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Hexagonal Flexible Coupling Element / 50A Hexagonal Flexible Coupling Bushing‑NBR For Construction & Heavy‑Duty Machinery
| Place of Origin | TAIWAN |
|---|---|
| Brand Name | Pro-one |
| Model Number | 50A |
| Minimum Order Quantity | 2 SET |
| Price | Negotiation |
| Packaging Details | Origin Country Of Factory Packaging |
| Delivery Time | 1 Day For Stocks, 15-30 Days For Large order After Payment |
| Payment Terms | Western Union,Cash,Bank,PayPal.HSBC,CITY BANK. |
| Supply Ability | 30000 SET /MONTH |
Product Details
| Material | Rubber NBR | Appliion | Excavator & Mechanical Rotary Drilling |
|---|---|---|---|
| Part Name | Coupling | Brand Name | PRO-one |
| Part Number | 50A | Packing | Carton |
| Delivery Time | 1-2 Days For Stocks After Payment, 15-30 Days For Large Orders | Sales Type | Retail, Wholesale |
| Available | In Stock | ||
| Highlight | Hexagonal Flexible Coupling Bushing NBR,50A Flexible Coupling for Heavy-Duty Machinery,Rubber Coupling Spider for Construction |
||
Product Description
50A Hexagonal Flexible Coupling Bushing / Hexagon Coupling Element
Pro-One 50A Hexagonal Flexible Coupling Bushing made from heavy-duty modified NBR compound, designed for construction and heavy-duty machinery applications. Features excellent oil resistance, anti-ozone aging, and superior torsional vibration absorption.
Product Specifications
| Item | Specification Details |
|---|---|
| Place of Origin | Taiwan, China |
| Brand Name | Pro-one |
| Model Number | 50A Hexagonal Flexible Coupling Bushing |
| Minimum Order Quantity | 2 SET |
| Price | Negotiable, extra discount for bulk heavy-equipment wholesaler |
| Packaging Details | Independent anti-collision PE bag with desiccant, shock-proof kraft color carton; moisture-proof packing for dusty construction site long-term storage |
| Delivery Time | 1-2 working days for stocked goods; 15-30 working days for mass bulk orders after payment |
| Payment Terms | Western Union, Cash, Bank Transfer, PayPal, HSBC, CITY BANK |
| Supply Ability | 30000 SET / MONTH, stable continuous output for heavy-duty aftermarket |
Technical Performance Details
| Core Performance Advantages | Matching Model |
|---|---|
| Formulated heavy-duty NBR compound, low compression-set, excellent oil-resistance, anti-ozone aging, strong torsional vibration absorption, good angular-radial-axial misalignment compensation, resist frequent shock load under heavy-duty site, anti-swelling against hydraulic oil and diesel splashing | 50A Hexagon coupling element, compatible for excavator main hydraulic pump drive system, heavy-duty rotary drill rig, wheel loader, industrial hydraulic power unit |
| Main Material | Application Range |
| Heavy-duty modified NBR (Nitrile Butadiene Rubber, 88-90 Shore A hardness) | Construction machinery, heavy-duty mining equipment, industrial hydraulic station, engineering pump transmission assembly, heavy-load power take-off system |
| Applicable Machine Types | Related Coupling Series |
| Excavator, rotary drilling rig, wheel loader, bulldozer, mining auxiliary machinery, heavy-duty stationary hydraulic unit | 4A,4AS,8A,8AS,16A,16AS,22A,22AS,25A,25AS,28A,28AS,30A,30AS,50A,50AC,50AS,80A,80AS,90A,90AS,140A,140AS |
| Working Temperature Range | Sales Type |
| -30℃ ~ +110℃ | Retail, Wholesale, After-market OEM supply |
| Standard Color | Nominal Torque |
| Black | 850 Nm |
| Maximum Surge Torque | Max Rotational Speed |
| 2200 Nm | 3800 Min-1 |
Differentiated Highlights
- Specially modified heavy-duty NBR formula, less permanent deformation under cyclic torsional shock vs ordinary standard NBR couplings
- Hexagonal integrated elastic structure, evenly disperse multi-direction impact force, reduce local stress concentration
- Superior anti-swelling performance when exposed to hydraulic oil, engine oil and diesel splashes on construction sites
- Good vibration-damping effect to protect hydraulic pump and engine against torque shock damage
- Compact structure, no lubrication required, easy on-site replacement, no complicated assembly tools needed
- Direct dimensional replacement for original 50A coupling element, no mechanical modification required
Technical Data
Material
Heavy-duty modified NBR (88-90 Shore A)
Nominal Torque
850 Nm
Max Surge Torque
2200 Nm
Maximum Rotational Speed
3800 Min-1
Operating Temperature
-30℃ ~ +110℃
Application
Excavator hydraulic pump drive, rotary drilling rig, wheel loader, mining auxiliary equipment, heavy-duty industrial hydraulic power unit.
This 50A hexagonal flexible coupling bushing adopts upgraded modified NBR elastomer, different from conventional general-purpose 50A rubber coupling. Optimized NBR compound greatly improves oil-resistance and anti-fatigue performance for heavy-duty working scenarios. The special hexagonal elastic structure evenly distributes torsional load, absorbs start-stop shock and torsional vibration, compensates shaft misalignment effectively. It helps to extend service life of connected hydraulic pump and engine components. Zero lubrication requirement lowers daily maintenance cost for construction fleets.
Full Related Coupling Series
4A, 4AS, 8A, 8AS, 16A, 16AS, 22A, 22AS, 25A, 25AS, 28A, 28AS, 30A, 30AS, 50A, 50AC, 50AS, 80A, 80AS, 90A, 90AS, 140A, 140AS
Packaging & Delivery
Packaging Details
Each single hexagonal coupling bushing packed with individual anti-collision PE plastic bag with desiccant inside. Full set packed into moisture-proof kraft color carton. Custom OEM private-label sticker and customized color box service are available for distributors.
Delivery Time
1-2 working days dispatch for in-stock orders after payment confirmation. 15-30 working days production cycle for large-volume bulk orders.
Our Core Advantages
- Comprehensive spare-parts database. Please offer machine model, part number or dimension drawing, we can match the correct hexagonal coupling bushing for your equipment.
- Professional sales team with more than 7-year experience focusing on engineering transmission spare-parts, provide quick technical suggestion for heavy-duty working condition selection.
- Strict pre-shipment verification: Every batch will be checked dimension, rubber hardness and surface condition one-by-one before shipment to guarantee correct quantity and qualified quality.
- Free export document service for all orders, no matter small retail order or large wholesale bulk order.
- Fast response for after-sales consultation. We will analyze failure cause and provide practical solution when customers meet installation or application problems.
Covered Machine Brands & Models
Komatsu
PC45MR PC56-7 PC60-7 PC70-8 PC60-6 PC40-7 PC40-8 PC60-2 PC60-5 PC60-6 PC75 PC100-5 PC120-6 PC150-5 PC130-7 PC200-3 PC200-6 PC200-8 PC210LC-8 PC220-8 PC240LC-8 PC300-3 PC300-5 PC300-6 PC300-7 PC360-7 PC400-3 PC400-5 PC600-6
Hitachi
ZX60 ZX70 ZX100M-1 ZX120 EX60 EX60-2 EX60-3 EX60-7 EX100-1 EX120-5 EX120-6 ZX200 ZX200-3 ZX230 ZX240 ZX240-3 EX200-1 EX200-2 EX200-3 EX200-5 EX200-6 EX210-2 EX220-2 EX220-3 EX225-5 EX270 EX300-1 EX300-2 ZX330-3 ZX450H EX300-5
CAT
312, 315, 302.5C, 324D, 320D, 330, 329D, E200B, E240, 320, 320C
Hyundai
R60-7,130,R200-5,R215-7,R225-9,R210W-7,R220-5,R250-7,R260-7,R290-3,R300-5 R375-7,R305-7,R335-7,R300-3,R450
Kobelco
SK07 SK60 SK75 SK60-8 SK120 SK120-3 SK130 SK200-8 SK200-6 SK250-8 SK210-6 SK220-1 SK230-6 SK250-6 SK200-8 SK210-8 SK300-3 SK330-6
Doosan / Daewoo
DH60-7 DH80-7 DH130 DH215-7 DH215-9 DH220-5 DH220-2 DH220-3 DH225-7 DH280-3 DH150 DH300 DH330-3 DH300-5 DH420LC-7 DH300-7
EC Series
EC210BLC EC140BLC EC290B EC360B, 210, 240
Sumitomo
SH120 SH75 SH100 S280 S280FA S280F2 S281 S340 S265F2, SH200 SH200A3
Kato
HD550 HD450 HD800-7 HD400SEM HD700-2 HD700-5 HD700-7 HD800SD-5 HD900-7 HD820-2 HD820 HD770-1 HD770-2 HD880-1 HD850 HD250 HD400
Chinese Local Brands
CLG200, Sunward60, Sunward70, XG820 and other heavy-duty industrial pump transmission equipment
Product Images
Frequently Asked Questions
Q1: What is the difference between this 50A hexagonal NBR coupling bushing and ordinary standard 50A rubber coupling?
A1: Our product uses specially modified heavy-duty NBR compound instead of general-purpose rubber. It delivers lower compression set, better oil-resistance and anti-ozone aging performance. The optimized hexagonal geometry disperses torsional stress evenly, reduces local tearing risk under frequent shock load. It can resist hydraulic oil splashing on construction sites and extend service life under heavy cyclic impact, solving common early-failure issues of ordinary rubber couplings such as swelling, cracking and permanent deformation.
Q2: What machines can this 50A hexagon coupling element fit for?
A2: It is widely used for excavator hydraulic pump drive, rotary drilling rigs, wheel loaders, bulldozers, mining auxiliary machinery and heavy-duty industrial hydraulic power units. It is a direct replacement for original 50A coupling for Komatsu, Hitachi, CAT, Hyundai, Kobelco and other mainstream construction machinery brands.
Q3: Do I need modification when installing this hexagonal coupling bushing?
A3: No modification is required. Strictly manufactured per original 50A dimension standard. Customers can directly replace old coupling element, quick field maintenance without special custom machining.
Q4: What are working temperature and torque parameters for this NBR hexagonal coupling bushing?
A4: Working temperature ranges from -30℃ to +110℃, adapts for cold winter and high-temperature continuous-running construction conditions. Nominal torque reaches 850Nm, maximum surge torque up to 2200Nm, maximum rotational speed 3800 Min-1, stable performance under frequent start-stop heavy-impact operation.
Q5: Do you accept small trial orders for repair shops?
A5: Yes, MOQ is 2 sets. Small trial orders are supported for machinery repair shops and retail buyers. We also provide volume discount for large wholesale orders from construction spare-parts distributors.
Q6: What about delivery time and available shipping options?
A6: In-stock goods can be dispatched within 1-2 working days after payment. Bulk custom orders take 15-30 working days. Global shipping options are available: sea freight for large-volume goods; DHL, FEDEX, EMS air express for urgent maintenance orders.
Q7: What payment methods do you accept for overseas customers?
A7: We accept multiple cross-border payment options including Western Union, Cash, Bank Transfer, PayPal, HSBC and CITY BANK international transfers to satisfy global dealers' demands.
Q8: What maintenance work does this hexagonal flexible coupling bushing require during service?
A8: It is maintenance-free design, no grease or lubricant needed. Just regularly check for surface crack or deformation during routine equipment inspection. It helps reduce daily fleet maintenance cost for construction machinery.
Q9: How do you control product quality and guarantee after-sales support?
A9: Every batch undergoes strict dimension inspection, NBR hardness test and surface visual screening before shipment. We provide fast technical support within 24 hours if customers face installation trouble or quality doubts. We actively collect site feedback and offer practical troubleshooting advice for coupling-related transmission failure.
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