Internal Carbide Thread Milling Cutter 20 TPI 1/4"x20 UNC

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Our Price: £30.00(Exc. 20% VAT)(£36.00 Inc. VAT)

Model: H060480N20
Brand: APT Carbide End Mills

Shipped Weight: 40 g

Availability:

Only 17 left in stock - order soon

APT Carbide End Mills

Carbide End Mills APT Brand

Internal Carbide Thread Milling Cutter 20 TPI 1/4"x20 UNC.

60° UN Unified Full Profile Defined by ANSI B 1.1:74 Tolerance Class 2A/2B.

Max Thread Depth = 2 x Diameter or less.

Suitable for Steel, Stainless Steel, High Temperature Alloys, Titanium Alloys, Aluminium, Copper and Copper Alloys, Cast Iron and Hardened Steel up to 55HRC.

Details and Dimensions for H060480N20 (mm)

UNC Coarse	TPI	Shank Diameter	Head Diameter
1/4"x20	20	6	5

Length	Flute Length	Flutes
60	12	4

Recommended Speeds and Feeds - Or use software or online calculator for general thread milling and match the tool type.

In the case of persistent tool breakage increase the number of passes or try mini or single tooth cutters.

Entry feed can be ignored for aluminium non-ferrous metals and plastics.

Using more passes will increase machining time but will create smaller chips so recutting chips may be less problematic.

Mild to Alloy Steel <HB180	Mild to Alloy Steel HB180-280	Mild Steel, Alloy Steel HB280-350	Stainless
SS400, SC10C Etc.	S45C, SCM440 Etc.	SNCM439 Etc.	SUS304, SUS316
G6.3 12K Balanced Tools RPM = 4200-4800	G6.3 12K Balanced Tools RPM = 4000-4600	G6.3 12K Balanced Tools RPM = 3500	G6.3 12K Balanced Tools RPM = 3500
G2.5 20K Balanced Tools RPM = 10000	G2.5 20K Balanced Tools RPM = 10000	G2.5 20K Balanced Tools RPM = 10000	G2.5 20K Balanced Tools RPM = 9000
Tool Entry Feed = 39mm/min	Tool Entry Feed = 39mm/min	Tool Entry Feed = 30mm/min	Tool Entry Feed = 39mm/min
Cutting Feed = 130mm/min	Cutting Feed = 130mm/min	Cutting Feed = 100mm/min	Cutting Feed = 130mm/min
Cut in 4-5 passes	Cut in 4-5 passes	Cut in 4-5 passes	Cut in 4-5 passes
Application Choice Good	Application Choice Good	Application Choice Good	OK or use Titanium Series

Grey Cast Iron	Ductile Iron	Aluminium Alloy Si<5%
FC300	FCD450	Plastic, Bronze, Cooper Alloys
G6.3 12K Balanced Tools RPM = 4200-4800	G6.3 12K Balanced Tools RPM = 5500	G6.3 12K Balanced Tools RPM = 5500-6500
G2.5 20K Balanced Tools RPM = 10000	G2.5 20K Balanced Tools RPM = 10000	G2.5 20K Balanced Tools RPM = 10000
Tool Entry Feed = 39mm/min	Tool Entry Feed = 45mm/min	Tool Entry Feed = 260-300mm/min
Cutting Feed = 130mm/min	Cutting Feed = 150mm/min	Cutting Feed = 260-300mm/min
Cut in 4-5 passes	Cut in 4-5 passes	Cut in 2-4 passes
Application Choice Good	Application Choice Good	OK or use DLC Coated