General Breaker of Korea, also known as GB Industries, GB Hammer, and GB Breaker is a South Korean hydraulic breaker manufacturer that was formerly carried in the United States in California by Mostar of Fontana, California, and Hammerco of Norco, California.

Offering mostly nitrogen-fired hydraulic hammers, GB began with their “T” “F” and “E” series.

Almost all of General Breaker’s “T” series used an internal valve and did not use an accumulator.

Almost all of GB “F” series of hydraulic breakers used an internal valve with an accumulator.

General Breakers “E” series used an external valve and an accumulator.

Early General Breaker GB hydraulic breaker models

GBM60 GBM90

GB1T GB2T GB3T GB3TP GB4T GB5T 

GB150 GB6T GB8T GB7T GB8AT GB11T 

GB8F GB9F GB11F GB14F  

GB170E GB200E GB220E GB300E GB320E GB500E GB520E GB530E GB540E GB600E GB630E

General Breaker GB hydraulic hammer models next added some other models:

GBM60 GBM90 GBM120

Currently, General Breaker hydraulic hammers use the following models:

GBP10 GBP20 GBP30 GBP35 GBP40 GBP43

These GBP GB Hammers are known as the Unicon series. They do not use tie rods or side bolts and are for skid steers, mini-excavators, and backhoes from .8 to 9 tons in weight. They utilize smaller demolition tool diameters ranging from 40mm to 75mm.

GB breakers standard and heavy-duty lines:

GBN10T GBN20T GBN30T GBN45T GBN60T GBN70T GBN100T GBN140T GBN170T GBN210T GBN220T GBN400T

GBN170E GBN220E GBN300E GBN400E GBN645E GBN745E GBN770E GBN800E GBN900E GBN1000E

GBN745EHDL GBN745EHD GBN770EHD GBN800EHD GBN900EHD GBN1000EHD

General Breaker also added a fully hydraulic breaker line that uses a top accumulator like Rammer, Tramac/Montabert etc..

Those GB hydraulic hammer models are:

GBN150H GBN180H GBN210H GBN260H GBN300H GBN380H GBN480H GBN680H

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