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3/8" Universal Joint – G Type & GD Type Precision Single / Double Universal Joint for Machine Tools & Hand Sockets | 42CrMo Alloy Steel | Custom
Model Number
Check below, custom
D-Diameter, L-Length, d-One Bore, e-Another Bore
Single Structure D20-L42-d10-e10
Single D23-L52-d12-e12
Single D25-L59-d14-e14
Single D32-L74-d16-e16
Single D36-L87-d20-e20
Double D20-L67.5-d10-e10
Double D23-L83-d12-e12
Double D25-L94.5-d14-e14
Double D32-L117.5-d16-e16
Double D36-L139-d20-e20
- Phone : +86 13431039760
- Wechat : +86 13431039760
- Whatsapp : +86 13431039760
- Email : ella@apexcoupling.com
Product Description
3/8″ Universal Joint – G Type & GD Type Precision Single / Double Universal Joint
Factory Direct from Guangdong, China | 42CrMo Alloy Steel | SUS304 / SUS316 Optional | Operating Angle 0–90° | Torque 4.5–1500 N·m | Up to 4000 rpm | H7 Precision Bore | ISO9001, RoHS & BV Certified
Product Overview
The G Type & GD Type Precision Universal Joint from Apexcoupling is a high-performance flexible coupling designed for transmitting torque between shafts at an angle. Manufactured in Guangdong, China, this precision universal joint is available in single (G type) and double (GD type) configurations, making it ideal for machine tools, hand sockets, transmission systems, and general industrial drive applications.
The universal joint pins, bushings, and blocks are made from high-quality alloy steel including 40Cr, 40CrNi, 20CrMo, or 20CrMnVB, with 42CrMo as the standard material. All parts can be customized with SUS304 or SUS316 stainless steel for corrosion resistance. The two sleeves can be customized with high-strength aluminium alloy or insulating nylon for electrical isolation.
The coupling features an operating angle of 0–90°, a nominal torque range of 4.5–1500 N·m, and a maximum speed of 4000 rpm. The H7 precision bore ensures high concentricity and accurate shaft fit. Custom bore options include keyway, hexagon hole, and square hole. Both ends of the connection can be customized into internal spline shaft hole, spline shaft, optical shaft plus pin hole, optical shaft plus keyway, square shaft, hexagonal shaft, or small flange.
Regular stock products: 1W‑03G type are A‑type standard shaft hole; 04G~13G type are B‑type standard shaft hole. Backed by ISO9001, RoHS, and BV certification, this precision universal joint is the reliable choice for demanding transmission applications.
📧 Get a Quote: ella@apexcoupling.com
Key Attributes
| Attribute | Value |
|---|---|
| System of Measurement | Metric |
| Bore Diameter | 10 mm (0.39 in) |
| Inner Hole Diameter | 6 – 50 mm |
| Outer Diameter | 12 – 93 mm |
| Material | 42CrMo Alloy Steel (standard) |
| Length | 200 mm (7.87 in) |
| Structure | Single (G type); Double (GD type) available |
| Type | Single and Double Universal Joints |
| Operating Angle | 0 – 90° |
| Nominal Torque | 4.5 – 1500 N·m |
| Nmax | 4000 rpm |
| Precision Parts | SUS304 Stainless Steel |
| Customized Hole | Keyway, Hexagon Hole, Square Hole |
| Customized Support | OEM, ODM, OBM |
| Certificate | ISO9001, RoHS, BV |
| Warranty | 1 Year |
| Place of Origin | Guangdong, China |
| Brand Name | Apexcoupling |
| Application | Transmission System |
| Applicable Industries | Building Material Shops, Manufacturing Plant, Machinery Repair Shops, Food & Beverage Factory, Farms, Retail, Printing Shops, Construction Works, Energy & Mining, Other |
G Type / GD Type Series – Standard Configurations
| Model Range | Type | Standard Shaft Hole |
|---|---|---|
| 1W‑03G | Single (G type) | A‑type standard shaft hole |
| 04G ~ 13G | Single (G type) | B‑type standard shaft hole |
| 1W‑03GD ~ 13GD | Double (GD type) | A‑type / B‑type |
Contact us for specific dimensions and torque ratings for each model.
Structural Features
Universal joint pins, bushings, and blocks are made of high-quality alloy steel 40Cr, 40CrNi, 20CrMo, or 20CrMnVB, etc.
All parts of the universal joint can be customized with SUS304 and SUS316 stainless steel.
The two sleeves of the universal joint can be customized with high-strength aluminium alloy, or customized with insulating nylon.
Customized square hole, keyway, and hexagon hole as your request; the finished hole is H7.
Both ends of the connection mode can be customized into internal spline shaft hole, spline shaft, optical shaft plus pin hole, optical shaft plus keyway, square shaft, hexagonal shaft, small flange, and other forms. Please contact us for specific parameters.
Regular stock products: 1W‑03G type are A‑type standard shaft hole; 04G~13G type are B‑type standard shaft hole.
Key Features
| Feature | Benefit |
|---|---|
| 42CrMo Alloy Steel | High strength, toughness, and wear resistance for demanding applications |
| SUS304 / SUS316 Optional | Corrosion-resistant stainless steel for harsh environments |
| Aluminium Alloy or Nylon Sleeves | Lightweight or insulating options to suit your application |
| Single & Double Types | G type (single) for simple angular misalignment; GD type (double) for larger angles |
| Operating Angle 0–90° | Wide angular compensation range |
| Nominal Torque 4.5–1500 N·m | Covers a broad range of transmission requirements |
| Up to 4000 rpm | Suitable for high-speed machine tool and socket applications |
| H7 Precision Bore | High concentricity and accurate shaft fit |
| Custom Holes | Keyway, hexagon, square, spline, and pin hole options |
| Custom End Connections | Internal spline, spline shaft, optical shaft + pin, square, hex, small flange |
| ISO9001, RoHS & BV Certified | Quality, environmental, and safety assurance |
| Factory Direct | Competitive pricing and stable supply from China |
Technical Specifications
| Parameter | Details |
|---|---|
| Product Name | G Type & GD Type Precision Universal Joint |
| Brand | Apexcoupling |
| Type | Single (G) and Double (GD) Universal Joints |
| Material | 42CrMo Alloy Steel (standard); 40Cr, 40CrNi, 20CrMo, 20CrMnVB; SUS304 / SUS316 optional |
| Sleeve Material | High-Strength Aluminium Alloy or Insulating Nylon (optional) |
| Bore Diameter | 10 mm (standard); 6 – 50 mm range |
| Outer Diameter | 12 – 93 mm |
| Length | 200 mm |
| Operating Angle | 0 – 90° |
| Nominal Torque | 4.5 – 1500 N·m |
| Maximum Speed | 4000 rpm |
| Bore Tolerance | H7 |
| Custom Holes | Keyway, Hexagon, Square |
| Custom End Connections | Internal spline, spline shaft, optical shaft + pin, optical shaft + keyway, square shaft, hexagonal shaft, small flange |
| Certificate | ISO9001, RoHS, BV |
| Warranty | 1 Year |
| Place of Origin | Guangdong, China |
| Application | Transmission System |
| Applicable Industries | Building Material Shops, Manufacturing Plant, Machinery Repair Shops, Food & Beverage Factory, Farms, Retail, Printing Shops, Construction Works, Energy & Mining, Other |
Customization Options
Apexcoupling offers extensive customization for precision universal joints:
Custom bore diameters (6–50 mm and beyond)
Keyway, hexagon, square, and spline holes
SUS304 / SUS316 stainless steel parts
Aluminium alloy or insulating nylon sleeves
Custom end connections: internal spline shaft hole, spline shaft, optical shaft + pin hole, optical shaft + keyway, square shaft, hexagonal shaft, small flange
Surface treatments: black oxide, zinc plating, nickel plating, polishing
Single (G) and double (GD) configurations
Drawing-based production
OEM / ODM / OBM with your branding
📧 Send your drawing or requirements to: ella@apexcoupling.com
Applications
The G type & GD type precision universal joint is widely used in:
Machine Tools – Milling, drilling, tapping, and engraving machines
Hand Sockets – 3/8″ drive universal joints for socket wrench sets
Transmission Systems – General industrial drive systems
Building Material Shops – Conveyors, mixers, and processing equipment
Manufacturing Plants – Factory automation and assembly lines
Machinery Repair Shops – Replacement and repair of universal joints
Food & Beverage Factories – Hygienic and reliable drive connections
Farms – Agricultural machinery and equipment
Retail – Tool and equipment maintenance
Printing Shops – Printing presses and paper handling equipment
Construction Works – Light construction machinery and equipment
Energy & Mining – Durable universal joints for demanding environments
Why Choose Apexcoupling?
🏭 Factory Direct in Guangdong, China – Integrated manufacturing and trading, competitive pricing
🔩 Premium 42CrMo Alloy Steel – High strength, toughness, and wear resistance
⚙️ H7 Precision Bore – High concentricity and accurate shaft fit
📐 Full Customization – Bores, holes, end connections, materials, and sleeves
🧾 ISO9001, RoHS & BV Certified – Quality, environmental, and safety assurance
📦 Regular Stock – 1W‑03G (A‑type) and 04G~13G (B‑type) standard shaft holes ready for fast delivery
✅ 1‑Year Warranty – Quality assurance and reliable after‑sales support
💬 Expert Technical Support – We help you select the correct universal joint for your application
Get a Quote Today
Ready to order or need more information? Contact us directly:
📧 Email: ella@apexcoupling.com
We reply within 24 hours with pricing, availability, and technical recommendations.
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