AccuThread™ 856 Pin Style   
Thread mills drastically reduce the occurrences of scrap when compared to taps, which makes them desirable when manufacturing large and/or costly components. AccuThread™ 856 are a premium thread milling product backed by Allied’s experienced technical staff. AccuThread™ 856 replaceable thread mills provide quality threads when compared to other thread making processes and allow for easy replacement of cutting edges.
Advantages
  • Provides a 25-50% increase in tool life over the competition
  • Increased strength and rigidity when cutting forces are applied
  • Holders are engineered to dampen vibration
  • Reduces tooling inventory cost
  • No resharpening required
  • The pin-style connection improves repeatability when changing inserts
Features
  • Allied's proprietary AM210® coating
  • Stainless steel holders
  • Wide range of forms and pitches
  • Imperial and metric shanks
  • Offered in neutral and positive rake geometries
  • Online programming
Recommended Materials  
Materials
x
Steel
High Temp Alloy
Stainless Steel
Hardened Steel
Cast Iron
Aluminum
Icon Reference




Recommended Industries  
Industries
x
Medical
Renewable Energy/ Energy
Automotive
Aerospace
Firearms
Agriculture
Oil and Gas
Marine
General Production
Heavy Equipment
Hydraulics
Tool, Mold, and Die
Structural Steel Fabricator
Icon Reference



AccuThread Pin Style: rotate
AccuThread Pin Style: rotate
AccuThread Pin Style Angle
AccuThread Pin Style Side 1
AccuThread Pin Style Side 2
AccuThread Pin Style Explosion
AccuThread Pin Style Close
Technical Information

Product Specifications
Product Type
Inserted Thread Mill
Thread Form
NPT, NPTF, BSPT, BSPP, API, ACME, UN, UNJ, ISO
Shank Options
Flanged, Shell Mill
Coating
AM210®
Substrate Options
Carbide
Coolant
Coolant and Non-coolant
Geometry Options
Positive Rake, Neutral Rake

Product Nomenclature
AccuThread™ 856 Indexable Insert Holders
Holder Style
x
THP = Weldon Positive Rake
TNR = Weldon Neutral Rake
TSN = Shelll Mill Positive Rake
TSR = Shell Mill Neutral Rake
THP
-
Length of Insert
x
0400 = 0.400
0400
-
Shank Designation
x
1F = 1 flute
2F = 2 flutes
3F = 3 flutes
5F = 5 flutes
 
6F = 6 flutes
7F = 7 flutes
8F = 8 flutes
1F
Length of Insert
x
075 = 3/4
100 = 1.00
150 = 1.50
075
Shank Designation
x
Blank = Inch
M = Metric
M
AccuThread™ 856 Indexable Inserts
Insert Style
x
TN = Pin style
TN
Insert Length
x
075 = 3/4
100 = 1.00
150 = 1.50
 
075
Coating
x
K = AM210®
A = TiAIN
U = Uncoated
K
-
Thread Class
x
UN = UN
UNJ = UNJ
NPT = NPT
NPTF = NPTF
BSPP = BSPP

 
BSPT = BSTP
M = ISO
FA = Full ACME
AP = API Round
 
UN
Thread Pitch
x
20 = UN
1.0 = ISO
 
32
Thread Style
x
I = Internal
E = External
I
Threading
Solid Carbide and Indexable Thread Mills

Available Online Only

Recommended Cutting Data
AccuThread 856 Indexable Neutral Rake
AccuThread 856 Indexable Positive Rake

Additional Resources