A technical drawing of a UN long reach thread mill (TMLR) with dimensional callouts.

UN Long Reach Thread Mill (TMLR)

The UN Long Reach Thread Mill (TMLR) is engineered for precision threading in deep or hard-to-reach areas where standard tools can’t reach. Designed to cut accurate 2A/2B and 3A/3B Unified National threads, this solid carbide tool offers superior rigidity and stability, even in extended applications. Its long reach design ensures clean, consistent thread profiles in deep cavities or complex parts. An optional AlTiN+ coating enhances tool life, wear resistance, and performance at higher cutting speeds, making it an excellent choice for challenging materials and high-production environments.

Thread/PitchA (Tool Diameter)B (Length of Cut)C (Neck Diameter)Q (Length)S (Shank Diameter)OALFlutesUncoated Tool #Uncoated EDP #AlTiN+ EDP #
0-800.0420.1200.0240.0060.2502.503TMLR042-80110883110885
0-800.0420.1800.0240.0060.2502.503TMLR042-80EL110887110889
1-640.0520.1500.0300.0060.2502.503TMLR052-64110891110893
1-640.0520.2100.0300.0060.2502.503TMLR052-64EL110895110897
1-720.0520.1800.0330.0070.2502.503TMLR052-72110899110901
1-720.0520.2500.0330.0070.2502.503TMLR052-72EL110903110905
2-560.0650.1800.0390.0090.2502.503TMLR065-56110501110603
2-560.0650.2100.0390.0090.2502.503TMLR065-56EL110504110606
2-560.0650.2900.0390.0090.2502.503TMLR065-56XL110505110607
3-480.0730.2000.0440.0100.2502.503TMLR073-48110907110909
3-480.0730.2800.0440.0100.2502.503TMLR073-48EL110911110913
4-400.0820.2250.0460.0130.2502.503TMLR082-40110507110609
4-400.0820.3000.0460.0130.2502.503TMLR082-40EL110510110612
4-400.0820.4000.0460.0130.2502.503TMLR082-40XL110915110917
6-320.1000.2600.0560.0160.2502.503TMLR100-32110513110615
6-320.1000.4000.0560.0160.2502.503TMLR100-32EL110516110618
6-320.1000.5400.0560.0160.2502.503TMLR100-32XL110919110921
6-400.1000.2600.0650.0130.2502.503TMLR100-40110519110621
6-400.1000.4000.0650.0130.2502.503TMLR100-40EL110522110624
6-400.1000.5400.0650.0130.2502.503TMLR100-40XL110923110925
8-320.1260.3000.0800.0160.2502.503TMLR126-32110525110627
8-320.1260.5000.0800.0160.2502.503TMLR126-32EL110528110630
8-320.1260.7000.0850.0160.2502.503TMLR126-32XL110927110929
8-360.1260.3000.0850.0140.2502.503TMLR126-36110531110633
8-360.1260.5000.0850.0140.2502.503TMLR126-36EL110534110636
10-240.1390.4000.0800.0210.2502.503TMLR139-24110537110639
10-240.1390.6000.0800.0210.2502.503TMLR139-24EL110540110642
10-240.1390.7500.0800.0210.2502.503TMLR139-24XL110935110937
10-320.1390.4000.0930.0160.2502.503TMLR139-32110543110645
10-320.1390.6000.0930.0160.2502.503TMLR139-32EL110546110648
10-320.1390.7500.0930.0160.2502.503TMLR139-32XL110939110941
10-480.1390.4000.1060.0100.2502.503TMLR139-48110549110651
10-480.1390.6000.1060.0100.2502.503TMLR139-48EL110552110654
1/4-200.1860.5000.1120.0250.2502.503TMLR186-20110555110657
1/4-200.1860.7000.1120.0250.2502.503TMLR186-20EL110558110660
1/4-200.1860.9000.1120.0250.2502.503TMLR186-20XL110947110949
1/4-280.1860.5000.1300.0180.2502.503TMLR186-28110561110663
1/4-280.1860.7000.1300.0180.2502.503TMLR186-28EL110564110666
1/4-280.1860.9000.1300.0180.2502.503TMLR186-28XL110951110953
1/4-320.1860.5000.1400.0160.2502.503TMLR186-32110567110669
1/4-320.1860.7000.1400.0160.2502.503TMLR186-32EL110570110672
1/4-320.1860.9000.1400.0160.2502.503TMLR186-32XL110955110957
5/16-180.2340.6000.1560.0280.2502.503TMLR234-18110573110675
5/16-180.2340.8500.1560.0280.2502.503TMLR234-18EL110576110678
5/16-180.2341.1000.1560.0280.2502.503TMLR234-18XL110959110961
5/16-240.2340.6000.1760.0210.2502.503TMLR234-24110579110681
5/16-240.2340.8500.1760.0210.2502.503TMLR234-24EL110582110684
5/16-240.2341.1000.1760.0210.2502.503TMLR234-24XL110963110965
5/16-280.2340.6000.1800.0180.2502.503TMLR234-28110585110687
5/16-280.2340.8500.1800.0180.2502.503TMLR234-28EL110588110690
5/16-280.2341.1000.1800.0180.2502.503TMLR234-28XL110967110969
5/16-320.2340.6000.1880.0160.2502.503TMLR234-32110591110693
5/16-320.2340.8500.1880.0160.2502.503TMLR234-32EL110594110696
5/16-320.2341.1000.1880.0160.2502.503TMLR234-32XL110971110973
5/16-400.2340.6000.1940.0130.2502.503TMLR234-40110597110699
5/16-400.2340.8500.1940.0130.2502.503TMLR234-40EL110600110702
5/16-400.2341.1000.1940.0130.2502.503TMLR234-40XL110975110977
3/8-160.2850.7500.1910.0310.3753.503TMLR285-16110705110771
3/8-160.2851.0000.1910.0310.3753.503TMLR285-16EL110708110774
3/8-160.2851.4000.1910.0310.3753.503TMLR285-16XL110979110981
3/8-240.2850.7500.2220.0210.3753.503TMLR285-24110711110777
3/8-240.2851.0000.2220.0210.3753.503TMLR285-24EL110714110780
3/8-240.2851.4000.2220.0210.3753.503TMLR285-24XL110983110985
3/8-320.2850.7500.2350.0160.3753.503TMLR285-32110717110783
3/8-320.2851.0000.2350.0160.3753.503TMLR285-32EL110720110786
7/16-140.3400.8000.2350.0360.3753.503TMLR340-14110723110789
7/16-140.3401.2000.2350.0360.3753.503TMLR340-14EL110726110792
7/16-140.3401.7000.2350.0360.3753.503TMLR340-14XL110991110993
7/16-180.3400.8000.2580.0280.3753.503TMLR340-18110729110795
7/16-180.3401.2000.2580.0280.3753.503TMLR340-18EL110732110798
7/16-200.3400.8000.2650.0250.3753.503TMLR340-20110735110801
7/16-200.3401.2000.2650.0250.3753.503TMLR340-20EL110738110804
7/16-200.3401.7000.2650.0250.3753.503TMLR340-20XL110999111001
1/2-120.3700.8000.2450.0420.3753.503TMLR370-12110741110807
1/2-120.3701.2000.2450.0420.3753.503TMLR370-12EL110744110810
1/2-120.3701.8000.2450.0420.3753.503TMLR370-12XL111003111005
1/2-130.3700.8000.2550.0380.3753.503TMLR370-13110747110813
1/2-130.3701.2000.2550.0380.3753.503TMLR370-13EL110750110816
1/2-130.3701.8000.2550.0380.3753.503TMLR370-13XL111007111009
1/2-180.3700.8000.2870.0280.3753.503TMLR370-18110753110819
1/2-180.3701.2000.2870.0280.3753.503TMLR370-18EL110756110822
1/2-200.3700.8000.2950.0250.3753.503TMLR370-20110759110825
1/2-200.3701.2000.2950.0250.3753.503TMLR370-20EL110762110828
1/2-200.3701.8000.2950.0250.3753.503TMLR370-20XL111015111017
1/2-320.3700.8000.3150.0160.3753.503TMLR370-32110765110831
1/2-320.3701.2000.3150.0160.3753.503TMLR370-32EL110768110834
5/8-110.4701.2000.3350.0450.5004.004TMRL470-11110837110861
5/8-110.4701.7500.3350.0450.5004.004TMRL470-11EL110840110864
5/8-110.4702.3000.3350.0450.5004.004TMRL470-11XL111023111025
3/4-100.4951.2000.3450.0500.5004.004TMLR495-10110843110867
3/4-100.4951.7500.3450.0500.5004.004TMLR495-10EL110846110870
3/4-100.4952.4000.3450.0500.5004.004TMLR495-10XL111027111029
3/4-120.4951.2000.3700.0420.5004.004TMLR495-12110849110873
3/4-120.4951.7500.3700.0420.5004.004TMLR495-12EL110852110876
3/4-120.4952.4000.3700.0420.5004.004TMLR495-12XL111031111033
3/4-160.4951.2000.3950.0310.5004.004TMLR495-16110855110879
3/4-160.4951.7500.3950.0310.5004.004TMLR495-16EL110858110882
3/4-160.4952.4000.3950.0310.5004.004TMLR495-16XL111035111037