WSP Universal Joint Coupling

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WSP Series Universal Joint Coupling – Single / Double / Telescopic with Roller Bearings | 42CrMo or Aluminum Alloy | Customizable

Model Number
Check below, custom

Product Description

WSP Series Universal Joint Coupling – Single / Double / Telescopic with Roller Bearings

42CrMo or Aluminum Alloy | H7 Precision Bore | Up to 4000 RPM | Customizable Lengths & Mountings

Product Overview

The WSP Series Universal Joint Coupling is a high‑precision power transmission solution designed for applications that require angular misalignment compensation, smooth torque transfer, and long service life. Available in single‑joint, double‑joint, and telescopic spline configurations, this coupling family covers a wide range of industrial needs – from compact servo drives to heavy‑duty machinery with variable shaft distances.

Manufactured from either high‑strength 42CrMo alloy steel or lightweight aluminum alloy, the WSP series features cross‑shaft roller bearings (needle bearings) that minimise friction, enabling speeds up to 4000 RPM and ensuring quiet, vibration‑free operation. With H7‑precision bores, multiple fixing options (keyway, set screw, pin hole, clamp), and full customisation support, the WSP coupling is the versatile choice for engineers worldwide.

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

Key Features

Feature	Benefit
Choice of 42CrMo or Aluminum Alloy	42CrMo offers superior strength and impact resistance; aluminum provides light weight and corrosion resistance – choose based on your torque and weight requirements
Cross‑Shaft Roller Bearings	Precision needle bearings reduce friction and heat, allowing speeds up to 4000 RPM with low noise and long life
Single, Double & Telescopic Options	Single joint for simple angular misalignment; double joint for larger angles (up to 80° total); telescopic spline for variable axial distances
H7 Precision Bore	Ground to tight H7 tolerance for accurate shaft fitting, high concentricity, and minimal runout
Multiple Fixing Methods	Keyway + set screw (standard), pin hole, clamp, or hexagon/square bores available to suit your assembly needs
Black Oxide or Zinc‑Plated Finish	Standard surface treatment provides corrosion resistance; custom finishes available on request
Intermediate Square Block Design	(Optional) Enhances torque transmission and rigidity for heavy‑duty applications
Full Customisation	Bores, keyways, splines, lengths, and materials can be tailored to your exact specifications

Technical Specifications

Parameter	Details
Model Series	WSP – Single (WSP‑S), Double (WSP‑D), Telescopic (WSP‑T)
Hub Material	42CrMo Alloy Steel (heat‑treated) or Aluminum Alloy (e.g., 7075 or 6061)
Pin / Bearing Material	Bearing Steel (HRC 55‑58) with needle rollers
Bore Tolerance	H7 Precision
Max Working Angle (per joint)	40° (45° limit)
Max Speed (roller bearing type)	Up to 4000 RPM
Surface Treatment	Black oxide, zinc‑plated, or anodised (aluminium)
Mounting Options	Keyway + set screw, pin hole, clamp, hexagon, square, spline
Certification	ISO 9001
Place of Origin	Guangdong, China

Product Configurations – Choose Your Type

Type	Description	Max Angle	Best Application
Single Joint (WSP‑S)	One universal joint with roller bearings	Up to 40°	Compact spaces, moderate misalignment
Double Joint (WSP‑D)	Two joints with a centre shaft	Up to 80° total	Large angular displacement, multi‑axis machines
Telescopic Spline (WSP‑T)	Universal joint + splined telescopic shaft	Up to 40° per joint	Variable distance between shafts, axial movement compensation

Standard Dimensions – Telescopic Spline (WSP‑T 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 are available – contact us with your requirements.

Standard Dimensions – Single Joint (G / UNKA Style)

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

Standard Dimensions – Double Joint (GD / UNKW Style)

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

Fixing Options Available

Keyway + Set Screw – Standard, secure, and easy to install
Pin Hole – For high‑torque or permanent applications
Clamp Type – Zero backlash, suitable for servo drives
Hexagon (F) / Square (S) Bore – For direct connection to hex/square shafts
Spline (H) – Involute or straight spline profiles available

When ordering, specify the desired bore type (e.g., 20K for keyway, 20F for hexagon, 20H for spline).

Applications

The WSP Series universal joint coupling is widely used in:

CNC Machine Tools – Milling, drilling, tapping
Automation Equipment – Robotic arms, conveyors, pick‑and‑place systems
Packaging & Printing Machinery – High‑speed continuous lines
Textile Machinery – Precision weaving and spinning equipment
Food Processing Equipment – Stainless steel or aluminium options for hygiene
Medical Devices – Smooth, low‑backlash drives
Agricultural & Construction Machinery – Heavy‑duty, shock‑resistant connections
Solar Tracking Systems – Outdoor, corrosion‑resistant solutions

Why Choose Apexcoupling?

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

🔧 Material Choice – 42CrMo for strength, aluminium for weight reduction – we supply both

⚡ High‑Speed Capability – Roller bearings allow speeds up to 4000 RPM

📐 Full Customisation – Bores, keyways, splines, lengths, and finishes – we build to your drawing

✅ ISO Certified Quality – Strict quality control from raw material to finished product

📦 Large Stock – Standard models ready for immediate shipment

💬 Expert Engineering Support – Our team helps you select the optimal configuration

Custom & Non‑Standard Orders

We understand that no two applications are the same. Apexcoupling offers extensive customisation:

Custom bore diameters (2 mm – 100 mm+)
Special keyway widths and depths
Hexagon (F), square (S), or spline (H) bores
Non‑standard outer diameters and overall lengths
Telescopic stroke ranges (longer or shorter)
Material substitutions (e.g., stainless steel, titanium)
Surface treatments (anodising, nickel plating, etc.)
OEM/ODM with your branding

📧 Send your CAD drawing or requirement 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.

Model	Series	Type	Inner Dia (mm)	Outer Dia (mm)	Length (mm)	Extended Length (mm)	Connection
WSP‑03GA	WSP	Telescopic	12	20	140	170	–
WSP‑04GA	WSP	Telescopic	14	25	160	190	–
WSP‑05GA	WSP	Telescopic	14	28	170	200	–
WSP‑1GA	WSP	Telescopic	16	32	190	220	–
WSP‑2GA	WSP	Telescopic	18	36	230	280	–
WSP‑3GA	WSP	Telescopic	20	42	250	300	–
WSP‑4GA	WSP	Telescopic	22	45	250	280	–
WSP‑5GA	WSP	Telescopic	25	50	295	345	–
WSP‑6GA	WSP	Telescopic	30	58	330	380	–
WSP‑7GA	WSP	Telescopic	35	70	350	400	–
UNCA6	UNCA	Single	6	12	31	–	Pin + Snap Ring
UNCA8	UNCA	Single	8	16	36	–	Pin + Snap Ring
UNCA10	UNCA	Single	10	20	42	–	Pin + Snap Ring
UNCA12	UNCA	Single	12	23	52	–	Pin + Snap Ring
UNCA14	UNCA	Single	14	25	59	–	Pin + Snap Ring
UNCA16	UNCA	Single	16	32	74	–	Pin + Snap Ring
UNCA18	UNCA	Single	18	32	81	–	Pin + Snap Ring
UNCA20	UNCA	Single	20	36	87	–	Pin + Snap Ring
UNCA25	UNCA	Single	25	45	105	–	Pin + Snap Ring
UNCA30	UNCA	Single	30	50	122	–	Pin + Snap Ring
UNCW10	UNCW	Double	10	20	67.5	–	Pin + Snap Ring
UNCW12	UNCW	Double	12	23	83	–	Pin + Snap Ring
UNCW14	UNCW	Double	14	25	94.5	–	Pin + Snap Ring
UNCW16	UNCW	Double	16	32	117.5	–	Pin + Snap Ring
UNCW20	UNCW	Double	20	36	139	–	Pin + Snap Ring
WXD1	WXD	Single	10	16	60	–	–
WXD2	WXD	Single	12	20	64	–	–
WXD3	WXD	Single	14	25	80	–	–
WXD4	WXD	Single	18	32	92	–	–
WXD5	WXD	Single	22	40	116	–	–
WXD6	WXD	Single	28	50	138	–	–
WXD7	WXD	Single	35	60	182	–	–
WX1	WX	Double	10	16	80	–	–
WX2	WX	Double	12	20	90	–	–
WX3	WX	Double	14	25	112	–	–
WX4	WX	Double	18	32	130	–	–
WX5	WX	Double	22	40	164	–	–
WX6	WX	Double	28	50	196	–	–
WX7	WX	Double	35	60	252	–	–

Additional Notes:

For the UNCA and UNCW series, the connection method is Pin + Snap Ring (销钉+卡簧) as indicated in the original images.
The WXD and WX series do not specify a connection method; they are standard set‑screw or clamping types (please confirm with supplier).
Custom telescopic (伸缩型) and non‑standard sizes are available upon request – contact customer service for details.