General Breaker · Korea
The full GB breaker range.
Thirty-six models across four series, covering carriers from 0.8 tonne to 150 tonne. GB build every one of them at Siheung, and we are the only source for them in Ireland. Rock breaker, hydraulic hammer or rock hammer — the whole GB range is on this page, model by model.
The four GB breaker series
GBN T-series
Twelve models, 0.8 to 40 tonne. Internal valve, simple build, the volume range.
GBN E and HD
Ten models, 14 to 150 tonne. External valve with common parts, and the HD models for hard rock.
Unicon GBP
Six models, 0.8 to 9 tonne. One-piece body — nothing to work loose, nothing to re-torque.
GBH full hydraulic
Eight models, 13 to 75 tonne. Top-mounted accumulator, quieter, wide flow tolerance.
T-series
GBN T-series — 0.8 to 40 tonne.
The range most people mean when they say GB. Internal valve type, no accumulator below the 210T, and priced to be the sensible second hammer rather than the precious one.
Options worth knowing about
Auto-grease is available from the GBN70T up, anti blank-fire on the 140T, 210T and 220T, and an underwater air-vent kit from the 60T up. None of it is standard, so it is worth deciding at order time rather than retro-fitting.
Weights shown are the silenced (boxed) version. Open-top versions are available and differ — ask if that is what you want.
In stock now in Ballyclare: GBN 10T (open-top), GBN 30TL, GBN 60TL and GBN 140TL — see the shop.
GBN T-series — full specifications (12 models)
| Model | Carrier | Operating weight | Tool dia. | Oil flow | Pressure | Impact rate |
|---|---|---|---|---|---|---|
| GBN10T | 0.8–2.5 t | 135 kg | 40 mm | 15–30 l/min | 80–100 bar | 800–1,400 bpm |
| GBN20T | 1.2–3 t | 145 kg | 45 mm | 20–35 l/min | 80–100 bar | 700–1,200 bpm |
| GBN30T | 2.5–4.5 t | 180 kg | 53 mm | 25–50 l/min | 90–120 bar | 600–1,100 bpm |
| GBN45T | 3–5.5 t | 250 kg | 60 mm | 30–60 l/min | 100–130 bar | 500–1,000 bpm |
| GBN60T | 3.5–7 t | 310 kg | 70 mm | 34–60 l/min | 95–130 bar | 450–1,000 bpm |
| GBN70T | 6–9 t | 380 kg | 75 mm | 40–80 l/min | 100–140 bar | 475–950 bpm |
| GBN100T | 6–13 t | 570 kg | 90 mm | 45–85 l/min | 130–160 bar | 480–850 bpm |
| GBN140T | 10–17 t | 890 kg | 100 mm | 85–110 l/min | 150–170 bar | 450–780 bpm |
| GBN170T | 15–20 t | 1,200 kg | 125 mm | 100–120 l/min | 150–170 bar | 420–730 bpm |
| GBN210T | 18–28 t | 1,700 kg | 135 mm | 120–150 l/min | 160–180 bar | 350–680 bpm |
| GBN220T | 20–30 t | 1,930 kg | 140 mm | 120–150 l/min | 160–180 bar | 280–550 bpm |
| GBN400T | 28–40 t | 2,400 kg | 155 mm | 160–240 l/min | 160–180 bar | 280–550 bpm |
E and HD series
GBN E-series — 14 to 150 tonne.
External valve type. The parts are shared widely across the range, which is the whole argument for them: cheaper to service and easier to get moving again. The HD models from the GBN645E up are built specifically for hard rock.
Where E-series earns its keep
Auto-grease and an underwater kit are available on every model in this band. The GBN1000E is a 10.5 tonne hammer on a 70 to 150 tonne machine, taking 360 to 430 litres a minute — quarry primary work, not demolition.
Note the overlap: several models suit a 33 to 50 tonne carrier but hit very differently. That is a conversation, not a spec sheet decision.
GBN E-series — full specifications (10 models)
| Model | Carrier | Operating weight | Tool dia. | Oil flow | Pressure | Impact rate |
|---|---|---|---|---|---|---|
| GBN170E | 14–20 t | 1,120 kg | 120 mm | 90–120 l/min | 150–170 bar | 400–750 bpm |
| GBN220E | 18–28 t | 1,750 kg | 135 mm | 125–150 l/min | 160–180 bar | 350–700 bpm |
| GBN300E | 24–36 t | 2,200 kg | 150 mm | 150–190 l/min | 160–180 bar | 300–650 bpm |
| GBN400E | 33–50 t | 2,800 kg | 160 mm | 180–250 l/min | 160–180 bar | 260–450 bpm |
| GBN645E | 33–50 t | 2,850 kg | 155 mm | 180–250 l/min | 150–190 bar | 300–500 bpm |
| GBN745E | 33–50 t | 3,300 kg | 165 mm | 180–250 l/min | 160–190 bar | 300–500 bpm |
| GBN770E | 45–55 t | 3,800 kg | 175 mm | 210–280 l/min | 160–200 bar | 250–500 bpm |
| GBN800E | 45–70 t | 4,800 kg | 190 mm | 220–290 l/min | 160–200 bar | 250–500 bpm |
| GBN900E | 55–100 t | 6,300 kg | 208 mm | 230–300 l/min | 180–205 bar | 170–220 bpm |
| GBN1000E | 70–150 t | 10,500 kg | 230 mm | 360–430 l/min | 220–240 bar | 140–170 bpm |
Unicon
GBP series — the uni-body breaker.
One-piece body rather than a through-bolted stack. No through bolts to work loose and no re-torquing schedule — which on a small hammer that lives on a hire fleet is worth more than it sounds.
Six models, 0.8 to 9 tonne
Same carrier band as the smaller T-series but a different build. Lighter for the same tool diameter, and less to go wrong when it is being used by somebody who is not the owner.
We stock the whole Unicon range in Ballyclare — the six below plus the baby GBP 06 for 0.2 to 1.2 tonne micro diggers (43 kg, 40 mm tool). See the shop for current stock.
GBP series — full specifications (6 models)
| Model | Carrier | Operating weight | Tool dia. | Oil flow | Pressure | Impact rate |
|---|---|---|---|---|---|---|
| GBP 10 | 0.8–2.5 t | 63 kg | 40 mm | 15–30 l/min | 90–120 bar | 800–1,400 bpm |
| GBP 20 | 1.2–3 t | 85 kg | 45 mm | 20–40 l/min | 90–120 bar | 700–1,200 bpm |
| GBP 30 | 2.5–4.5 t | 107 kg | 53 mm | 25–50 l/min | 90–120 bar | 600–1,100 bpm |
| GBP 35 | 3–5.5 t | 191 kg | 60 mm | 30–60 l/min | 100–130 bar | 500–1,000 bpm |
| GBP 40 | 4–7 t | 211 kg | 68 mm | 40–70 l/min | 110–140 bar | 500–900 bpm |
| GBP 43 | 6–9 t | 265 kg | 75 mm | 50–90 l/min | 120–150 bar | 400–800 bpm |
Full hydraulic
GBH series — 13 to 75 tonne.
Top-mounted accumulator, which lets the hammer accept a much wider range of oil flow and protects the carrier from hydraulic shock. Quieter than the equivalent T or E model, and the one to look at if noise is a site constraint.
Noise figures published
GB publish sound levels for this series: 94 to 99 LpA and 122 to 127 LwA across the range. If you are working anywhere with a noise limit, that matters more than blow rate.
Auto-grease pump available on every model.
GBH series — full specifications (8 models)
| Model | Carrier | Operating weight | Tool dia. | Oil flow | Pressure | Impact rate |
|---|---|---|---|---|---|---|
| GBN150H | 13–20 t | 1,123 kg | 115 mm | 70–110 l/min | 140 bar | 350–550 bpm |
| GBN180H | 18–25 t | 1,500 kg | 120 mm | 110–150 l/min | 140 bar | 400–500 bpm |
| GBN210H | 21–30 t | 1,874 kg | 130 mm | 120–160 l/min | 140 bar | 350–500 bpm |
| GBN260H | 21–31 t | 1,920 kg | 135 mm | 120–160 l/min | 140 bar | 350–500 bpm |
| GBN300H | 26–38 t | 2,396 kg | 140 mm | 160–230 l/min | 140 bar | 360–520 bpm |
| GBN380H | 33–48 t | 3,006 kg | 155 mm | 170–240 l/min | 145 bar | 320–420 bpm |
| GBN480H | 43–63 t | 3,920 kg | 170 mm | 190–250 l/min | 155 bar | 300–400 bpm |
| GBN680H | 52–75 t | 4,682 kg | 180 mm | 220–350 l/min | 155 bar | 250–350 bpm |
All figures are GB’s published specifications. Operating weights are the silenced version including tool and mounting. Send us your carrier make, model and available flow and we will confirm the right model before anything is ordered.
The rest of the range
GB do more than breakers.
Compactors, crushers, pulverizers, grapples and vibro equipment, all built in the same factory.
Tell us the carrier and the job.
We’ll tell you the right tool.
Tell us the make, model and weight of the carrier and what you’re breaking. We’ll come back with the breaker that suits it and a price — usually the same working day.
Ballyclare, Co. Antrim, BT39 9EB