DHCG Stainless Steel Oldham Coupling | Aluminum Bronze Slider, Zero Backlash, 3-95 N·m

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DHCG Stainless Steel High Rigidity Oldham Coupling – Aluminum Bronze Slider, Zero Backlash, Clamping Type

Model Number
Check below, custom

DHCG-14.5*18.4
DHCG-16.8*24.4
DHCG-20*27.2
DHCG-26*30.4
DHCG-30*33
DHCG-34*34
DHCG-38*39.5
DHCG-45*46
DHCG-55*57
DHCG-70*77

Product Description

DHCG Stainless Steel High Rigidity Oldham Coupling – Aluminum Bronze Slider, Zero Backlash, Clamping Type

The Apexcoupling DHCG series is a high-precision stainless steel Oldham coupling (cross slider coupling) engineered for demanding motion control applications where corrosion resistance, high rigidity, and zero backlash are critical. Featuring 304 stainless steel hubs and an aluminum bronze center slider, this all-metal coupling delivers exceptional durability, wear resistance, and long service life in harsh environments. The sliding disc design effectively compensates for radial and angular misalignment while maintaining accurate torque transmission. With clamping screw fastening for secure shaft fixation, H7 precision bore, and zero backlash operation, the DHCG series is the ideal solution for servo motors, stepper motors, CNC machines, food processing equipment, packaging machinery, chemical industry equipment, and automation systems.

✅ Zero backlash – press-fit design eliminates rotational clearance. 304 stainless steel hubs – excellent corrosion resistance for harsh environments. Aluminum bronze slider – superior wear resistance, durability, and electrical conductivity. High rigidity – all-metal construction for precision motion control. Clamping screw design – secure shaft fixation, easy installation. Maintenance-free – no lubrication required.

Key Technical Specifications

Parameter	Value
Brand	Apexcoupling
Model Series	DHCG (Stainless Steel High Rigidity Oldham Coupling)
Type	Flexible / Oldham / Cross Slider
Structure	Two stainless steel hubs + aluminum bronze center slider
Hub Material	304 stainless steel – corrosion-resistant, wear-resistant
Slider Material	Aluminum bronze – high wear resistance, low friction, excellent conductivity
Surface Treatment	Polished
Fastening Method	Clamping screw (clamp type)
Backlash	Zero – no rotational clearance
Bore Tolerance	H7
Outer Diameter Range	14.5 – 70 mm
Length Range	18.7 – 77 mm
Rated Torque Range	3 – 95 N·m
Maximum Speed	6000 – 8000 RPM (varies by model)
Misalignment Compensation	Radial (lateral) and angular
Lubrication	Ultra-high viscosity grease pre-filled in slider gaps – prevents seizure
Maintenance	None required – maintenance-free
Operating Temperature	-20°C to +80°C
Customization	OEM – custom bores, keyways, and materials
Applicable Industries	Servo motors, stepper motors, CNC machines, food processing, packaging, chemical, automation, semiconductor, medical devices
Place of Origin	Guangdong, China

🔧 Custom bores and keyways available. Contact us with your specifications.

DHCG Series – Model Range & Specifications

Model	Outer Diameter (D) mm	Length (L) mm	Torque Range (N·m)	Max Speed (RPM)
DHCG-14.5×18.4	14.5	18.4	3	8000
DHCG-16.8×24.4	16.8	24.4	–	–
DHCG-20×27.2	20	27.2	–	–
DHCG-26×30.4	26	30.4	–	–
DHCG-30×33	30	33	–	–
DHCG-34×34	34	34	–	–
DHCG-38×39.5	38	39.5	–	–
DHCG-45×46	45	46	–	5000
DHCG-55×57	55	57	–	–
DHCG-70×77	70	77	–	–

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

Product Structure

Two 304 Stainless Steel Hubs – Precision-machined with axial grooves, polished finish, H7 bore.
Aluminum Bronze Center Slider – High-strength, wear-resistant alloy with cross-slots at 90°.
Clamping Screws – Secure shaft fixation with even clamping force.
Ultra-High Viscosity Grease – Pre-filled in slider gaps to prevent seizure and achieve zero backlash.

💡 How it works: The DHCG Oldham coupling consists of two stainless steel hubs with axial grooves and an aluminum bronze center slider with matching cross-slots. As the coupling rotates, the slider slides within the grooves, accommodating radial and angular misalignment while transmitting torque with zero backlash. The ultra-high viscosity grease ensures smooth, seizure-free operation even under demanding conditions.

Stainless Steel + Aluminum Bronze – The Ultimate All-Metal Combination

The DHCG series features an all-metal construction combining 304 stainless steel hubs with an aluminum bronze slider:

Component	Material	Properties
Hubs	304 Stainless Steel	Excellent corrosion resistance, high strength, non-magnetic, hygienic
Slider	Aluminum Bronze	High wear resistance, low friction, good electrical conductivity, anti-galling

✅ This all-metal combination provides superior durability in harsh environments compared to plastic or aluminum couplings, making the DHCG series the ideal choice for food processing, chemical, marine, and cleanroom applications.

Product Features & Advantages

Advantage	Benefit
Zero Backlash	No rotational clearance – precise positioning for servo motors and encoders
304 Stainless Steel Hubs	Excellent corrosion resistance – ideal for harsh, wet, and chemical environments
Aluminum Bronze Slider	Superior wear resistance and low friction – long service life
High Rigidity	All-metal construction – maintains precision under load
Clamping Screw Design	Even clamping force, no shaft damage – easy installation
H7 Precision Bore	High concentricity and accurate shaft fit – reduces vibration
Radial & Angular Misalignment Compensation	Accommodates shaft offset – protects bearings and seals
Pre-Filled Grease	Ultra-high viscosity grease prevents seizure – zero backlash maintenance
Maintenance-Free	No lubrication required – reduces operating costs
Wide Temperature Range	-20°C to +80°C – suitable for diverse environments
Impact Torque Resistance	Withstands up to 4x permissible torque without damage (FSPJU equivalent)
OEM Customization	Custom bores, keyways, and materials available

Why Choose an Oldham Coupling?

Oldham couplings (cross slider couplings) offer several key advantages for precision applications:

Zero Backlash: Essential for servo motors, encoders, and precision positioning systems
High Radial Misalignment Capacity: Accommodates significant lateral shaft offset – up to 1.6mm
Electrical Isolation: Aluminum bronze slider provides electrical isolation between shafts
Low Maintenance: No lubrication required – reduces downtime
Balanced Design: Suitable for high-speed operation

✅ Oldham couplings are widely used in servo-driven systems that require precise motion control and a low inertia, balanced design.

Applications

Servo Motors – High-precision motion control, zero backlash requirement
Stepper Motors – Accurate positioning and step transmission
Food Processing Equipment – Corrosion-resistant, hygienic design
Packaging Machinery – Wrapping, sealing, labeling equipment
CNC Machines – Feed drives, positioning systems
Chemical Industry Equipment – Corrosion-resistant for harsh environments
Semiconductor Equipment – Cleanroom compatible, high precision
Medical Devices – Precision medical equipment
Automation Systems – Pick-and-place systems, robotics
Vacuum & Cleanroom Environments – Stainless steel construction suitable for clean applications

Why Choose Apex Coupling for DHCG Oldham Couplings?

Advantage	Description
Factory Direct	Competitive B2B pricing – no middlemen
Premium Materials	304 stainless steel hubs + aluminum bronze slider – durable and corrosion-resistant
Zero Backlash	Precision performance for encoders, servo motors, and stepper motors
High Rigidity	All-metal construction – maintains accuracy under load
High Radial Misalignment Capacity	Accommodates significant shaft offset
Clamping Screw Design	Secure, even clamping force – no shaft damage
H7 Precision Bore	High concentricity and accurate shaft fit
Maintenance-Free	Pre-filled grease – no lubrication required
Wide Model Range	DHCG-14.5×18.4 to DHCG-70×77 – covers most applications
OEM Customization	Custom bores, keyways, and materials available

FAQ

Q: What is a stainless steel Oldham coupling?
A: A stainless steel Oldham coupling is a flexible shaft coupling with two stainless steel hubs and a center slider. It transmits torque while accommodating radial and angular misalignment with zero backlash.

Q: What is the advantage of the aluminum bronze slider?
A: Aluminum bronze offers excellent wear resistance, low friction, and good electrical conductivity. It provides superior durability and anti-galling properties compared to plastic or standard bronze sliders.

Q: What materials are used?
A: The hubs are made of 304 stainless steel – corrosion-resistant, wear-resistant, and ideal for harsh environments. The slider is made of aluminum bronze – wear-resistant and durable.

Q: Does the coupling have backlash?
A: No. The DHCG series features zero backlash – no rotational clearance, ensuring precise positioning for servo motors and encoders.

Q: Is the coupling maintenance-free?
A: Yes. The ultra-high viscosity grease is pre-filled in the slider gaps to prevent seizure and ensure zero backlash, requiring no maintenance.

Q: What is the temperature range?
A: The operating temperature range is -20°C to +80°C.

Q: What are the common applications?
A: Servo motors, stepper motors, food processing, packaging, CNC machines, chemical equipment, semiconductor, medical devices, and automation systems.

Q: Can the coupling withstand impact torque?
A: Yes. The DHCG series is designed to withstand impact torque up to 4 times the permissible torque without damage (FSPJU equivalent).

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

Request a Quote

Send us your model (e.g., DHCG-45×46), bore size, torque, speed, and application details. Our engineers will recommend the optimal model and provide a quotation within 24 hours.