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Flexible Pin Bush Coupling Manufacturer in India

Our Products

Flexible Pin Bush Couplings

Quality Solutions for Every Industry

AniGears Pin-Bush Couplings are highly reliable, torsionally flexible couplings designed to transmit torque through a set of resilient rubber bushes mounted between two flanged hubs.

Each bush acts as a flexible link between the driving and driven pins, enabling the coupling to absorb shocks, damp vibrations, and compensate for small angular, parallel, and axial misalignments in connected shafts.


AniGears offers two design variants:
AP Series (Standard Pin-Bush Type): Equivalent to BC-type couplings, using cylindrical rubber bushes for medium-duty industrial drives.

AB Series (Barrel Bush Type): Equivalent to B-Flex type couplings, featuring specially contoured barrel-shaped bushes that provide enhanced misalignment capacity and superior shock absorption, making them ideal for heavy-duty and reversing drives.


Both designs ensure smooth, noiseless operation and long service life even under demanding operating conditions. They are simple in construction, easy to install, and require no lubrication, thereby ensuring maintenance-free service.

Flexible Pin Bush Couplings are designed to effectively transfer torque, damp vibration and compensate for misalignment in industrial drives. AniGears is an ISO 9001:2015 certified manufacturer of AP and AB Series couplings for pumps, compressors, conveyors, fans, and other heavy engineering applications across India.

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Selection Procedure

Your Guide to Choosing

Easily select the right products with our expert guidance, clear specifications, and tailored solutions.

01
Compute Design Power
02
Select the Coupling Size
03
Confirm Lubrication and Speed
Dimension Of Flexible Pin Bush Couplings

Technical Dimensions & Specifications

Accurate dimensional details to help you select the right coupling size for your application requirements.

Coupling Size Torque (Nm) Max. Speed (RPM) Bore Dia MIN Bore Dia MAX QTY N A B C D E F
AP 1 77 6100 12.7 30 3 95 79 38 3 44 58
AP 2 310 5100 12.7 35 4 114 99 48 3 51 70
AP 2A 516 4400 16 45 6 130 105 51 3 67 70
AP 3 621 3600 16 50 4 160 107 51 5 75 114
AP 4 831 3000 20 70 4 191 125 60 5 105 114
AP 4A 1241 3000 20 70 6 191 125 60 5 105 114
AP 5 1662 2600 25 80 6 225 157 76 5 115 114
AP 6 2359 2300 45 100 8 254 183 89 5 140 114
AP 6A 2932 2300 45 100 10 254 183 89 5 140 114
AP 6B 3533 2300 45 100 12 254 183 89 5 140 114
AP 7 4154 1950 55 120 12 290 235 115 5 175 114
AP 7A 5195 1900 55 125 14 300 235 115 5 185 130
AP 8 5816 1850 60 135 16 310 255 125 5 200 130
AP 8A 7268 1650 60 138 18 340 265 130 5 205 130
AP 8B 8729 1590 65 142 12 360 276 135 6 212 200
AP 9 9932 1470 70 152 13 390 316 155 6 225 200
AP 9A 13274 1400 80 162 15 410 336 165 6 240 200
AP 10 14420 1300 90 175 16 440 366 180 6 255 200
AP 10A 18050 1200 100 185 17 480 386 190 6 270 212
AP 11 23780 1080 110 195 20 530 406 200 6 285 212
Installation Steps

Coupling Installation Process

  • Centrifugal and slurry pumps
  • Belt and screw conveyors
  • Crushers, mixers, and agitators
  • Fans and blowers
  • Textile and paper machinery
  • Rolling mills, cement plants, and general industrial drives
Maintenance

Routine Maintenance Guide

  • Check pins, bushes, and flanges for wear, cracks, or damage.
  • Apply suitable lubricant periodically to reduce friction and increase life.
  • Ensure all bolts and nuts are properly tightened to avoid loosening during operation.
  • Verify shaft alignment to prevent excessive load and uneven wear.
  • Change damaged pins or bushes immediately to maintain smooth operation.
  • Remove dust, grease buildup, and debris to avoid performance issues.
Features & Benefits

Features of Pin Bush Couplings

Torsional Flexibility

The rubber bushes deform under load, reducing transmission of shock and torque fluctuations.

Vibration Damping

The flexible medium absorbs vibrations, reducing noise and extending equipment life.

Fail-Safe Operation:

Even under extreme overload or bush failure, metallic contact allows limited torque transmission to protect against total drive interruption.

No Lubrication Required:

Simplifies maintenance, prevents contamination, and ensures clean operation.

Misalignment Compensation

Capable of accommodating angular, parallel, and axial misalignments without imposing excessive reactionary forces on shafts or bearings.

Ease of Maintenance

Bushes are replaceable without disturbing the hubs or connected shafts.

High Misalignment Capacity

AP Series: Angular ±2°, Parallel ±2 mm
AB Series: Angular ±3°, Parallel ±3 mm

CED-Coated Hardware

Uniform coating ensures rust protection even in humid or outdoor environments.

What Is a Flexible Pin Bush Coupling?

  • A flexible pin bush coupling is a mechanical transmission device that affixes two shafts to reduce or eliminate shaft misalignment and transmission shock by coupling the shafts using a pair of metal pins and flexible rubber bushes.
  • In contrast to rigid couplings, pin bush couplings protect equipment attached to them from damage caused by varying torque or shaft movement. Pin bush couplings are simple and reliable, and they are used on pumps, compressors, conveyors, blowers, and other process machinery because of their low maintenance requirements.
  • AniGears designs and manufactures couplings for the permanent-duty industries where long life and reliability are important. They include standard AP Series barrel bush couplings as well as heavy-duty AB Series barrel bush couplings  for reversing drives and higher misalignment.
Applications by Industry

AniGears provides coupling solutions for a wide range of industries where rotating machinery needs to move reliably and efficiently.

Industries We Serve:

  • Cement plants
  • Steel and rolling mills
  • Textile machinery
  • Material handling systems
  • Mining equipment
  • Chemical processing plants
  • Power generation units
  • Paper and pulp industries
  • Food processing machinery
  • General engineering industries

Our Industrial Pin Bush Coupling range are designed to meet the demands of highly dynamic loads, high starting torque, and continuous production.

Advantages of Pin Bush Coupling

Features & Performance Benefits

AniGears couplings are designed to perform reliably in demanding industrial applications where vibration control and consistent power transfer are essential.

01
Torque transmission with reduced backlash.
02
Excellent vibration damping in various load conditions.
03
Shock load absorbing for motor and gearbox protection with a shock absorber.
04
Appropriate for angular, axial, and parallel shaft misalignment.
05
Almost maintenance-free with no requirement of lubrication.
06
Einfache bush replacement and easier installation.
07
Cast iron construction. Long service life.
08
Appropriate for continuous industrial operation.

The bush configuration reduces the impact load transmitted between the drive and driven shaft, helping to extend the service life of bearings and shafts. Compared with standard rigid couplings, rubber bush flexible couplings provide smoother operation and significantly reduce machine noise.

For applications requiring alternative flexible coupling designs, AniGears also offers tyre couplings and gear couplings for heavy-duty torque transmission systems.

Pin Bush Couplings for Pumps & Compressors

AniGears makes Pin Bush Coupling for Pumps where smooth startup, vibration isolation, shaft flexibility are important for system reliability. These couplings are commonly used in centrifugal pumps, water treatment systems, fire pumps, and process pumps.

The Pin Bush Coupling for Compressors is designed to handle the cyclic loading and operating vibration encountered in air compressors, refrigeration compressors, and industrial gas compressors. Its strong bush design lowers the shock transfer and maximizes equipment life.

Pin Bush Couplings for Conveyor & Material Handling

Conveyor drives and material handling systems can be under stress from sudden reloads, starting and stopping, and alignment issues. Pin bush couplings are used to cushion the shock and torque transfers between the motors, gearboxes, and conveyor shafts.

These couplings are commonly used in:

  • Belt conveyors
  • Bucket elevators
  • Packaging machinery
  • Crusher feeding systems
  • Bulk material transfer equipment
Technical Specifications (AP Series)

Construction Materials & Performance Characteristics

AniGears AP Series couplings are available in many sizes and torque ratings for various industrial applications. Standard configurations include graded cast iron flanges, high-strength steel pins, and durable rubber bushings.

Standard Construction Materials
Component Material
Body Cast Iron Grade 20
Pins & Nuts Carbon Steel
Bush Material Vulcanized Rubber
Surface Finish Industrial Protective Finish
Performance Characteristics
Feature Specification
Torque Capacity Suitable for medium to heavy-duty drives
Shaft Misalignment Angular, axial, and parallel compensation
Lubrication Not required
Operating Duty Continuous industrial operation
Maintenance Low maintenance

Details on dimensions, bore sizes, and torque ratings are listed in the tables of existing specifications on the product page.

Why Choose AniGears

Our Manufacturing Strengths

AniGears is a Pin Bush Coupling Manufacturer India serving process industries, heavy engineering, and OEMs.

The manufacturer is an ISO 9001:2015-certified company.
NABL lab testing for material verification.
15+ years of manufacturing experience.
Kolkata, West Bengal – Manufacturing hub for pan-India industrial supply.
AP Series (standard) and AB Series (heavy-duty/reversing drives) available.
Custom bore sizes and bulk order capability available.

As a leading pin bush coupling manufacturer Kolkata in India, AniGears takes care of the finest quality, timely delivery, and we strive to be the best. We are also a reliable pin bush coupling supplier West Bengal for OEMs and distributors.

AniGears also offers a number of  power transmission products for high reliability and durability in the industrial, laboratory, and factory environments.

FAQ's

Frequently Asked Questions

AP Series couplings are characterized by standard cylindrical rubber bushes for medium-duty applications. The AB Series couplings feature barrel-shaped bushes that provide greater flexibility, improved misalignment range, and more performance for heavy-duty or reversed drive applications.

These couplings can support angular, parallel, and axial shaft misalignment within the operating limits. The exact tolerance is dependent on the coupling size and operating conditions specified in the technical dimensions table.

No oil is needed because the rubber bush provides full movement without metal-to-metal contact in normal operation. This maintenance-free nature makes it more economical than traditional gear couplings.

Flexible pin bush couplings are widely used for pumps, compressors, conveyors, fans, blowers, textile machinery, cement plants, and rolling mills. They can be used in applications with vibration suppression and reliable torque transfer.

Yes, AniGears stocks couplings with custom bore sizes and configurations for customers. All products are manufactured in accordance with the ISO 9001 quality standards for OEM requirements, bulk orders, or replacements for industrial applications.
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