Goliath 4 x 0.5 MF Spiral Point (Gun) HSS-Co5 Bright Machine Tap
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Goliath is an Australian precision cutting tool brand supplying HSS taps, threading dies, tap and die sets, thread gauges, and key steel to engineering, manufacturing, maintenance, and toolmaking operations across Australia. This page covers the Goliath MF Spiral Point (Gun) HSS-Co5 Bright Machine Tap, available in 12 diameter options: 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm and 4 more.
Goliath HSS-Co5 cobalt spiral point gun taps cut internal threads in through holes at machine speeds, pushing chips ahead of the cutting edge.
Where this product is used
Goliath spiral point machine tap products are used across engineering workshops, production machining, and industrial maintenance programs.
- High-speed tapping of through holes where chips can be pushed ahead of the cutting edge.
- CNC and production threading in mild steel, aluminium, and non-ferrous materials.
- Production environments requiring fast, efficient internal thread cutting in through-hole applications.
Key specifications
| Specification | Detail |
|---|---|
| Material Grade | HSS-Co5 Cobalt |
Selecting the right option
Spiral point (gun) taps suit through-hole tapping — chips are pushed ahead of the cut, not back through the hole. HSS-Co5 cobalt grade suits harder materials and machine-speed production tapping. Do not use gun taps in blind holes — chips have nowhere to go and will pack, causing breakage.
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Goliath MF Spiral Point (Gun) HSS-Co5 Bright Machine Tap: 4mm / 0.5mm
SKU: A0195679 | Model: A35XEE2SP
This is the diameter 4mm, pitch 0.5mm option of the Goliath MF Spiral Point (Gun) HSS-Co5 Bright Machine Tap. Key details for this option: thread form type Metric Fine, drill diameter 3.5mm, length overall 53mm.
Goliath MF Spiral Point (Gun) HSS-Co5 Bright Machine Tap
HSS-Co (Cobalt) Bright Finish Metric Fine Spiral Point Machine Tap.
HSS-Co Spiral Point (Gun Nose) Taps.
Spiral point taps, also known as 'Gun nose taps', have straight flutes supplemented by angular cutting faces at the lead.
The design of the cutting portion propels the swarf ahead of the tap leaving the flutes clear for the flow of coolant to the cutting teeth.
Primarily designed for use in through holes, these taps can be used in blind holes provided that there is ample clearance beyond the threaded section to accommodate the swarf.
The advantages of a gun nose tap are the shearing action of the angular cutting faces, which produces a fine finish on the threads and shallower flutes.
This allows a stronger cross-section throughout the tap.
The metric Fine angle of the thread is 60 degrees. The crest is flat and the thread has clearance at the root allowing external thread and internal thread to engage well.
A Larger root radius and lower thread height enable easy screw thread processing and increase thread screw strength.
The major diameter of the external thread and pitch are specified by a simple numerical value (most commonly measured in millimetres).
Manufactured from HSS-Co5, this modern design tap uses straight flutes supplemented by angular cutting faces at the point to produce a fine finish on the threads.
Shallower flutes achieve a stronger cross section allowing the tap to withstand greater cutting forces.