42CrMo Steel Universal Joint Coupling – Cross Needle Bearing Cardan Shaft | Factory Direct

PRODUCTS

CONTACT US

42CrMo Steel Universal Joint Coupling | Cross Needle Bearing Cardan Shaft | Telescopic & Custom Options

Model Number
Check below, custom

Product Description

42CrMo Steel Universal Joint Coupling – Cross Needle Bearing Cardan Shaft

Factory Direct | H7 Precision Bore | Up to 4000 RPM | 40° Working Angle | Single / Double / Telescopic Spline Options

Product Overview

The 42CrMo Steel Universal Joint Coupling (also known as a cardan shaft coupling or Hooke‘s joint) is a high-performance power transmission component designed to transmit torque between two shafts that are not perfectly aligned. Featuring a precision cross shaft with needle roller bearings, this coupling accommodates angular, axial, and radial misalignments while delivering smooth, reliable power transfer.

Manufactured from high-strength 42CrMo alloy steel with H7 precision bore tolerance, this universal joint coupling offers exceptional durability, high torque capacity, and minimal backlash. Available in single joint, double joint, and telescopic spline configurations, it is the ideal solution for industrial drive systems, CNC machinery, packaging equipment, and automation applications.

📧 Get a Quote: ella@apexcoupling.com | WhatsApp/WeChat: +86 13431039760

Key Features

Feature	Benefit
Premium 42CrMo Alloy Steel	Forged from high-grade 42CrMo with heat treatment – tensile strength ≥1080 MPa, yield strength ≥930 MPa. Body hardness reaches HRC 48-52 for maximum durability and torque capacity
Cross Needle Bearing Design	High-load needle roller bearings reduce friction and heat, enabling smooth, low-noise operation at speeds up to 4000 RPM
H7 Precision Inner Bore	Machined to strict H7 tolerance standards, ensuring high concentricity, accurate shaft alignment, and minimal backlash
Large Angular Compensation	Supports up to 40° working angle per joint (45° limit) – ideal for applications with significant shaft misalignment
Bearing Steel Pins	Internal pins made from bearing steel with hardness HRC 55-58, ensuring exceptional wear resistance under heavy loads
Keyway + Set Screw Fixing	Dual locking mechanism ensures secure shaft connection and prevents loosening under vibration
Black Oxide / Zinc-Plated Finish	Professional surface treatment provides superior corrosion resistance and extended service life
Full Customization Support	Custom bore sizes, keyways, spline profiles, hexagon/square bores, and special lengths available upon request

Technical Specifications

Parameter	Details
Material	42CrMo Alloy Steel (Heat-Treated)
Pin Material	Bearing Steel (HRC 55-58)
Body Hardness	HRC 48-52
Bore Tolerance	H7 Precision Standard
Max Working Angle	40° (Recommended) / 45° (Limit) per joint
Max Speed	Up to 4000 RPM (Needle Bearing Type)
Surface Treatment	Black Oxide / Zinc-Plated
Mounting Options	Keyway + Set Screw / Pin Hole / Hexagon Bore / Square Bore
Product Certification	ISO Certified
Compliance Standard	JB/T5901-1991
Place of Origin	Guangdong, China

Product Series – Choose Your Configuration

Series	Type	Configuration	Max Angle	Best For
Single Joint	G / UNKA / CSKA	One universal joint	Up to 40°	Compact drives, simple angular misalignment
Double Joint	GD / UNKW / CSKW	Two universal joints with center shaft	Up to 80° total	Large angular compensation, multi-axis equipment
Telescopic Spline	WSP Series	Universal joint + telescopic spline shaft	Up to 40° per joint	Variable shaft spacing, axial displacement compensation

Model Dimensions – Single Joint (G / UNKA Series)

Model	Type	Outer Diameter (mm)	Length (mm)	Bore Diameter (mm)
1G / UNKA10	Single	20	42	10
2G / UNKA12	Single	23	52	12
3G / UNKA14	Single	25	59	14
4G / UNKA16	Single	28-32	60-74	14-16
5G / UNKA20	Single	32-36	82-87	16-20
6G	Single	36	87	18
7G	Single	42	94	20
8G	Single	45	95	22
9G	Single	50	108	25
10G	Single	58	122	30
11G	Single	68	140	35
12G	Single	78	160	40
13G	Single	93	190	50

Custom bore sizes and lengths available upon request.

Model Dimensions – Double Joint (GD / UNKW Series)

Model	Type	Outer Diameter (mm)	Length (mm)	Bore Diameter (mm)
1GD / UNKW10	Double	20	68	10
2GD / UNKW12	Double	23	83	12
3GD / UNKW14	Double	25	94	14
4GD	Double	28	101	14
5GD / UNKW16	Double	32	125	16
6GD	Double	36	132	18
7GD / UNKW20	Double	42	149	20
8GD	Double	45	150	22
9GD	Double	50	173	25
10GD	Double	58	200	30
11GD	Double	68	226	35
12GD	Double	78	264	40
13GD	Double	93	304	50

Model Dimensions – Telescopic Spline (WSP Series)

Model	Bore Diameter (mm)	Outer Diameter (mm)	Retracted Length (mm)	Extended Length (mm)
WSP-03GA	12	22	140	170
WSP-04GA	12	25	160	190
WSP-05GA	14	28	170	200
WSP-1GA	16	32	190	220
WSP-2GA	18	36	230	280
WSP-3GA	20	42	250	300
WSP-4GA	22	45	250	280
WSP-5GA	25	50	295	345
WSP-6GA	30	58	330	—

Custom stroke lengths and bore sizes available upon request.

Applications

The 42CrMo Steel Universal Joint Coupling is widely used in:

CNC Machine Tools – Lathes, milling machines, machining centers
Automation Equipment – Factory automation (FA) drive systems
Packaging Machinery – High-speed packaging and printing lines
Textile Machinery – Precision textile manufacturing equipment
Drilling & Tapping Machines – High-speed precision drilling applications
Agricultural Machinery – Farm equipment and implements
Construction Equipment – Heavy-duty construction machinery
Industrial Drive Systems – General motor applications

Why Choose Apexcoupling?

🏭 Factory Direct – Integrated manufacturing and trading, eliminating middleman costs

🔧 Premium Materials – 42CrMo alloy steel with heat treatment for superior strength and fatigue resistance

⚡ High-Speed Capability – Needle bearing design supports up to 4000 RPM

📐 Full Customization Support – Custom bore sizes, keyways, spline profiles, hexagon/square bores, and special lengths

✅ ISO Certified Quality – Stringent quality control throughout production

🌍 Global Shipping – Fast and reliable delivery worldwide

💬 Expert Technical Support – Our team helps you select the right coupling for your application

Custom & Non-Standard Orders

Need a custom bore size, special keyway, spline profile, or telescopic stroke length? We‘ve got you covered.

Our factory supports:

Custom bore diameters (6–200mm and beyond)
Special keyway configurations (DIN 6885-1, JS9 tolerance)
Spline profiles (involute, straight, etc.)
Hexagon (F) and square (S) bore options
Custom lengths and telescopic stroke ranges
Pin hole and card slot configurations
OEM/ODM/OBM services

📧 Send your custom requirements to: ella@apexcoupling.com

Get a Quote Today

Ready to order or need more information? Contact us directly:

📧 Email: ella@apexcoupling.com
📱 WhatsApp / WeChat: +86 13431039760
🌐 Website: www.apexcoupling.com

We reply within 24 hours with pricing, availability, and technical recommendations.

Type	Outer Diameter (mm)	Length (mm)	Inner Diameter Range (mm)
Single	25	60	4–14
Single	25	80	5–14
Single	30	70	5–16
Single	30	90	5–16
Single	30	110	5–16
Single	35	80	6–19
Single	35	120	6–19
Single	40	90	6–22
Single	40	110	6–22
Single	40	130	6–22
Single	45	100	6–25
Single	45	120	8–25
Single	50	100	6–14
Single	50	110	10–26
Single	50	130	10–26
Single	50	150	10–26
Single	50	235	10–26
Single	55	120	12–28
Single	55	140	12–28
Single	55	160	12–28
Single	60	130	12–35
Single	60	150	12–35
Single	60	170	12–35
Single	65	140	12–38
Single	65	160	12–38
Single	65	180	12–38
Double	25	95	4–14
Double	25	125	4–14
Double	25	155	4–14
Double	30	100	5–16
Double	30	130	5–16
Double	30	160	5–16
Double	35	125	6–19
Double	35	155	6–19
Double	35	185	6–19
Double	40	145	6–22
Double	40	175	6–22
Double	40	205	6–22
Double	45	160	8–25
Double	45	190	8–25
Double	45	210	8–25
Double	50	175	10–26
Double	50	205	10–26
Double	55	190	12–28
Double	55	220	12–28
Double	55	250	12–28
Double	60	205	12–35
Double	60	230	12–35
Double	60	265	12–35
Double	65	220	12–38
Double	65	250	12–38
Double	65	280	12–38
Telescopic	25	165–205	4–14
Telescopic	25	195–235	4–14
Telescopic	25	225–265	4–14
Telescopic	30	185–225	5–16
Telescopic	30	215–255	5–16
Telescopic	30	245–285	5–16
Telescopic	35	215–265	6–19
Telescopic	35	245–295	6–19
Telescopic	35	275–325	6–19
Telescopic	40	235–285	6–22
Telescopic	40	265–315	6–22
Telescopic	40	295–345	6–22
Telescopic	45	250–300	8–25
Telescopic	45	280–330	8–25
Telescopic	50	280–340	10–26
Telescopic	50	310–370	10–26
Telescopic	50	340–400	10–26
Telescopic	55	300–360	12–28
Telescopic	55	330–390	12–28
Telescopic	55	360–420	12–28
Telescopic	60	320–380	12–35
Telescopic	60	350–410	12–35
Telescopic	60	380–440	12–35
Telescopic	65	335–395	12–38
Telescopic	65	365–425	12–38
Telescopic	65	395–455	12–38