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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Filters
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Workpiece Material
Workpiece Material
- P Steel (375)
- P0Low-Carbon Steels, Long Chipping C < .25%; <125 HB; <530 N/mm^2 UTS(375)
- P1Low-Carbon Steels, Short Chipping C < .25%; <125 HB; <530 N/mm^2 UTS(375)
- P2Medium and High Carbon Steels C < .25%; <220 HB; <25 HRC; >530 N/mm^2 UTS(375)
- P3Alloy Steels & Tool Steels C > .25%; <330 HB; <35 HRC; 600-850 N/mm^2 UTS(375)
- P4Alloy Steels & Tool Steels C > .25%; 350-420 HB; 35-43 HRC; 850-1400 N/mm^2 UTS(375)
- P5Ferritic, Martensitic, and PH Stainless Steels <330 HB; <35 HRC; 600-900 N/mm^2 UTS(375)
- P6High Strength Ferritic, Martensitic, and PH Stainless Steels 350-450 HB; 35-43 HRC; 900-2400 N/mm^2 UTS(375)
- M Stainless Steel (477)
- M1Austenitic Stainless Steel 130-200 HB; <600 N/mm^2 UTS(477)
- M2High Strength Austenitic Stainless and Cast Stainless Steels 150-230 HB; <25 HRC; >600 N/mm^2 UTS(477)
- M3Duplex Stainless Steel 135-275 HB; <30 HRC; 500-1200 N/mm^2 UTS(477)
- K Cast Iron (349)
- K1Gray Cast Iron 120-290 HB; <32 HRC; 125-500 N/mm^2 UTS(349)
- K2Low and Medium Strength CGI and Ductile Irons 130-260 HB; <28 HRC; <600 N/mm^2 UTS(349)
- K3High Strength Ductile and Austempered Ductile Iron 180-350 HB; <43 HRC; >600 N/mm^2 UTS(349)
- S High-Temp Alloys (477)
- S1Iron-Based, Heat-Resistant Alloys 160-260 HB; 25-48 HRC; 500-1200 N/mm^2 UTS(477)
- S2Cobalt-Based, Heat-Resistant Alloys 250-450 HB; 25-48 HRC; 1000-1450 N/mm^2 UTS(477)
- S3Nickel-Based, Heat Resistant Alloys 160-450 HB; <48 HRC; 600-1700 N/mm^2 UTS(477)
- S4Titanium and Titanium Alloys 300-400 HB; 33-43 HRC; 900-1600 N/mm^2 UTS(477)
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- DE (63)
- GB (41)
- SG (36)
Applications
Applications
ID Thread Turning (280)
OD Thread Turning (263)
Type of Thread
Type of Thread
- 55 (124)
- 60 (154)
- ACME (90)
- API (38)
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- M (212)
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- RD DIN 405 (102)
- STUB ACME (114)
- TR DIN 103 (114)
- UN (170)
- UNJ (99)
Tool Cutting Edge Angle
Tool Cutting Edge Angle
- 90.0 (120)
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Connection Style
Connection Style
- Bolt-On Head (1)
- Boring Bar Shank (52)
- Toolholder (67)
Cutting Edges Per Insert
Cutting Edges Per Insert
- 3.0 (486)
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Over All Length [L]
Over All Length [L]
- 41.275 mm(1)
- 60.0 mm(1)
- 82.55 mm(2)
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- 250.0 mm(6)
- 254.0 mm(10)
- 300.0 mm(2)
- 304.8 mm(2)
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Availability
gsaApproval
gsaApproval
Corner Radius
Corner Radius
- 0.0 mm(27)
- 0.025 mm(28)
- 0.05 mm(114)
- 0.075 mm(93)
- 0.1 mm(108)
- 0.125 mm(38)
- 0.15 mm(64)
- 0.175 mm(61)
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- 0.225 mm(62)
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- 0.325 mm(74)
- 0.35 mm(75)
- 0.4 mm(37)
- 0.425 mm(55)
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- 0.5 mm(27)
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- 0.575 mm(12)
- 0.6 mm(48)
- 0.625 mm(13)
- 0.65 mm(8)
- 0.7 mm(17)
- 0.75 mm(29)
- 0.925 mm(14)
- 0.95 mm(20)
- 0.975 mm(1)
- 1.0 mm(15)
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Corner Chamfer
Corner Chamfer
- 0.0 mm(366)
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Application
Grade Of Cutting Tool
Grade Of Cutting Tool
- KC5010 (150)
- KC5025 (417)
- KC720 (36)
- KC730 (28)
- KCU20B (107)
Hand Of Tool
Hand Of Tool
- L (48)
- R (72)
Wiper Insert
Wiper Insert
- N (486)
F Dimension
F Dimension
- 7.112 mm(4)
- 7.3 mm(4)
- 8.89 mm(3)
- 8.9 mm(2)
- 10.3 mm(1)
- 11.3 mm(2)
- 11.5 mm(2)
- 11.684 mm(4)
- 11.7 mm(1)
- 12.0 mm(1)
- 12.7 mm(2)
- 12.954 mm(4)
- 13.4 mm(3)
- 15.6 mm(2)
- 15.8 mm(1)
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- 25.8 mm(2)
- 31.75 mm(8)
- 32.0 mm(13)
- 38.1 mm(2)
- 38.887 mm(1)
- 40.0 mm(3)
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Minimum Bore Diameter
Minimum Bore Diameter
- 12.7 mm(4)
- 13.0 mm(4)
- 16.0 mm(2)
- 16.51 mm(3)
- 17.0 mm(1)
- 20.0 mm(5)
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- 32.0 mm(3)
- 36.83 mm(1)
- 38.1 mm(1)
- 39.0 mm(2)
- 47.0 mm(2)
- 76.962 mm(1)
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Minimum Axial Groove Diameter
Minimum Axial Groove Diameter
- 12.7 mm(4)
- 13.0 mm(4)
- 16.0 mm(2)
- 16.51 mm(3)
- 17.0 mm(1)
- 20.0 mm(5)
- 20.32 mm(4)
- 22.86 mm(4)
- 24.0 mm(3)
- 27.0 mm(2)
- 29.0 mm(5)
- 30.48 mm(3)
- 31.75 mm(3)
- 32.0 mm(3)
- 36.83 mm(1)
- 38.1 mm(1)
- 39.0 mm(2)
- 47.0 mm(2)
- 76.962 mm(1)
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Countersunk Angle
Countersunk Angle
- 10.0 (3)
- 14.5 (24)
- 15.0 (12)
- 27.5 (53)
- 30.0 (274)
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Cutting Direction
Cutting Direction
- E (67)
- S (53)
Rake Angle Style
Rake Angle Style
- DOUBLE NEGATIVE (99)
- NEGATIVE-ZERO (21)
Maximum Bore Depth
Maximum Bore Depth
- 25.0 mm(2)
- 25.4 mm(2)
- 31.75 mm(2)
- 32.0 mm(3)
- 35.94 mm(1)
- 38.1 mm(2)
- 39.878 mm(1)
- 40.0 mm(3)
- 57.15 mm(2)
- 60.0 mm(2)
- 63.5 mm(4)
- 64.0 mm(2)
- 76.2 mm(2)
- 80.0 mm(4)
- 95.25 mm(2)
- 96.0 mm(1)
- 100.0 mm(4)
- 114.3 mm(2)
- 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 (41)
Front-End
Clamp Style
Clamp Style
- C (58)
- M (24)
- S (17)
- Y (21)
Cutting Width
Cutting Width
- 1.32 mm(1)
- 1.69 mm(1)
- 2.04 mm(1)
- 2.42 mm(1)
- 2.43 mm(1)
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Insert Shape
Insert Shape
- LT-TRIANGLE LAY DOWN THREAD 60 (486)
Thread TPI
Thread TPI
- 4.0 (10)
- 5.0 (8)
- 6.0 (8)
- 7.0 (9)
- 8.0 (28)
- 9.0 (1)
- 10.0 (19)
- 11.0 (10)
- 11.5 (7)
- 12.0 (28)
- 14.0 (45)
- 16.0 (32)
- 18.0 (17)
- 19.0 (5)
- 20.0 (18)
- 24.0 (10)
- 25.0 (9)
- 27.0 (1)
- 28.0 (10)
- 31.0 (1)
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- 33.0 (4)
- 36.0 (1)
- 40.0 (2)
- 48.0 (29)
- 50.0 (4)
- 63.0 (1)
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Thread Pitch
Thread Pitch
- 0.4 mm(1)
- 0.5 mm(7)
- 0.52 mm(1)
- 0.63 mm(1)
- 0.7 mm(2)
- 0.75 mm(7)
- 0.79 mm(5)
- 0.8 mm(1)
- 0.9 mm(7)
- 1.0 mm(16)
- 1.2 mm(1)
- 1.25 mm(14)
- 1.3 mm(1)
- 1.5 mm(44)
- 1.75 mm(31)
- 1.8 mm(9)
- 2.0 mm(22)
- 2.3 mm(3)
- 2.5 mm(8)
- 2.75 mm(1)
- 3.0 mm(48)
- 3.5 mm(4)
- 4.0 mm(6)
- 4.5 mm(2)
- 5.0 mm(10)
- 6.0 mm(3)
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Insert Geometry
Shape
Shape
- LT-TRIANGLE LAY DOWN THREAD 60 (435)
Insert IC Size
Insert IC Size
- 4.0 mm(1)
- 5.0 mm(7)
- 6.35 mm(113)
- 9.525 mm(269)
- 12.7 mm(41)
- 15.875 mm(4)
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Insert Seat Size
Insert Seat Size
- 11 (2)
- 16 (3)
- 6 (1)
- 8 (7)
Cutting Edge Length
Cutting Edge Length
- 6.928 mm(1)
- 8.66 mm(7)
- 8.7 mm(1)
- 9.5 mm(60)
- 9.51 mm(2)
- 9.53 mm(6)
- 11.0 mm(1)
- 16.498 mm(3)
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Cutting Tool Material
Cutting Tool Material
- H W (486)
Back-End
Connection Type
Connection Type
- BORING BAR (52)
- BORING BAR HEAD (1)
- SQUARE SHANK (67)
Back-End Diameter
Back-End Diameter
- 9.525 mm(2)
- 10.0 mm(2)
- 12.7 mm(1)
- 15.875 mm(2)
- 16.0 mm(3)
- 19.05 mm(10)
- 20.0 mm(12)
- 25.0 mm(5)
- 25.4 mm(2)
- 31.75 mm(6)
- 32.0 mm(5)
- 40.0 mm(2)
- 63.5 mm(1)
to
Shank Height
Shank Height
- 12.0 mm(2)
- 12.7 mm(2)
- 14.82 mm(2)
- 15.41 mm(1)
- 15.875 mm(2)
- 15.88 mm(1)
- 16.0 mm(4)
- 18.82 mm(11)
- 19.05 mm(7)
- 19.41 mm(1)
- 20.0 mm(7)
- 23.82 mm(4)
- 24.41 mm(1)
- 25.0 mm(15)
- 25.4 mm(13)
- 30.82 mm(5)
- 31.75 mm(5)
- 32.0 mm(9)
- 38.82 mm(2)
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Shank Width
Shank Width
- 12.0 mm(2)
- 12.7 mm(2)
- 15.875 mm(2)
- 15.88 mm(1)
- 16.0 mm(4)
- 19.05 mm(7)
- 20.0 mm(8)
- 21.96 mm(4)
- 25.0 mm(14)
- 25.4 mm(13)
- 28.96 mm(5)
- 31.75 mm(5)
- 32.0 mm(9)
- 36.96 mm(2)
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