Halco Rock Tools, UK Manufacturer of DTH Hammers and Bits. Halco pioneered the development and distribution of DTH hammers in the 1950s.
Head Designs
Convex Face
 
Strong design for all conditions especially hard abrasive rock.
 
Good balance of fast drilling and long service life.
Flat Face
 
Alternative design for all rock conditions especially fractured and fissured rock and changing formations.
Concave
 
Alternative design for all rock conditions, particularly deep hole drilling can improve hole alignment as a result of inverted pilot.
Drill Bit Overview
DHD380
Oversize
 
 
 
 
 
Y
Y
Part
Number
650977
650373
650074
650022
650389
653483
650898
653041
Diameter
(Weight)
(Kg)
51.44
51.5
54.25
56.9
64
70.6
83
84
Face
Buttons
mm
200
203
216
241
254
254
300
311
Inch
7 7/8
8
8 1/2
9 1/2
10
10
11 7/8
12 1/4
Qty & Dia
31 x 16mm
14 x 16mm / 10 x 20mm
20 x 20mm / 9 x 13mm Wear
10 x 16mm 18 x 20mm
11 x 16mm / 18 x 20mm
34x 18mm / 12 x 16mm Wear
34 x 20mm
42 x 20mm
Design
Concave
Concave
Concave
Concave
Concave
Concave
Concave
Convex
Type
Dome
Dome
Dome
Dome
Dome
Dome
Dome
Dome
Halco 8
Part
Number
650980
650938
650746
653510
650365
Diameter
Oversize
 
Face
Buttons
Weight
(Kg)
51.8
53
63.8
74.6
81.8
mm
203
216
254
290
311
Inch
8
8 1/2
10
11 3/8
12 1/4
Design
Convex
Convex
Convex
Convex
Convex
Type
Dome
Dome
Dome
Dome
Dome
Qty & Dia
21 x 20mm
21 x 20mm
21 x 20mm
38 x 16mm
29 x 20mm
QL80
Oversize
 
Weight
(Kg)
51
56.8
57
59.5
Part
Number
653379
653062
653399
653456
Diameter
Face
Buttons
mm
203
222
229
241
Inch
8
8 3/4
9
9 1/2
Type
Parabolic
Dome
Dome
Dome
Qty & Dia
24 x 18mm
14 x 18mm / 10 x 18mm Long
14 x 14mm
18 x 20mm / 14 x 16mm / 6 x 16mm retrak
Design
Concave
Concave
Concave
Convex
Additional bit configurations are available on request.