Quick Select Guide

Lead Screw and Ball Screw Quick Select Guide

A
Major
Diameter
(in.)
B
Lead
(in./rev.)
C
Effective
Threads
per Inch*
D
Threads
per Inch
E
Starts
F
Minor
Diameter
(in.)
G
Screw
Weight
(lbs./ft.)
H
Static
Load Rating
(Bronze Nut)
(lbs.)
I
Operating
Load Rating
(Bronze Nut)
(lbs.)
J
Static
Load Rating
(Plastic Nut)
(lbs.)
K
Operating
Load Rating
(Plastic Nut)
(lbs.)
L
Product
Line
$
Prices & Products
RH (Right Hand)
LH (Left Hand)
3/16"
.050
20
20
1
.110
.070
500
75
125
38
Acme
RH, LH
1/4"
.050
20
20
1
.175
.130
1,000
300
250
150
Acme
RH, LH
1/4"
.063
16
16
1
.161
.110
1,000
300
250
150
Acme
RH, LH
1/4"
.100
10
20
2
.175
.120
950
300
240
150
Hi-Lead
RH, LH
1/4"
.250
4
16
4
.189
.130
950
300
240
150
Hi-Lead
1/4"
.333
3
12
4
.190
.130
NA
NA
380
150
Torqspline
RH, LH
3/8"
.050
20
20
1
.298
.310
2,250
700
560
350
Acme
3/8"
.063
16
16
1
.285
.299
2,250
700
560
350
Acme
RH, LH
3/8"
.083
12
12
1
.263
.289
2,250
700
560
350
Acme
RH, LH
3/8"
.100
10
10
1
.235
.270
2,250
700
560
350
Acme
RH, LH
3/8"
.125
8
8
1
.265
.280
1,200
400
300
200
Acme
RH, LH
3/8"
.167
6
12
2
.263
.289
2,250
700
560
350
Hi-Lead
RH, LH
3/8"
.200
5
10
2
.245
.270
2,250
700
560
350
Hi-Lead
3/8"
.250
4
8
2
.265
.289
1,200
400
300
200
Hi-Lead
RH, LH
3/8"
.375
2 2/3
10 2/3
4
.260
.280
1,200
400
750
200
Hi-Lead
3/8"
A
Major
Diameter
(in.)
.500
B
Lead
(in./rev.)
2
C
Effective
Threads
per Inch*
8
D
Threads
per Inch
4
E
Starts
.265
F
Minor
Diameter
(in.)
.289
G
Screw
Weight
(lbs./ft.)
NA
H
Static
Load Rating
(Bronze Nut)
(lbs.)
NA
I
Operating
Load Rating
(Bronze Nut)
(lbs.)
750
J
Static
Load Rating
(Plastic Nut)
(lbs.)
250
K
Operating
Load Rating
(Plastic Nut)
(lbs.)
Torqspline
L
Product
Line
$
Prices & Products
RH (Right Hand)
LH (Left Hand)
3/8"
1.000
1
5
5
.250
.270
NA
NA
750
250
Torqspline
7/16"
1.000
1
8
8
.327
.400
NA
NA
1,200
260
Torqspline
1/2"
.333
3
6
2
.295
.429
3,500
1,100
875
550
Hi-Lead
1/2"
.100
10
10
1
.359
.520
4,000
1,250
1,000
625
Acme
RH, LH
1/2"
.125
8
8
1
.332
.489
4,000
1,250
1,000
625
Acme
RH, LH
1/2"
.200
5
10
2
.359
.520
4,000
1,250
1,000
625
Hi-Lead
RH, LH
1/2"
.250
4
8
2
.332
.489
4,000
1,250
1,000
625
Hi-Lead
RH, LH
1/2"
.333
3
6
2
.295
.429
3,500
1,100
875
550
Hi-Lead
1/2"
.500
2
8
4
.345
.479
4,000
1,250
1,000
625
Hi-Lead
RH, LH
5/8"
.100
10
10
1
.483
.849
6,250
1,900
1,560
950
Acme
RH, LH
5/8"
.125
8
8
1
.457
.820
6,250
1,900
1,560
950
Acme
RH, LH
5/8"
.143
7
7
1
.332
.820
6,250
1,900
1,560
950
Acme
RH, LH
5/8"
.200
5
10
2
.483
.839
6,250
1,900
1,560
950
Hi-Lead
RH, LH
5/8"
.250
4
8
2
.457
.820
6,250
1,900
1,560
950
Hi-Lead
RH, LH
11/16"
A
Major
Diameter
(in.)
.500
B
Lead
(in./rev.)
2
C
Effective
Threads
per Inch*
6
D
Threads
per Inch
3
E
Starts
.498
F
Minor
Diameter
(in.)
1.220
G
Screw
Weight
(lbs./ft.)
7,000
H
Static
Load Rating
(Bronze Nut)
(lbs.)
2,200
I
Operating
Load Rating
(Bronze Nut)
(lbs.)
1,750
J
Static
Load Rating
(Plastic Nut)
(lbs.)
1,100
K
Operating
Load Rating
(Plastic Nut)
(lbs.)
Hi-Lead
L
Product
Line
$
Prices & Products
RH (Right Hand)
LH (Left Hand)
3/4"
.063
16
16
1
.658
1.340
9,000
2,800
2,250
1,400
Acme
RH, LH
3/4"
.100
10
10
1
.608
1.260
9,000
2,800
2,250
1,400
Acme
RH, LH
3/4"
.125
8
8
1
.581
1.220
9,000
2,800
2,250
1,400
Acme
RH, LH
3/4"
.143
7
7
1
.562
1.179
9,000
2,800
2,250
1,400
Acme
3/4"
.167
6
6
1
.537
1.150
9,000
2,800
2,250
1,400
Acme
RH, LH
3/4"
.200
5
5
1
.502
1.120
9,000
2,800
2,250
1,400
Acme
RH, LH
3/4"
.200
5
5
1
.590
1.120
5,300
1,650
1,325
825
Acme
RH, LH
3/4"
.250
4
8
2
.581
1.220
9,000
2,800
2,250
1,400
Hi-Lead
RH, LH
3/4"
.333
3
6
2
.537
1.150
9,000
2,800
2,250
1,400
Hi-Lead
RH, LH
.500
2
8
4
.580
1.220
9,000
2,800
2,250
1,400
Hi-Lead
3/4"
.500
2
8
4
.580
1.220
9,000
2,800
2,250
1,400
Hi-Lead
3/4"
1.000
1
6
6
.619
1.240
NA
NA
3,600
400
Torqspline
3/4"
1.500
1
4
6
.528
1.159
NA
NA
3,600
400
Torqspline
7/8"
.167
6
6
1
.661
1.630
12,250
3,800
3,060
1,900
Acme
RH, LH
7/8"
A
Major
Diameter
(in.)
.200
B
Lead
(in./rev.)
5
C
Effective
Threads
per Inch*
5
D
Threads
per Inch
1
E
Starts
.626
F
Minor
Diameter
(in.)
1.560
G
Screw
Weight
(lbs./ft.)
12,250
H
Static
Load Rating
(Bronze Nut)
(lbs.)
3,800
I
Operating
Load Rating
(Bronze Nut)
(lbs.)
3,060
J
Static
Load Rating
(Plastic Nut)
(lbs.)
1,900
K
Operating
Load Rating
(Plastic Nut)
(lbs.)
Acme
L
Product
Line
RH, LH
$
Prices & Products
RH (Right Hand)
LH (Left Hand)
1"
.100
10
10
1
.856
2.330
16,000
5,000
4,000
2,500
Acme
RH, LH
1"
.125
8
8
1
.830
2.280
16,000
5,000
4,000
2,500
Acme
RH, LH
1"
.143
7
7
1
.811
2.220
16,000
5,000
4,000
2,500
Acme
RH, LH
1"
.167
6
6
1
.786
2.180
16,000
5,000
4,000
2,500
Acme
RH, LH
1"
.200
5
5
1
.750
2.089
16,000
5,000
4,000
2,500
Acme
RH, LH
1"
.250
4
4
1
.698
2.000
16,000
5,000
4,000
2,500
Acme
RH, LH
1"
.250
4
8
2
.825
2.280
16,000
5,000
4,000
2,500
Hi-Lead
RH, LH
1"
.333
3
6
2
.786
2.180
16,000
5,000
4,000
2,500
Hi-Lead
RH, LH
1"
.400
2 1/2
5
2
.750
2.089
16,000
5,000
4,000
2,500
Hi-Lead
RH, LH
1"
.500
2
4
2
.690
2.000
16,000
5,000
4,000
2,500
Hi-Lead
RH, LH
1"
1.000
1
5
5
.750
2.089
16,000
5,000
4,000
2,500
Hi-Lead
RH, LH
1"
2.000
1/2
4
8
.750
2.069
NA
NA
6,000
625
Torqspline
1 1/8"
.200
5
5
1
.875
2.730
20,000
6,200
5,000
3,100
Acme
RH, LH
1 1/8"
.333
3
6
2
.910
2.810
20,000
6,400
5,000
3,200
Hi-Lead
1 3/16"
A
Major
Diameter
(in.)
1.200
B
Lead
(in./rev.)
5/6
C
Effective
Threads
per Inch*
5
D
Threads
per Inch
6
E
Starts
.925
F
Minor
Diameter
(in.)
3.010
G
Screw
Weight
(lbs./ft.)
20,000
H
Static
Load Rating
(Bronze Nut)
(lbs.)
1,800
I
Operating
Load Rating
(Bronze Nut)
(lbs.)
8,000
J
Static
Load Rating
(Plastic Nut)
(lbs.)
900
K
Operating
Load Rating
(Plastic Nut)
(lbs.)
Torqspline
L
Product
Line
$
Prices & Products
RH (Right Hand)
LH (Left Hand)
1 1/4"
.063
16
16
1
1.155
3.870
25,000
7,800
6,250
3,900
Acme
1 1/4"
.200
5
5
1
.999
3.439
25,000
7,800
6,250
3,900
Acme
RH, LH
1 1/4"
.250
4
4
1
.947
3.300
25,000
7,800
6,250
3,900
Acme
RH, LH
1 1/4"
.400
2 1/2
5
2
.999
3.439
25,000
7,800
6,250
3,900
Hi-Lead
RH, LH
1 3/8"
.250
4
4
1
1.071
4.030
30,000
9,300
7,500
4,650
Acme
RH, LH
1 7/16"
3.000
1/3
4
12
1.197
4.700
NA
NA
12,000
1,400
Torqspline
1 1/2"
.100
10
10
1
1.350
5.500
36,000
11,300
9,000
5,650
Acme
RH, LH
1 1/2"
.200
5
5
1
1.245
5.100
36,000
11,300
9,000
5,650
Acme
RH, LH
1 1/2"
.250
4
4
1
1.196
4.879
36,000
11,300
9,000
5,650
Acme
RH, LH
1 1/2"
.375
2 2/3
2 2/3
1
1.195
4.980
21,000
6,600
5,250
3,300
Acme
1 1/2"
.400
2 1/2
5
2
1.248
5.120
36,000
11,300
9,000
5,650
Hi-Lead
RH, LH
1 1/2"
.500
2
4
2
1.196
4.889
36,000
11,300
9,000
5,650
Hi-Lead
1 1/2"
.750
1 1/3
4
3
1.196
4.940
36,000
11,300
9,000
5,650
Hi-Lead
1 3/4"
.250
4
4
1
1.445
6.890
50,000
15,300
12,500
7,650
Acme
RH, LH
1 3/4"
A
Major
Diameter
(in.)
.333
B
Lead
(in./rev.)
3
C
Effective
Threads
per Inch*
3
D
Threads
per Inch
1
E
Starts
1.358
F
Minor
Diameter
(in.)
6.570
G
Screw
Weight
(lbs./ft.)
50,000
H
Static
Load Rating
(Bronze Nut)
(lbs.)
15,300
I
Operating
Load Rating
(Bronze Nut)
(lbs.)
12,500
J
Static
Load Rating
(Plastic Nut)
(lbs.)
7,650
K
Operating
Load Rating
(Plastic Nut)
(lbs.)
Acme
L
Product
Line
$
Prices & Products
RH (Right Hand)
LH (Left Hand)
1 7/8"
4.000
1/4
4
16
1.643
8.359
NA
NA
20,000
2,500
Torqspline
2"
.250
4
4
1
1.694
9.220
65,000
20,000
16,250
10,000
Acme
RH, LH
2"
.333
3
3
1
1.608
8.769
65,000
20,000
16,250
10,000
Acme
2"
.500
2
4
2
1.698
9.240
65,000
20,000
16,250
10,000
Hi-Lead
RH, LH
2"
.666
1 1/2
3
2
1.608
8.779
65,000
20,000
16,250
10,000
Hi-Lead
2"
.666
1 1/2
3
2
1.608
8.779
65,000
20,000
16,250
10,000
Hi-Lead
2"
1.000
1
4
4
1.640
8.740
65,000
19,000
16,250
9,600
Hi-Lead
RH, LH
2 1/4"
.250
4
4
1
1.944
11.760
80,000
25,000
20,000
12,500
Acme
RH, LH
2 1/2"
.250
4
4
1
2.193
14.830
100,000
31,000
25,000
15,500
Acme
RH, LH
2 1/2"
.333
3
3
1
2.106
14.230
100,000
31,000
25,000
15,500
Acme
2 1/2"
.500
2
2
1
1.930
13.250
100,000
31,000
25,000
15,500
Acme
RH, LH
2 3/4"
6.000
1/6
4
24
2.535
18.930
NA
NA
40,000
5,000
Torqspline
3"
.250
4
4
1
2.691
21.800
150,000
46,000
37,500
23,000
Acme
3"
.333
3
3
1
2.605
21.050
150,000
46,000
37,500
23,000
Acme
3"
A
Major
Diameter
(in.)
.500
B
Lead
(in./rev.)
3
C
Effective
Threads
per Inch*
3
D
Threads
per Inch
1
E
Starts
2.456
F
Minor
Diameter
(in.)
19.870
G
Screw
Weight
(lbs./ft.)
150,000
H
Static
Load Rating
(Bronze Nut)
(lbs.)
46,000
I
Operating
Load Rating
(Bronze Nut)
(lbs.)
37,500
J
Static
Load Rating
(Plastic Nut)
(lbs.)
23,000
K
Operating
Load Rating
(Plastic Nut)
(lbs.)
Acme
L
Product
Line
RH, LH
$
Prices & Products
RH (Right Hand)
LH (Left Hand)
3 1/2"
.500
2
2
1
2.930
27.710
200,000
63,000
50,000
31,000
Acme
*Effective threads per inch is the reciprocal of the lead. For screws with more than one start it is not the actual threads per inch.
Roton Products, Inc.  |  660 East Elliott, Kirkwood, MO 63122  |  Toll Free: 800-GO-ROTON (800-467-6866)
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