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Left Hand Threading Tools

boring bar left hand threading

Designed for CNC and lathe applications.

Left Hand Threading Tools

Designed for CNC and lathe applications.

Our left-hand threading tools are engineered for high precision and exceptional performance in demanding applications.

Designed with a 60° thread form, these tools are perfect for cutting UN, ISO, and NPT threads with ease and accuracy.

Available in uncoated and coated versions, the AlTiN+ coating significantly extends tool life, providing enhanced durability and resistance to wear, even under high-speed machining conditions.

Featuring a precision ground shank flat, these tools ensure proper tool orientation, reducing setup time and improving consistency.

left hand threading boring bar


A (Minimum Bore) B (Max Depth) O (Minimum Offset) Recommended Threads Per Inch Q S (Shank Diameter) OAL Tool # Uncoated EDP # AlTiN+ EDP #
0.040 0.080 0.013 56 to 80 0.009 0.125 1.50 LHTT040080 SCI.231501 SCI.231603
0.040 0.100 0.013 56 to 80 0.009 0.125 1.50 LHTT040100 SCI.231504 SCI.231606
0.040 0.130 0.013 56 to 80 0.009 0.125 1.50 LHTT040130 SCI.231507 SCI.231609
0.050 0.100 0.017 48 to 80 0.012 0.125 1.50 LHTT050100 SCI.231510 SCI.231612
0.050 0.150 0.017 48 to 80 0.012 0.125 1.50 LHTT050150 SCI.231513 SCI.231615
0.050 0.200 0.017 48 to 80 0.012 0.125 1.50 LHTT050200 SCI.231516 SCI.231618
0.060 0.150 0.020 40 to 80 0.014 0.125 1.50 LHTT060150 SCI.231519 SCI.231621
0.060 0.200 0.020 40 to 80 0.014 0.125 1.50 LHTT060200 SCI.231522 SCI.231624
0.060 0.250 0.020 40 to 80 0.014 0.125 1.50 LHTT060250 SCI.231525 SCI.231627
0.060 0.300 0.020 40 to 80 0.014 0.125 1.50 LHTT060300 SCI.231528 SCI.231630
0.075 0.200 0.020 36 to 72 0.014 0.125 1.50 LHTT075200 SCI.231531 SCI.231633
0.075 0.300 0.020 36 to 72 0.014 0.125 1.50 LHTT075300 SCI.231534 SCI.231636
0.075 0.400 0.020 36 to 72 0.014 0.125 1.50 LHTT075400 SCI.231537 SCI.231639
0.090 0.200 0.025 32 to 64 0.017 0.125 1.50 LHTT090200 SCI.231540 SCI.231642
0.090 0.300 0.025 32 to 64 0.017 0.125 1.50 LHTT090300 SCI.231543 SCI.231645
0.090 0.400 0.025 32 to 64 0.017 0.125 1.50 LHTT090400 SCI.231546 SCI.231648
0.090 0.500 0.025 32 to 64 0.017 0.125 1.50 LHTT090500 SCI.231549 SCI.231651
0.120 0.250 0.030 24 to 56 0.021 0.188 2.00 LHTT120250 SCI.231654 SCI.231696
0.120 0.400 0.030 24 to 56 0.021 0.188 2.00 LHTT120400 SCI.231657 SCI.231699
0.120 0.600 0.030 24 to 56 0.021 0.188 2.00 LHTT120600 SCI.231660 SCI.231702
0.120 0.750 0.030 24 to 56 0.021 0.188 2.00 LHTT120750 SCI.231663 SCI.231705
0.150 0.350 0.035 20 to 56 0.023 0.188 2.00 LHTT150350 SCI.231666 SCI.231708
0.150 0.500 0.035 20 to 56 0.023 0.188 2.00 LHTT150500 SCI.231669 SCI.231711
0.150 0.750 0.035 20 to 56 0.023 0.188 2.00 LHTT150750 SCI.231672 SCI.231714
0.180 0.350 0.040 18 to 56 0.027 0.250 2.50 LHTT180350 SCI.231720 SCI.231768
0.180 0.500 0.040 18 to 56 0.027 0.250 2.50 LHTT180500 SCI.231723 SCI.231771
0.180 0.750 0.040 18 to 56 0.027 0.250 2.50 LHTT180750 SCI.231726 SCI.231774
0.180 1.000 0.040 18 to 56 0.027 0.250 2.50 LHTT1801000 SCI.231717 SCI.231765
0.200 0.400 0.045 16 to 40 0.029 0.250 2.50 LHTT200400 SCI.231732 SCI.231780
0.200 0.600 0.045 16 to 40 0.029 0.250 2.50 LHTT200600 SCI.231735 SCI.231783
0.200 0.800 0.045 16 to 40 0.029 0.250 2.50 LHTT200800 SCI.231738 SCI.231786
0.200 1.000 0.045 16 to 40 0.029 0.250 2.50 LHTT2001000 SCI.231729 SCI.231777
0.230 0.400 0.055 14 to 40 0.038 0.313 2.50 LHTT230400 SCI.231795 SCI.231855
0.230 0.600 0.055 14 to 40 0.038 0.313 2.50 LHTT230600 SCI.231798 SCI.231858
0.230 0.750 0.055 14 to 40 0.038 0.313 2.50 LHTT230750 SCI.231801 SCI.231861
0.230 1.000 0.055 14 to 40 0.038 0.313 2.50 LHTT2301000 SCI.231789 SCI.231849
0.230 1.250 0.055 14 to 40 0.038 0.313 2.50 LHTT2301250 SCI.231792 SCI.231852
0.290 0.500 0.070 12 to 40 0.047 0.313 2.50 LHTT290500 SCI.231813 SCI.231873
0.290 0.750 0.070 12 to 40 0.047 0.313 2.50 LHTT290750 SCI.231816 SCI.231876
0.290 1.000 0.070 12 to 40 0.047 0.313 2.50 LHTT2901000 SCI.231804 SCI.231864
0.290 1.250 0.070 12 to 40 0.047 0.313 2.50 LHTT2901250 SCI.231807 SCI.231867
0.290 1.500 0.070 12 to 40 0.047 0.313 3.00 LHTT2901500 SCI.231810 SCI.231870
0.320 0.500 0.075 10 to 32 0.049 0.375 2.50 LHTT320500 SCI.231888 231942
0.320 0.750 0.075 10 to 32 0.049 0.375 2.50 LHTT320750 SCI.231891 231945
0.320 1.000 0.075 10 to 32 0.049 0.375 2.50 LHTT3201000 SCI.231879 231933
0.320 1.250 0.075 10 to 32 0.049 0.375 2.50 LHTT3201250 SCI.231882 231936
0.320 1.500 0.075 10 to 32 0.049 0.375 3.00 LHTT3201500 SCI.231885 231939
0.360 0.500 0.080 8 to 32 0.057 0.375 2.50 LHTT360500 231900 231954
0.360 0.750 0.080 8 to 32 0.057 0.375 2.50 LHTT360750 231903 231957
0.360 1.000 0.080 8 to 32 0.057 0.375 2.50 LHTTL3601000 SCI.231894 231948
0.360 1.250 0.080 8 to 32 0.057 0.375 2.50 LHTT3601250 SCI.231897 231951
0.360 1.500 0.080 8 to 32 0.057 0.375 3.00 LHTT3601500 SCI.231899 231953
0.360 1.800 0.080 8 to 32 0.057 0.375 3.00 LHTT3601800 231960 231966
0.490 0.750 0.120 8 to 32 0.077 0.500 3.00 LHTT490750 231975 231993
0.490 1.500 0.120 8 to 32 0.077 0.500 3.00 LHTT4901500 231969 231987
0.490 2.000 0.120 8 to 32 0.077 0.500 3.50 LHTT4902000 231972 231990

 

 

 

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Trademarks are the properties of their respective owner(s).

November 2025

The descriptions, illustrations, specifications, dimensions, and part numbers are subject to change without notice.


Servicing the Canadian provinces and territories of
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