LT Threading
Ensure accurate and high-quality threads with Laydown Triangle (LT) threading tooling. The system is designed with a low profile for fine-pitch internal threading applications. The LT threading systems include boring bars, boring heads, toolholders, and inserts. With a wide selection of chip control inserts, you will receive superior chip management for excellent surface finishes and minimal operator intervention. The low-profile design enables unrestricted chip flow — ideal for Internal Diameter (I.D.) threads. The LT threading toolholders include an insert screw and a top clamp for easy switch outs. This comprehensive system is designed to minimize built-up edge, reduce cutting forces and precisely cut most materials.
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Workpiece Material
Workpiece Material
- P Steel (899)
- P0Low-Carbon Steels, Long Chipping C < .25%; <125 HB; <530 N/mm^2 UTS(899)
- P1Low-Carbon Steels, Short Chipping C < .25%; <125 HB; <530 N/mm^2 UTS(899)
- P2Medium and High Carbon Steels C < .25%; <220 HB; <25 HRC; >530 N/mm^2 UTS(899)
- P3Alloy Steels & Tool Steels C > .25%; <330 HB; <35 HRC; 600-850 N/mm^2 UTS(899)
- P4Alloy Steels & Tool Steels C > .25%; 350-420 HB; 35-43 HRC; 850-1400 N/mm^2 UTS(899)
- P5Ferritic, Martensitic, and PH Stainless Steels <330 HB; <35 HRC; 600-900 N/mm^2 UTS(899)
- P6High Strength Ferritic, Martensitic, and PH Stainless Steels 350-450 HB; 35-43 HRC; 900-2400 N/mm^2 UTS(899)
- M Stainless Steel (992)
- M1Austenitic Stainless Steel 130-200 HB; <600 N/mm^2 UTS(992)
- M2High Strength Austenitic Stainless and Cast Stainless Steels 150-230 HB; <25 HRC; >600 N/mm^2 UTS(992)
- M3Duplex Stainless Steel 135-275 HB; <30 HRC; 500-1200 N/mm^2 UTS(992)
- K Cast Iron (889)
- K1Gray Cast Iron 120-290 HB; <32 HRC; 125-500 N/mm^2 UTS(889)
- K2Low and Medium Strength CGI and Ductile Irons 130-260 HB; <28 HRC; <600 N/mm^2 UTS(889)
- K3High Strength Ductile and Austempered Ductile Iron 180-350 HB; <43 HRC; >600 N/mm^2 UTS(889)
- N Non-Ferrous Materials (629)
- N1Wrought Aluminum (629)
- N2Low-Silicon Aluminum Alloys and Magnesium Alloys Si <12.2%(629)
- N3High-Silicon Aluminum Alloys Si >12.2%(629)
- N4Copper, Brass, Zinc-based on machinability index range of 70-100 (629)
- N5Nylon, Plastics, Rubbers, Phenolics, Resins, Fiberglass (629)
- N6Carbon, Graphite Composites, CFRP (629)
- N7MMC's (629)
- S High-Temp Alloys (992)
- S1Iron-Based, Heat-Resistant Alloys 160-260 HB; 25-48 HRC; 500-1200 N/mm^2 UTS(992)
- S2Cobalt-Based, Heat-Resistant Alloys 250-450 HB; 25-48 HRC; 1000-1450 N/mm^2 UTS(992)
- S3Nickel-Based, Heat Resistant Alloys 160-450 HB; <48 HRC; 600-1700 N/mm^2 UTS(992)
- S4Titanium and Titanium Alloys 300-400 HB; 33-43 HRC; 900-1600 N/mm^2 UTS(992)
- H Hardened Materials (629)
- H1Hardened Materials 44-48 HRC(629)
- H2Hardened Materials 48-55 HRC(629)
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- DE (63)
- GB (41)
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Applications
Applications
ID Thread Turning (511)
OD Thread Turning (454)
Type of Thread
Type of Thread
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- TR DIN 103 (166)
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Tool Cutting Edge Angle
Tool Cutting Edge Angle
- 90.0 (160)
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Connection Style
Connection Style
- Bolt-On Head (1)
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- Toolholder (83)
Cutting Edges Per Insert
Cutting Edges Per Insert
- 3.0 (993)
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Over All Length [L]
Over All Length [L]
- 41.275 mm(1)
- 60.0 mm(1)
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GSA Approved Product
GSA Approved Product
Corner Radius
Corner Radius
- 0.0 mm(65)
- 0.025 mm(54)
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Corner Chamfer
Corner Chamfer
- 0.0 mm(847)
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Application
Grade Of Cutting Tool
Grade Of Cutting Tool
- KC5010 (153)
- KC5025 (443)
- KC720 (38)
- KC730 (30)
- KCU20B (629)
Hand Of Tool
Hand Of Tool
- L (62)
- R (98)
Wiper Insert
Wiper Insert
- N (993)
F Dimension
F Dimension
- 4.36 mm(3)
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Minimum Bore Diameter
Minimum Bore Diameter
- 6.25 mm(4)
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- 7.87 mm(4)
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Minimum Axial Groove Diameter
Minimum Axial Groove Diameter
- 6.25 mm(4)
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- 7.8 mm(4)
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Countersunk Angle
Countersunk Angle
- 10.0 (7)
- 14.5 (66)
- 15.0 (30)
- 27.5 (134)
- 30.0 (610)
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Cutting Direction
Cutting Direction
- E (83)
- S (77)
Rake Angle Style
Rake Angle Style
- DOUBLE NEGATIVE (139)
- NEGATIVE-ZERO (21)
Maximum Bore Depth
Maximum Bore Depth
- 12.1 mm(1)
- 12.6 mm(2)
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- 120.0 mm(1)
- 127.0 mm(2)
- 128.0 mm(3)
- 150.0 mm(1)
- 152.4 mm(2)
- 160.0 mm(2)
- 254.0 mm(1)
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Boring Bar Material
Boring Bar Material
- C (12)
- S (57)
- S/C (8)
Front-End
Clamp Style
Clamp Style
- C (58)
- M (24)
- S (57)
- Y (21)
Cutting Width
Cutting Width
- 0.046 mm(2)
- 0.092 mm(2)
- 0.459 mm(1)
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- 2.04 mm(4)
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Thread TPI
Thread TPI
- 4.0 (38)
- 4.5 (4)
- 4.6 (2)
- 5.0 (33)
- 5.5 (2)
- 5.6 (2)
- 6.0 (24)
- 6.3 (8)
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- 8.0 (58)
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- 44.0 (1)
- 48.0 (60)
- 50.0 (14)
- 63.0 (2)
- 100.0 (1)
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Thread Pitch
Thread Pitch
- 0.25 mm(1)
- 0.4 mm(2)
- 0.5 mm(18)
- 0.52 mm(2)
- 0.6 mm(5)
- 0.63 mm(2)
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- 5.0 mm(40)
- 5.5 mm(2)
- 5.6 mm(2)
- 6.0 mm(33)
- 6.3 mm(7)
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Insert Geometry
Shape
Shape
- LT-TRIANGLE LAY DOWN THREAD 60 (847)
Insert IC Size
Insert IC Size
- 4.0 mm(18)
- 5.0 mm(31)
- 6.35 mm(117)
- 9.525 mm(548)
- 12.7 mm(101)
- 15.875 mm(32)
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Insert Seat Size
Insert Seat Size
- 11 (114)
- 16 (517)
- 22 (99)
- 27 (32)
- 6 (18)
- 8 (31)
Cutting Edge Length
Cutting Edge Length
- 0.75 mm(1)
- 0.938 mm(2)
- 6.0 mm(16)
- 6.928 mm(2)
- 7.5 mm(29)
- 8.66 mm(2)
- 8.7 mm(1)
- 9.5 mm(98)
- 9.51 mm(4)
- 9.53 mm(11)
- 12.6 mm(2)
- 14.3 mm(496)
- 16.3 mm(2)
- 16.5 mm(4)
- 19.1 mm(99)
- 23.8 mm(22)
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Cutting Tool Material
Cutting Tool Material
- H W (993)
Back-End
Connection Type
Connection Type
- BORING BAR (76)
- BORING BAR HEAD (1)
- SQUARE SHANK (83)
Back-End Diameter
Back-End Diameter
- 6.0 mm(2)
- 6.35 mm(2)
- 7.9375 mm(2)
- 8.0 mm(2)
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- 50.0 mm(1)
- 50.8 mm(1)
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- 63.5 mm(2)
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Shank Height
Shank Height
- 12.0 mm(6)
- 12.7 mm(6)
- 14.82 mm(2)
- 15.41 mm(1)
- 15.875 mm(5)
- 15.88 mm(1)
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- 38.1 mm(1)
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- 40.0 mm(1)
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Shank Width
Shank Width
- 12.0 mm(6)
- 12.7 mm(6)
- 15.875 mm(5)
- 15.88 mm(1)
- 16.0 mm(4)
- 19.05 mm(7)
- 20.0 mm(8)
- 21.96 mm(4)
- 25.0 mm(14)
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- 28.96 mm(5)
- 31.75 mm(6)
- 32.0 mm(10)
- 36.96 mm(2)
- 38.1 mm(1)
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