Harper Air Tool Rock Drills (Sinkers) and Jackhammers

HATCO ROCK DRILLS FEATURE

Drop Forged Construction - Automatic Rotation - Replaceable Chuck Bushing or Chuck

Swivel Air Inlet, except 4102 & 4105

Replaceable Piston Stem Bearing - Latch or Yoke Retainer - Rubber Handle Grips

Multiple Drilling Speeds with Four Position Throttle (except 4102, 4103 & 4105)

Compression Spring Loaded Pawls for Positive Rotation

55 Lb. Class - Dry or Wet Type
Model 4112 - 7/8" HX x 3 1/4" CK
Model 4114 - 7/8" HX x 4 1/4" CK
Model 4115 - 1" HX x 4 1/4" CK

35 Lb. Class - Dry Type
Latch Retainer
Model 4108 - 7/8" HX x 3 1/4" CK
Model 4110 - 7/8" HX x 4 1/4" CK

8 Lb. Class - Dry Type
Model 4105 - .573" HX CK
(Utility Drill)

55 Lb. Class - Dry or Wet Type
Latch Retainer
Model 4119D7x3 - 7/8" HX x 3 1/4" CK
Model 4119D7x4 - 7/8" HX x 4 1/4" CK
Model 4119D1x4 - 1" HX x 4 1/4" CK
Model 4119W7x3 - 7/8" HX x 3 1/4" CK
Model 4119W7x4 - 7/8" HX x 4 1/4" CK
Model 4119W1x4 - 1" HX x 4 1/4" CK

40/45 Lb. Class - Dry or Wet Type
Latch Retainer
Model 4116D7x3 - 7/8" HX x 3 1/4" CK
Model 4116D7x4 - 7/8" HX x 4 1/4" CK
Model 4116D1x4 - 1" HX x 4 1/4" CK
Model 4116W7x3 - 7/8" HX x 3 1/4" CK
Model 4116W7x4 - 7/8" HX x 4 1/4" CK
Model 4116W1x4 - 1" HX x 4 1/4" CK

15 Lb. Class - Dry Type
Latch Retainer
Model 4103 - 7/8" HX x 3 1/4" CK
Model 4103/4 - 7/8" HX x 4 1/4" CK

Wet (Water)
Backhead Assembly

CONVERSION TABLE

3/4" HX x 3 1/4" CK (19mm x 82.6mm)

7/8" HX x 3 1/4" CK (22.2mm x 82.6mm)

7/8" HX x 4 1/4" CK (22.2mm x 108mm)

1" HX x 4 1/4" CK (25.4mm x 108mm)

View Specs