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AccuThread® 856 Bolt-In 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.
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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 bolt-in connection allows for small cutter diameters
Features
- Allied's proprietary AM210® coating
- Stainless steel holders
- Wide range of forms and pitches
- Imperial and metric shanks
- Online programming
Technical Information
Product Specifications
Product Type
Inserted Thread Mill
Thread Form
NPT, NPTF, BSPT, BSPP, UN, UNJ, ISO
Shank Options
Imperial, Metric
Coating
AM210®
Substrate Options
Carbide
Coolant
Noncoolant
Geometry Options
Positive Rake
Product Nomenclature
AccuThread® 856 Indexable Inserts
Insert Style
x
TP = Bolt-in
TP
Insert Length
x
075 = 3/4
100 = 1.00
150 = 1.50
100 = 1.00
150 = 1.50
075
Coating
x
K = AM210®
A = TiAIN
U = Uncoated
A = TiAIN
U = Uncoated
K
-
Thread Class
x
UN = UN
UNJ = UNJ
NPT = NPT
NPTF = NPTF
BSPP = BSPP
UNJ = UNJ
NPT = NPT
NPTF = NPTF
BSPP = BSPP
BSPT = BSPT
M = ISO
FA = Full ACME
AP = API Round
M = ISO
FA = Full ACME
AP = API Round
UN
Thread Pitch
x
20 = UN
1.0 = ISO
1.0 = ISO
32
Thread Style
x
I = Internal
E = External
E = External
I
AccuThread® 856 Indexable Insert Holders
Holder Style
x
THT = Tapered Head
THN = Straight Head
THN = Straight Head
THT
-
Length of Insert
x
0400 = 0.400
0400
-
Shank Designation
x
1F = 1 flute
2F = 2 flutes
3F = 3 flutes
5F = 5 flutes
2F = 2 flutes
3F = 3 flutes
5F = 5 flutes
6F = 6 flutes
7F = 7 flutes
8F = 8 flutes
7F = 7 flutes
8F = 8 flutes
1F
Length of Insert
x
075 = 3/4
100 = 1.00
150 = 1.50
100 = 1.00
150 = 1.50
075
Shank Designation
x
Blank = Inch
M = Metric
M = Metric
M
Recommended Cutting Data
Additional Resources and Guidelines
