DJ KC/KCD Removable Universal Joint Coupling | 45° Angle, H7 Bore

PRODUCTS

CONTACT US

DJ Series KC/KCD Removable Universal Joint Coupling – 45° Angle, H7 Bore, Detachable Joints

Model Number
Check below, custom

Product Description

DJ Series KC/KCD Removable Universal Joint Coupling – 45° Angle, H7 Bore, Detachable Joints for Easy Maintenance

The Apexcoupling DJ series KC/KCD is a high-precision removable universal joint coupling engineered for reliable power transmission in applications requiring both angular misalignment compensation and easy maintenance. Available in single joint (KC type) and double joint (KCD type) configurations, these couplings are designed for two shafts that are not in the same axis. Featuring detachable joints that allow for quick disassembly and maintenance, the DJ series delivers large angular compensation capacity, compact structure, and high transmission efficiency. Manufactured from 40Cr alloy steel with optional 304/316 stainless steel, the KC/KCD series is the ideal solution for packaging machinery, woodworking equipment, multi-spindle drills, metallurgical machinery, printing presses, and general automation.

✅ Removable/detachable joints – easy maintenance without disassembling the entire system. 45° limit angle (30° recommended) – large angular compensation. H7 precision bore – accurate shaft fit. Keyway, hexagon, or square hole options – flexible connection types. 40Cr alloy steel – high strength and durability. 304/316 stainless steel option – corrosion resistance.

Key Technical Specifications

Parameter	KC Type (Single Joint)	KCD Type (Double Joint)
Structure	Single universal joint	Double universal joint
Body Material	40Cr alloy steel (standard); 304/316 stainless steel optional	40Cr alloy steel (standard); 304/316 stainless steel optional
Surface Treatment	Black oxide, polished, chrome plated, nickel plated, sandblasted	Black oxide, polished, chrome plated, nickel plated, sandblasted
Maximum Angle Per Joint	45° (limit) / 30° (recommended)	45° (limit) / 30° (recommended)
Bore Tolerance	H7	H7
Bore Options	Keyway (DIN 6885-1 JS9), hexagon hole, square hole	Keyway (DIN 6885-1 JS9), hexagon hole, square hole
Bore Diameter Range	4 – 90 mm (H7)	4 – 90 mm (H7)
Outer Diameter Range	8 – 120 mm	8 – 120 mm
Length Range	25 – 489 mm	35 – 489 mm
Detachable Joints	✅ Yes – removable for easy maintenance	✅ Yes – removable for easy maintenance
Nominal Torque	Varies by model	Varies by model
Angular Compensation	Large	Large
Customization	OEM – custom bores, keyways, and materials	OEM – custom bores, keyways, and materials
Applicable Industries	Packaging machinery, woodworking, multi-spindle drills, metallurgy, printing, conveyors, general automation	Packaging machinery, woodworking, multi-spindle drills, metallurgy, printing, conveyors, general automation
Place of Origin	Guangdong, China	Guangdong, China

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

KC/KCD Series – Model Range & Specifications

Model	d1/d2 (H7) mm	D (mm)	L1 (mm)	L2 (mm)	L3 (mm)	S (mm)	b (mm)	t (mm)
KC-04 / KCD-04	4	8	12.5	25	35	–	–	–
KC-05 / KCD-05	5	10	14	28	40	–	–	–
KC-06 / KCD-06	6	12	16	32	46	–	–	–
KC-07 / KCD-07	7	14	18	36	52	–	–	–
KC-08 / KCD-08	8	16	21	42	60	–	–	–
KC-09 / KCD-09	9	18	24	48	68	–	3	10.4
KC-10 / KCD-10	10	20	27	54	76	10	3	11.4
KC-12 / KCD-12	12	24	30	60	87	12	4	13.8
KC-14 / KCD-14	14	28	35	70	102	14	5	16.3
KC-16 / KCD-16	16	32	40	80	117	16	5	18.3
KC-18 / KCD-18	18	36	45	90	132	18	6	20.8
KC-20 / KCD-20	20	40	50	100	147	20	6	22.8
KC-22 / KCD-22	22	45	55	110	163	22	6	24.8
KC-25 / KCD-25	25	50	62.5	125	184	25	8	28.3
KC-30 / KCD-30	30	55	67.5	135	200	30	8	33.3
KC-35 / KCD-35	35	60	82.5	165	236	33	10	38.3
KC-40 / KCD-40	40	65	95	190	267	36	12	43.3
KC-45 / KCD-45	45	70	105	210	292	40	14	48.8
KC-50 / KCD-50	50	80	115	230	322	45	14	53.8
KC-60 / KCD-60	60	90	130	260	362	50	18	64.4
KC-70 / KCD-70	70	100	145	290	404	55	20	74.9
KC-80 / KCD-80	80	110	160	320	444	60	22	85.4
KC-90 / KCD-90	90	120	175	350	489	65	25	95.4

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

KC (Single) vs KCD (Double) – Which One Do You Need?

Feature	KC (Single Joint)	KCD (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
Best for	Shafts intersecting at an angle on the same plane	Shafts both angled and offset

Rule of thumb:

Use KC (single joint) for applications where shafts are on the same plane but angled.
Use KCD (double joint) for applications where shafts are both angled and offset – provides smoother motion.

💡 The angle between the two shafts is allowed to change within a limited range (up to 45° limit, 30° recommended) according to working needs.

Product Structure – Removable/Detachable Joints

Two Yokes (Forks) – Precision-machined from 40Cr alloy steel with H7 bores.
Cross Shaft (Cross Axis) – The central component that transmits torque.
Removable/Detachable Joints – Allow for quick disassembly and maintenance without disassembling the entire system.
Keyway, Hexagon, or Square Hole – Customizable connection types.
304/316 Stainless Steel Option – Corrosion-resistant for demanding environments.

💡 How it works: The DJ series KC/KCD coupling consists of two yokes connected by a cross shaft. The removable/detachable joint design allows for easy maintenance and component replacement – simply disassemble the joint without removing the entire coupling from the shafts. This significantly reduces maintenance downtime. The angle between the two shafts is allowed to change within a limited range (up to 45° limit, 30° recommended) according to working needs. The coupling provides large angular compensation capacity with compact structure and high transmission efficiency.

Product Features & Advantages

Advantage	Benefit
Removable/Detachable Joints	Easy maintenance and component replacement – reduces downtime
45° Angle Per Joint (30° Recommended)	Large angular compensation – accommodates significant misalignment
40Cr Alloy Steel	High strength, excellent toughness, and fatigue resistance
304/316 Stainless Steel Option	Corrosion-resistant for demanding environments
Single or Double Joint	KC (single) for angular only, KCD (double) for angular + parallel offset
H7 Precision Bore	High concentricity, accurate shaft fit – reduces vibration
Multiple Bore Options	Keyway, hexagon, square – choose your connection type
Multiple Surface Finishes	Black oxide, polished, chrome, nickel, sandblasted
Large Angular Compensation	Accommodates significant shaft misalignment
High Transmission Efficiency	Minimal power loss – reliable torque transmission
Compact & Reliable	Simple structure, compact design, long service life
OEM Customization	Custom bores, keyways, materials, and finishes

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
Printing Equipment – Register control, high-speed operation
Paper Machinery – Paper production and finishing
Food & Beverage Machinery – Hygienic, reliable drives (with stainless steel option)
CNC Machines – Feed drives, positioning systems
Agricultural Machinery – Farm equipment, harvesters
General Automation – Pick-and-place systems, indexing tables

Why Choose Apex Coupling for DJ KC/KCD Universal Joints?

Advantage	Description
Factory Direct	Competitive B2B pricing – no middlemen
Removable/Detachable Joints	Easy maintenance – reduces downtime
Premium 40Cr Steel	High strength, toughness, and fatigue resistance
304/316 Stainless Steel Option	Corrosion-resistant for demanding environments
Single or Double Joint	One product family covers all angular and offset needs
45° Angle Capacity	Large angular compensation
H7 Precision Bore	High accuracy, low backlash, reliable operation
Multiple Bore Options	Keyway, hexagon, square – fully customizable
Multiple Finishes	Black oxide, polished, chrome, nickel, sandblasted
OEM Customization	Custom bores, materials, and finishes available

FAQ

Q: What is the difference between KC and KCD?
A: KC is a single universal joint – for angular misalignment only. KCD 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 are “removable/detachable joints”?
A: The joints can be disassembled for maintenance without removing the entire coupling from the shafts – significantly reducing downtime.

Q: What materials are available?
A: Standard is 40Cr alloy steel. We also offer 304 and 316 stainless steel for corrosion-resistant applications.

Q: What is the bore tolerance?
A: Standard finished bore tolerance is H7 for precision shaft fit.

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

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

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

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

Request a Quote

Send us your configuration (KC single or KCD 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.