Technical Specification

Sinker Drill Model #	RMT 658 Pneumatic Rock Drill
Weight	24 kg	53 lb
Length	565 mm	22.2″
Hole range	27 mm – 40 mm	1.06″ – 1.57″
Hole depth	6 metres	19.6 ft
Air pressure	6 bar	87 psi
Air consumption	58 l/s	123 cfm
Blow per minute	2040
Revolution	215 rpm
Piston dia	65 mm	2.56″
Piston stroke	59 mm	2.32″
Air inlet (BSP)	19 mm	3/4″
Shank size – 8311 0301 86	22 x 108 mm	7/8″ x 4¼”

RMT 658

RMT 658 is the most popular hand held rock drill (Jack Hammer), globally. In relation to weight, it delivers very high penetration rate at very low air consumption. Mostly used in Quarry work, Blast hole drilling, Tunneling, construction sites etc. With H22 integral / extension steels, it can drill up to 6 meter with 27-40 mm dia hole.