GR/HR Precision Universal Joint | Quick Lock, DIN 808, 4000 RPM

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GR/HR Precision Universal Joint with Quick Lock – DIN 808, Plain/Needle Bearing, 4000 RPM

Model Number
Check below, custom

01GR-8*16*38
1GR-10*20*42
02GR-12*23*52
03GR-14*25*59
04GR-16*32*86
05GR-18*36*96
06GR-20*42*108
07GR-22*45*120
08GR-25*50*132
09GR-30*60*166

Product Description

GR/HR Precision Universal Joint with Quick Lock – DIN 808, Plain/Needle Bearing, 4000 RPM

The Apexcoupling GR/HR series is a precision single universal joint manufactured to DIN 808 standards, featuring an innovative quick lock (quick-release) mechanism that allows for tool-free separation from the shaft within seconds. Available in two configurations – Type GR with a plain bearing (max. 1,000 rpm) and Type HR with a needle bearing (max. 4,000 rpm) – this coupling delivers reliable power transmission with a maximum articulation angle of 45° per joint. The quick lock design enables rapid assembly and disassembly without special tools, significantly reducing maintenance downtime. With H7 finished bores, keyway (DIN 6885-1 JS9) or hexagon bore options, and 42CrMo steel construction, the GR/HR series is the ideal solution for manufacturing plants, machinery repair shops, food & beverage facilities, farms, printing shops, construction works, energy & mining, and general industrial applications requiring frequent shaft changes or maintenance.

✅ Quick lock – separate from shaft without tools in seconds. DIN 808 standard – quality assured. GR (plain bearing) – 1,000 RPM. HR (needle bearing) – 4,000 RPM, maintenance-free. 45° angle per joint. H7 bore with keyway or hexagon bore options. Direct KTR GR/HR replacement.

Key Technical Specifications

Parameter	GR Type (Plain Bearing)	HR Type (Needle Bearing)
Standard	DIN 808	DIN 808
Structure	Single precision universal joint	Single precision universal joint
Quick Lock	Yes – tool-free shaft separation	Yes – tool-free shaft separation
Bearing Type	Plain bearing (sliding)	Needle roller bearing
Maximum Speed	1,000 rpm	4,000 rpm
Maximum Angle Per Joint	45°	45°
Bore Type	H7 finished bore	H7 finished bore
Bore Options	Keyway (DIN 6885-1 JS9) or hexagon bore	Keyway (DIN 6885-1 JS9) or hexagon bore
Lubrication	Requires periodic lubrication	Permanent – maintenance-free
Body Material	42CrMo alloy steel (standard)	42CrMo alloy steel (standard)
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	Manufacturing plants, machinery repair shops, food & beverage, farms, printing shops, construction, energy & mining	Manufacturing plants, machinery repair shops, food & beverage, farms, printing shops, construction, energy & mining
Place of Origin	Guangdong, China	Guangdong, China

🔧 Custom bores, unequal bores, special materials, and finishes available. Contact us with your specifications.

GR vs HR – Which Bearing Type Do You Need?

Feature	GR (Plain Bearing)	HR (Needle Bearing)
Max Speed	1,000 rpm	4,000 rpm
Lubrication	Requires periodic lubrication	Permanent – maintenance-free
Friction	Higher – sliding contact	Lower – rolling elements
Shock Absorption	Excellent	Good
Best for	Low-speed, high-torque, shock loads, cost-sensitive applications	High-speed, smooth rotation, maintenance-critical applications

Recommendation:

Choose GR (plain bearing) for low-speed applications (below 1,000 RPM) where cost is a primary concern and periodic lubrication is acceptable.
Choose HR (needle bearing) for high-speed applications (above 1,000 RPM) where maintenance-free operation and low friction are priorities.

Quick Lock (Quick-Release) – Tool-Free Shaft Separation

The quick lock (quick-release) mechanism is the defining feature of the GR/HR series:

Feature	Benefit
Tool-free separation	Separate the joint from the shaft without using any tools
Rapid assembly	Install and remove in seconds – reduces downtime
No special equipment	No wrenches, pullers, or heating required
Ideal for frequent maintenance	Perfect for applications requiring regular shaft changes or inspection

✅ The quick lock allows separation from the shaft without any tool within short term – significantly reducing maintenance time and costs.

DIN 808 Standard – Quality Assured

The GR/HR series is manufactured to DIN 808 standards, which ensures:

Consistent quality – standardized dimensions and tolerances
Interchangeability – compatible with other DIN 808 compliant products
Reliable performance – tested and proven design
Global acceptance – recognized standard worldwide

💡 DIN 808 precision joints are known for their precision and are widely used in mechanical engineering applications.

Product Features & Advantages

Advantage	Benefit
Quick Lock Mechanism	Tool-free shaft separation – rapid assembly/disassembly, reduced downtime
DIN 808 Standard	Manufactured to established German standard – quality and interchangeability
Two Bearing Options	GR (plain, 1000 RPM) or HR (needle, 4000 RPM) – match your speed and maintenance requirements
45° Angle Per Joint	Large angular compensation – accommodates significant misalignment
H7 Precision Bore	High concentricity, accurate shaft fit – reduces vibration
Multiple Bore Options	Keyway (DIN 6885-1 JS9) or hexagon bore – choose your connection type
Maintenance-Free (HR)	Needle bearing with permanent lubrication – no maintenance required
Single Joint Design	Compensates angular misalignment with simple, compact construction
Large Angular Displacement	Compensates for significantly larger angular displacements compared to other coupling types
Multiple Surface Finishes	Black oxide, nickel plated, zinc plated, chrome plated
OEM Customization	Custom bores, unequal bores, and special materials available

Applications

Manufacturing Plants – General power transmission, frequent shaft changes
Machinery Repair Shops – Quick replacement and maintenance
Food & Beverage Processing – Hygienic, quick-disconnect applications
Farms & Agriculture – Farm equipment, PTO drives
Printing Shops – Register control, high-speed operation
Construction Equipment – Quick assembly/disassembly
Energy & Mining – Conveyors, feeders, material handling
Packaging Machinery – Quick-change tooling and drives
Textile Machinery – High-speed, precision drives
General Industrial Machinery – Pumps, mixers, conveyors

Why Choose Apex Coupling for GR/HR Universal Joints?

Advantage	Description
Factory Direct	Competitive B2B pricing – no middlemen
DIN 808 Standard	Manufactured to established German standard – quality assured
Quick Lock Design	Tool-free shaft separation – reduces downtime
Two Bearing Options	Plain (GR, 1000 RPM) or needle (HR, 4000 RPM)
H7 Precision Bore	High accuracy, low backlash, reliable operation
Keyway or Hexagon Bore	Choose your connection type
Maintenance-Free (HR)	Permanent lubrication – no maintenance required
Large Angle Capacity	45° per joint – accommodates significant misalignment
OEM Customization	Custom bores, unequal bores, and special materials available

FAQ

Q: What is the difference between GR and HR type?
A: GR type features a plain bearing with a maximum speed of 1,000 rpm and requires periodic lubrication. HR type features a needle bearing with a maximum speed of 4,000 rpm and is maintenance-free with permanent lubrication.

Q: What is the quick lock mechanism?
A: The quick lock allows tool-free separation of the joint from the shaft within seconds – enabling rapid assembly, disassembly, and maintenance without special tools.

Q: What is the maximum operating angle?
A: Each joint can operate up to 45° maximum articulation angle.

Q: What standard is the coupling manufactured to?
A: The GR/HR series is manufactured to DIN 808 standards.

Q: What bore options are available?
A: Standard is H7 finished bore. Options include keyway (DIN 6885-1 JS9) or hexagon bore.

Q: What materials are used?
A: Standard is 42CrMo alloy steel. Special materials available on request.

Q: Is the HR type maintenance-free?
A: Yes. The HR type features needle bearings with permanent lubrication – no maintenance required.

Q: Can the joint compensate for parallel offset?
A: The single joint (GR/HR) compensates for angular misalignment only. Double joints (with two bearings) are required to offset radial displacement.

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

Q: What is the warranty?
A: 1 Year – quality assured.

Request a Quote

Send us your type (GR or HR), bore size, bore type (keyway or hexagon), and application details. Our engineers will recommend the optimal model and provide a quotation within 24 hours.