16NR 3.00 ISO T250 Internal Threading Insert Premium Grade

16NR 3.00 ISO T250 Internal Threading Insert Premium Grade
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Our Price:  £3.60
List Price:  £5.40
Saving Of:  £1.80 (33%)
(Exc. 20% VAT)(£4.32 Inc. VAT)

Model:  16NR3.00ISOT250
Brand:  APT Threading

Shipped Weight:  7g

Availability:  

In stock, immediate despatch  

In stock, immediate despatch

APT Threading

Threading Inserts Fully Ground with High Quality PVD Coatings, Quality Machine Taps and Thread Milling Cutters


16NR 3.00 ISO T250, 3.0mm pitch full form ISO metric internal threading Insert in grade T250.

Grade T250 is micro-grain carbide and is our preimium grade for all types of steel including carbon, alloy and hardened steel also good for cast iron and stainless good choice for general use.

Micrograin carbide provides increased wear resistance and improved tool life.

This bronze colour PVD coated grade covers P25, M25, K30, S15, H10 range of materials.

General Cutting parameters
MaterialHardness HBCutting Speed VC: m/minNumber of PassesApplication Choice
Non alloyed steel 0-0.45℅ C125-17090-190 (140)9-16Good
Low alloyed steel180-35070-140 (100)9-16Good
High alloyed steel200-32550-120 (90)9-16Good
Corrosion resistant steel20060-130 (100)9-16Good
Stainless - Ferritic200-33060-130 (100)9-16OK but try grade T350
Stainless - Austenitic180-20040-140 (90)9-16OK but try grade T350
Stainless - Cast Ferritic200-33060-120 (90)9-16OK but try grade T350
Stainless - Cast Austenitic200-33060-110 (80)9-16OK but try grade T350
Grey cast iron180-26060-130 (100)9-16OK
Spheroidal cast iron160-26090-160 (120)9-16OK
Malleable / Tempered iron130-23060-100 (70)9-16OK
Aluminium Wrought Alloys60-10080-370 (220)9-16OK but try grade AK10
Aluminium Castings Si<12%80-90200-360 (280)9-16OK but try grade AK10
Aluminium Alloys Si 12%-23%13060-180 (120)9-16OK but try grade AK10
Bronze & Brass90-10080-250 (170)9-16OK but try grade AK10
Iron Based Hi-temp Alloys 200-280 HB200-28030-60 (45)9-16OK but try grade T350
Nickel or Cobalt Based 250 HB25020-30 (25)9-16OK but try grade T350
Nickel or Cobalt Based 30-58 HRC35015-25 (20)9-16OK but try grade T350
Pure Titanium400Rm140-170 (150)9-16OK but try grade T350
Titanium  Alpha + Beta Alloys1050Rm50-70 (60)9-16OK but try grade T350
Hardened Steel40-50HRC45-60 (50)9-16OK
Hardened Steel50-55HRC40-50 (45)9-16OK

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