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Nook Industries provides a complete selection of inch and metric Ball Screws, Roller Screws, Acme Screws, Lead Screws, End Bearing Supports, Precision Locknuts, Worm Gear Screw Jacks, Electric Actuators, HRC 60 Linear Shafting, Linear Bearings and Pillow Blocks to the Linear Motion Industry.
 

INCH ACME
SCREW ASSEMBLIES

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Inch Acme Screw Assemblies

Metric Lead Screw Assemblies

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 INCH ACME SCREW ASSEMBLIES
qUICK REFERENCE		 Acme Inch Screw Assemblies
  • Repeatable positioning accuracy of 0.0003 in/in (up to 2.5" dia.) - 0.0006 in/in (3" dia. and up)
  • Standard diameters from 1/4" to 6" (larger diameters up to 14")
  • Standard leads from 0.050" to 1"
  • Alloy and Stainless Steel Screws
  • Bronze and Plastic Nuts
  • Flanges and EZZE-MOUNT™ end bearing supports are available for a complete lead screw assembly

Compare Acme Screws: sort inch acme screws by a category or view a side-by-side screw comparison. To view a specific screw click on that screw link.
ACME Screw Size Bronze Nut Plastic Nut
DIA-TPI
(in.)		 LEAD
(in.)		 ROOT
(in.)		 HELIX MATERIAL STATIC
LOAD
(lbs.)		 DYN.
LOAD
(lbs.)		 TORQUE
TO
RAISE
1 lb.
(in.-lb.)		 EFF. % STATIC
LOAD
(lbs.)		 DYN.
LOAD
(lbs.)		 TORQUE
TO
RAISE
1 lb.
(in.-lb.)		 EFF. % PDF
PAGE
1/4 - 3 .333 .192 RH Alloy/SS 1000 312 .073 73 156 156 .067 79 20
1/4 - 4 .250 .162 RH SS 1000 312 .056 71 156 156 .053 75 20
1/4 - 16 .062 .162 RH/LH Alloy/SS 1000 312 .026 39 156 156 .021 46 20
1/4 - 20 .050 .175 RH SS 1000 312 .002 36 156 156 .020 40 20
5/16 - 2 .500 .216 RH SS - - - - 205 205 .099 81 21
5/16 - 4 .250 .216 RH Alloy/SS 1625 510 .059 67 205 205 .054 73 21
3/8 - 1 1.00 .238 RH SS - - - - 351 351 .199 80 22
3/8 - 2 .500 .278 RH Alloy/SS 2250 703 .107 74 351 351 .101 79 22
3/8 - 4 .250 .278 RH Alloy/SS 2250 703 .063 63 351 351 .057 69 22
3/8 - 5 .200 .282 RH Alloy/SS 2250 703 .054 59 351 351 .050 64 22
3/8 - 6 .166 .263 RH/LH Alloy/SS 2250 703 .049 54 351 351 .044 60 23
3/8 - 8 .125 .278 RH Alloy/SS 2250 703 .042 48 351 351 .037 54 23
3/8 - 10 .100 .282 RH Alloy/SS 2250 703 .038 42 351 351 .033 48 23
3/8 - 12 .083 .263 RH/LH Alloy/SS 2250 703 .036 37 351 351 .031 43 23
3/8 - 16 .062 .286 RH Alloy/SS 2250 703 .031 32 351 351 .028 35 23
7/16 - 2 .500 .340 RH Alloy/SS - - - - 450 450 .103 77 24
7/16 - 4 .250 .340 RH Alloy/SS 3000 975 .067 60 450 450 .060 66 24
1/2 - 1 1.00 .392 RH SS - - - - 625 625 .106 75 25
1/2 - 2 .500 .406 RH Alloy/SS 4000 1250 .115 69 625 625 .107 75 25
1/2 - 4 .250 .332 RH Alloy/SS 4000 1250 .070 57 625 625 .064 63 25
1/2 - 5 .200 .391 RH Alloy/SS 4000 1250 .061 52 625 625 .056 57 25
1/2 - 10 .100 .359 RH/LH Alloy/SS 4000 1250 .047 34 625 625 .039 40 25
5/8 - 2 2/3 .375 .457 RH/LH Alloy 6250 1953 .100 60 976 976 .091 66 26
5/8 - 5 .200 .377 RH/LH Alloy 6250 1953 .072 44 976 976 .060 53 26
5/8 - 5(2) .200 .484 RH Alloy/SS 6250 1953 .069 46 976 976 .062 51 26
5/8 - 8 .125 .457 RH/LH Alloy/SS 6250 1953 .058 34 976 976 .049 40 26
5/8 - 10 .100 .516 RH Alloy/SS 6250 1953 .053 30 976 976 .046 35 26
3/4 - 2 .500 .581 RH Alloy 9000 2812 .129 62 1406 1406 .118 68 27
3/4 - 3 .333 .537 RH/LH Alloy 9000 2812 .099 54 1406 1406 .089 60 27
3/4 - 5 .200 .502 RH/LH Alloy/SS 9000 2812 .080 40 1406 1406 .066 48 27
3/4 - 6 .166 .537 RH/LH Alloy/SS 9000 2812 .073 36 1406 1406 .061 43 27
3/4 - 10 .100 .608 RH/LH Alloy/SS 9000 2812 .064 25 1406 1406 .052 30 27
7/8 - 6 .166 .661 RH/LH Alloy 12250 3828 .083 32 1914 1914 .068 39 28
1 - 1 1.00 .906 RH/LH Alloy 16000 5000 .231 69 2500 2500 .216 74 29
1 - 2 .500 .698 RH/LH Alloy 16000 5000 .139 57 2500 2500 .127 63 29
1 - 4 .250 .698 RH/LH Alloy/SS 16000 5000 .105 38 2500 2500 .086 46 29
1 - 5 .200 .750 RH/LH Alloy/SS 16000 5000 .094 34 2500 2500 .079 40 29
1 - 6 .167 .786 RH/LH Alloy/SS 16000 5000 .089 30 2500 2500 .074 36 29
1 - 10 .100 .857 RH/LH Alloy/SS 16000 5000 .078 20 2500 2500 .065 24 29
1 1/8 - 5 .200 .875 RH/LH Alloy 20500 6330 .100 32 3165 3165 .085 37 30
1 1/4 - 4 .250 .947 RH/LH Alloy/SS 25000 7812 .117 34 3906 3906 .099 40 31
1 1/4 - 5 .200 .999 RH/LH Alloy/SS 25000 7812 .114 28 3906 3906 .092 35 31
1 1/2 - 2 .500 1.196 RH/LH Alloy 36000 11250 .173 46 5625 5625 .152 52 32
1 1/2 - 2 2/3 .375 1.066 RH/LH Alloy/SS 36000 11250 .149 40 5625 5625 .129 46 32
1 1/2 - 4 .250 1.196 RH/LH Alloy/SS 36000 11250 .133 30 5625 5625 .111 36 32
1 1/2 - 5 .200 1.249 RH/LH Alloy/SS 36000 11250 .127 25 5625 5625 .105 30 32
1 1/2 - 10 .100 1.355 RH/LH Alloy 36000 11250 .110 15 5625 5625 .091 17 32
1 3/4 - 4 .250 1.427 RH/LH Alloy 49900 15312 .153 26 7656 7656 .124 32 33
2 - 2 .500 1.410 RH/LH Alloy 64000 20000 .199 40 10000 10000 .174 46 34
2 - 4 .250 1.694 RH/LH Alloy 64000 20000 .166 24 10000 10000 .137 29 34
2 - 5 .200 1.747 RH/LH Alloy 64000 20000 .159 20 10000 10000 .130 24 34
2 1/4 - 2 .500 1.684 RH/LH Alloy 81000 25312 .215 37 12656 12656 .188 42 35