ABB HMB/AHMA Hydraulic Charging Gear
Replacement hydraulic charging gear for ABB HMB and AHMA hydraulic operating mechanisms. Bevel gear machined to OEM tooth count and dimensions, reverse-engineered from a sample when the OEM part is discontinued.
- OEMABB
- Part typeGear
- EquipmentABB HMB, AHMA hydraulic operating mechanisms
- AvailabilityBuilt to order / lead time confirmed at quote
Overview
The ABB HMB and AHMA hydraulic circuit breakers use a bevel gear in the spring-charging mechanism. When the gear wears or breaks, the spring can no longer charge and the breaker will not operate. Southern Switch machines a direct replacement to OEM tooth count and dimensional specification, reverse-engineered from a sample. Lead time is confirmed at quote.
Why this part fails
The charging gear is a high-cycle component. Each close-open operation drives the charging motor, which loads the gear teeth repeatedly under spring preload. OEM charging gears are susceptible to tooth shear after years of compressed spring cycles. A broken gear leaves the breaker unable to charge, typically discovered during a routine trip test or after a fault clears and the breaker fails to reclose.
Made to your sample or print
When a part is obsolete or unavailable, we reverse-engineer it from a sample, a drawing, or a model number and machine a precise replacement.
Stock, lead time & reverse engineering
Lead time is confirmed at quote; discontinued or hard-to-find parts are reverse-engineered from a sample, a drawing, or a model number. Based in Palm Harbor, FL, Southern Switch & Contacts manufactures and ships replacement parts to utilities nationwide, and has served the industry since 1982.
Send the model number, asset tag, or just a description, we’ll reply with pricing and lead time within one business day.
Net 30 with an accepted PO, no credit application required. How we do business →