BELLMotor Couplers for Circulator Pumps

BELL & GOSSETT Circulating Pump Coupler: Mfr Part # 186003

The BELL & GOSSETT Circulating Pump Coupler, manufacturer part number 186003, is a rubber/steel motor coupler designed for use with Bell & Gossett E-60 series circulator pumps. It is compatible with Grainger part…

SKU 3G-OTH-83482

Brand

BELL

Item

& GOSSETT Circulating Pump Coupler: Mfr Part # 186003

Technical Specifications

BELL

Manufacturer Part Number

186003

Coupling Material

Rubber/Steel 

Compatible with Brand

Bell & Gossett 

Compatible with Series

E-60 

Compatible with Grainger Part Number

5YN77 

Compatible with Manufacturer Model Number

625T 

View Full Spec Sheet

Technical Documents

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BELL Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Frequently Asked Questions

What is the BELL & GOSSETT circulating pump coupler 186003 used for?

This rubber/steel coupler connects the motor shaft to the pump shaft on Bell & Gossett E-60 series circulator pumps. It transmits torque while dampening vibration, ensuring reliable fluid circulation in HVAC and hydronic heating systems across industrial and commercial facilities.

What are the specifications of the BELL & GOSSETT 186003 coupler?

The 186003 coupler is made of rubber and steel, compatible with Bell & Gossett E-60 series pumps and model 625T. It also matches Grainger part 5YN77. This motor coupler is designed for circulating pump applications requiring durable, vibration-resistant power transmission.

Where to buy the BELL & GOSSETT 186003 coupler worldwide?

3G Electric supplies the BELL & GOSSETT 186003 coupler to customers worldwide. As a global industrial sourcing partner, we handle logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this rubber/steel motor coupler.

How to install the BELL & GOSSETT 186003 coupler on a circulator pump?

Ensure the pump and motor shafts are clean and aligned. Slide the coupler onto the motor shaft, then align with the pump shaft and secure per manufacturer instructions. Check for free rotation before starting. For specific torque values, refer to the pump service manual.

Used in

Common applications for BELL

Hydronic heating systems — BELL & GOSSETT Series 60 circulator pump impellers (p82880) for closed-loop hot water circulation.

Commercial HVAC maintenance — BELL & GOSSETT flange hardware kits (P64910) for securing pump flanges in chiller and boiler rooms.

Industrial fluid handling — BELL & GOSSETT isolation flanges (101223LF) for isolating pumps in process piping systems.

Outdoor electrical installations — BELL weatherproof covers (5028-0) for protecting receptacles in NEMA 3R environments.

Floor box access in commercial buildings — BELL brass floor box covers (6249) for flush-mounted electrical outlets in concrete floors.

Pump repair and retrofit — BELL & GOSSETT bearing assemblies (189105LF) for in-line circulating pumps in Series PR applications.

BELL Products

3G Electric supplies BELL motor couplers for circulator pumps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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