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  3" Mach 303 cutaway

3" - Mach 303

Available Shank: Halco Mach 303

Mach 303 is a general purpose hammer for small hole drilling used in applications such as seismic, geological survey, micro-piling, floor, wall and roof-bolting, or for blast-holes where environmental considerations limit hole size and blasting procedures.

The Mach 303 uses less air than most other 3" hammers in its range, which allows you to use a smaller compressor and gain in economy. The hammer is suitable for drilling at a wide range of air pressures in both soft and hard rock conditions.

Suitable for operation at air pressures of 100 - 350 psi.
Drilling diameters of 3 3/8" - 4".

Click to enlarge
Mach 303 Air Consumption table
Figures are based on theoretical data.
 
 
Top-adaptor with integral N.R.V. (Non-Return-Valve) replaceable air distributor.
 
 
 
 
 
Simplified piston geometry for improved balance and location within the cylinder.
 
 
 
 
Revised chamber volumes and cycle timing to optimize performance.
 
 
 
 

Mach 303 part breakdown
Hammer Overview
Hammer Type
Mach 303
Shank
Halco Mach 303
Top Thread
2 3/8 API Reg Pin
Hammer Flat Size
2.362"
Weight
44.09 lbs.
Outside Diameter
3 1/32"
Make Up Length
32 1/3"
Recommended Minimum Thrust
330 lbs.
Recommended Maximum Thrust
660 lbs.
Parts List
Hammer Type
Mach 303
Shank
Halco
Item
Description
1
Thread Protector
2
Top-Adaptor
3
O-Ring
4
N.R.V.
5
N.R.V. Spring
6
N.R.V. Housing
7
Disk Springs
8
Thrust Washer
9
O-Ring
10
Air Distributor
 
Air Distributor Removal Tool
11
Snap Ring
12
Piston
13
Cylinder
14
Snap Ring
15
Bit Retaining Ring
16
Chuck Lock Ring
17
Chuck Spacer
18
Chuck
19
End Cap
Service Kit, Repair Kit, Foot Valve, F/V Tool (Body), and F/V Tool (Pusher) available
Drill Bits
Halco Shank - Mach 303
Diameter
Face Design
Button Type
Button Qty./Dia.
Weight
3 11/32"/85 mm
Convex
Domed
11 x 11 mm
7.94 lbs.
3 1/2"/90 mm
Convex
Domed
11 x 11 mm
8.16 lbs.
3 1/2"/90 mm
Convex
Semi-Ballistic
13 x 11 mm
8.16 lbs.
3 15/16"/100 mm
Flat
Domed
16 x 11 mm
9.92 lbs.