BSPP(G) Multi-Form 55 degree Thread Mill | Solid Carbide Thread Milling Cutter

Explore solid carbide multi-form thread milling cutters for precise internal and external 55° BSP threads.

Thread milling pipe threads capability enhanced by a precision-engineered 55 degree thread mill.
Available in uncoated, AlTiN, TiAlN, and DLC coatings.
Supports both right-hand and left-hand threads.
High performance thread mill bit at competitive prices.

Overview

The G Multi-Form Thread Mill is a solid carbide thread milling cutter designed for machining parallel pipe threads with high accuracy and efficiency. Globally, G threads are also referred to as:

BSPP (British Standard Pipe Parallel)
PF Thread (Japan JIS Standard)
ISO 228 Parallel Pipe Thread

Thanks to its full-profile cutting design, this tool can process internal and external threads, in both left-hand and right-hand directions, with consistent precision. It is a reliable solution for industries that require tight tolerance pipe connections such as aerospace, automotive, oil & gas, hydraulics, and general machinery.

Applications

The G Multi-Form Thread Mill is widely used in:

Aerospace: hydraulic fittings, fuel systems
Automotive: engine and transmission components
Oil & Gas: threaded pipe joints, valves
General Engineering: machinery, pumps, pneumatics

Why Choose a Multi-Form Thread Mill?

Universal compatibility with G / BSPP / PF / ISO 228 standards
Solid tungsten carbide for durability and long tool life
Multi-form geometry for one-pass threading with superior accuracy
CNC optimized – suitable for high-speed, high-precision machining
Adaptable to different materials through specialized coatings
Capable of left-hand, right-hand, internal, and external threads

How to Choose a Carbide Thread Mill?

Material & Coating Recommendations

Material	Recommended Coating	Benefits
Copper & Aluminum	TiB₂ / DLC / no coating	Prevents built-up edge, smooth chip evacuation
45# Steel / Carbon Steel	TiN / TiCN	Cost-effective, reduces wear
Stainless Steel	TiAlN / AlCrN	High heat resistance, prevents galling
P20 Tool Steel	TiAlN / AlTiN	Long life in tough tool steels
Cast Iron	TiN / TiAlN	Excellent wear resistance, stable cutting
Titanium Alloys	AlTiN / TiAlSiN	Withstands high temperatures, prevents chipping
Heat-Resistant Alloys	AlCrN / TiAlSiN	Superior oxidation resistance

Choosing the right coating is one of the key factors that influence machining performance, tool life, and surface finish.

Single-Form vs. Multi-Form Thread Mills

When selecting a thread milling tool, both single-tooth (single point) and full-form thread mills are available:

Type	Advantages	Limitations
Single-Form	Flexible, can cut multiple thread pitches with one tool Ideal for small batches or prototypes	Slower cutting speed Multiple passes needed
Multi-Form	Much faster, mills the entire thread profile in fewer passes Consistent thread quality – Ideal for mass production	Limited to specific thread pitch Higher initial tool cost

At our Minnexon, we can supply both single-form and multi-form thread mills, ensuring you always have the right solution for your production needs.

Technical Specifications (Customizable)

BSPP/G	TPI	Pitch	d1/mm	L1/mm	D/mm	L/mm	Flutes	Drill dia./mm	Unit Price/USD
G1/16-28	28	0.907	5.8	17	6	60	3	6.7	US$74.00
G1/8-28	28	0.907	7.7	20	8	60	4	8.7	US$108.00
G1/4-19	19	1.337	9.9	27	10	75	4	11.8	US$132.00
G3/8-19	19	1.337	11.9	26.7	12	75	4	15.2	US$166.00
G1/2-14&G3/4-14	14	1.814	11.9	30	12	75	4	19	US$166.00
G1/2-14&G3/4-14	14	1.814	11.9	35	12	83	4	19	US$166.00
G1/2-14&G3/4-14	14	1.814	15.7	40	16	100	5	19	US$304.00
G1-11	11	2.309	16	42	16	100	5	30.7	US$304.00
G2-11	11	2.309	19.9	42	20	100	5	30.7	US$388.00

How to Choose a Carbide Thread Mill

Choose the right carbide thread mill for better performance.
Select a proper coating to match the material. TiAlN or AlCrN works well for steel. Use TiCN for aluminum or copper.
Pick single-tooth cutters for small holes or fine threads.
Choose three-tooth or full-tooth cutters for higher speed and large threads.
Check the helix angle and cutting direction.
Use a positive rake for soft materials and a neutral rake for hard materials.
Always confirm tool diameter, pitch, and thread depth.
Right choice means longer tool life and cleaner threads.

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BSPP(G) Multi-Form 55 degree Thread Mill | Solid Carbide Thread Milling Cutter