equipment – Register control, high-speed operation
Textile Machinery – Spinning, weaving equipment
FA Automation – Pick-and-place systems, indexing tables
General Industrial Machinery – Pumps, mixers, conveyors

Why Choose Apex Coupling for CPWA/CPWW Universal Joints?

Advantage	Description
Factory Direct	Competitive B2B pricing – no middlemen
Premium 42CrMo/40Cr Steel	High strength, quenched & tempered – HRC48-52 body, HRC56-58 pins
Two Bearing Options	Pin/block (1000 RPM) or needle roller (4000 RPM)
H7 Precision Bore	High accuracy, low backlash, reliable operation
Multiple Bore Options	Keyway, hexagon, square, plain – fully customizable
Single or Double Joint	One product family covers all angular and offset needs
Stainless Steel Option	304/316 stainless steel for corrosion-resistant applications
Multiple Finishes	Black oxide, nickel plated, zinc plated, chrome plated
OEM Customization	Custom bores, materials, finishes, and special designs

Model Designation – CPWA/CPWW Series

CPWA-□□×□□-□□×□□ or CPWW-□□×□□-□□×□□

Position	Meaning	Example
CPWA / CPWW	Series code – Single or Double Universal Joint	CPWA
□□×□□	Outer Diameter (D) × Length (L)	16×60
□□×□□	Inner Diameter 1 (d1) × Inner Diameter 2 (d2)	10×10

Keyway Option: Add “K” after the shaft diameter.

Example: CPWA-16×60-10K×10K – both bores with keyways

Hexagon Option: Add “F” after the shaft diameter.

Example: CPWA-16×60-10F×10F – both bores with hexagon holes

Square Option: Add “S” after the shaft diameter.

Example: CPWA-16×60-10S×10S – both bores with square holes

FAQ

Q: What is the difference between CPWA and CPWW?
A: CPWA is a single universal joint – for angular misalignment only. CPWW is a double universal joint – allows both angular misalignment and parallel offset, providing smoother motion.

Q: What is the maximum operating angle?
A: Each joint can operate up to 45° limit angle. For continuous operation, we recommend ≤30°.

Q: What bearing options are available?
A: Pin/block (sliding) bearing – up to 1000 RPM. Needle roller bearing – up to 4000 RPM.

Q: What is the torque range?
A: The standard series covers 11.2 – 1120 N·m. Custom higher torque is available on request.

Q: What materials are available?
A: Standard is 42CrMo alloy steel. We also offer 304 and 316 stainless steel.

Q: What bore types are available?
A: We offer keyway, hexagon hole, square hole, and plain round hole.

Q: What is the bore tolerance?
A: Standard finished bore tolerance is H7.

Q: What are the common applications?
A: Packaging machinery, woodworking equipment, multi-spindle drills, metallurgy, CNC machines, and general automation.

Q: Can I get a custom coupling?
A: Yes. We offer OEM customization – custom bores, materials, and finishes available.

Request a Quote

Send us your configuration (CPWA single or CPWW double), bore size, bore type (keyway/hex/square), and application details. Our engineers will recommend the optimal model and provide a quotation within 24 hours.