gbr series dth hammers -www.尊龙凯时888

item description

weight(kg)

gbr1a

gbr2a

gbr3a

top sub

1.70

2.60

5.20

“o”type ring

0.10

0.10

0.10

check valve

0.10

0.10

0.10

spring

0.05

0.05

0.20

air distributor

0.80

0.60

0.80

internal  cylinder

0.80

0.80

1.30

piston

1.20

3.80

5.50

external  cylinder

4.00

4.50

9.50

guided sleeve

0.15

0.60

1.00

“o”ring of stop ring

0.005

0.005

0.05

stop ring

0.10

0.10

0.15

dirve chuck

0.80

1.20

2.00

drill bit

1.70

2.50

4.00

technical data

gbr1a

gbr2a

gbr3a

external  diameter

φ54mm

φ62mm

φ82mm

bit shank

br1

br2

br3

hole range

φ64-φ76mm

φ70-φ90mm

φ90-φ110mm

connection  thread

br40.box

rd50.box

api2 3/8”  reg

working pressure

1.0-1.5mpa

1.0-1.5mpa

1.0-1.5mpa

impact rate at  17bar

27hz

25hz

25hz

recommended  rotation speed

25-40r/min

25-40r/min

25-40r/min

air consumption

0.7mpa:1.5m3/min

0.7mpa:2.5m3/min

0.7mpa:4m3/min

1.0mpa:2.5m3/min

1.0mpa:4m3/min

1.0mpa:6m3/min

1.4mpa:3m3/min

1.4mpa:5m3/min

1.4mpa:8m3/min