Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. Also known as single-start ball screws and nuts, they have a single thread that runs the length of the screw. They operate with more torque than fast-travel ball screws and nuts. To ensure compatibility, select components that have the same thread direction and size. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.

Black-oxide alloy steel ball nuts have mild corrosion resistance.

Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.

3D CAD models availableFor technical drawings and 3-D models, click on a part number.

Ball Screws—Right-Hand Threaded

Root diameter indicates the diameter the ball screw will be after machining away the threads.

Thread

Size Lg.,

ft. No. of

Thread Starts Travel Distance

per Turn Accuracy for Travel

Distance per Turn Root

Dia. Hardness Tensile

Strength, psi Temperature

Range, °F Each

Alloy Steel

3/8"-8 1 1 0.125" ±0.004" per ft. 0.31" Rockwell C56 85,000 -40° to 300° 3405N001 $50.33

3/8"-8 2 1 0.125" ±0.004" per ft. 0.31" Rockwell C56 85,000 -40° to 300° 3405N002 100.66

1/2"-5 1 1 0.2" ±0.004" per ft. 0.405" Rockwell C56 85,000 -40° to 300° 3405N003 58.02

1/2"-5 2 1 0.2" ±0.004" per ft. 0.405" Rockwell C56 85,000 -40° to 300° 3405N004 116.04

1/2"-5 3 1 0.2" ±0.004" per ft. 0.405" Rockwell C56 85,000 -40° to 300° 3405N005 174.06

5/8"-5 1 1 0.2" ±0.004" per ft. 0.503" Rockwell C56 85,000 -40° to 300° 3405N006 29.23

5/8"-5 2 1 0.2" ±0.004" per ft. 0.503" Rockwell C56 85,000 -40° to 300° 3405N007 58.46

5/8"-5 3 1 0.2" ±0.004" per ft. 0.503" Rockwell C56 85,000 -40° to 300° 3405N008 87.69

5/8"-5 4 1 0.2" ±0.004" per ft. 0.503" Rockwell C56 85,000 -40° to 300° 3405N009 116.92

5/8"-5 5 1 0.2" ±0.004" per ft. 0.503" Rockwell C56 85,000 -40° to 300° 3405N011 146.15

5/8"-5 6 1 0.2" ±0.004" per ft. 0.503" Rockwell C56 85,000 -40° to 300° 3405N012 175.38

3/4"-5 1 1 0.2" ±0.004" per ft. 0.655" Rockwell C56 85,000 -40° to 300° 3405N013 65.71

3/4"-5 2 1 0.2" ±0.004" per ft. 0.655" Rockwell C56 85,000 -40° to 300° 3405N014 131.42

3/4"-5 3 1 0.2" ±0.004" per ft. 0.655" Rockwell C56 85,000 -40° to 300° 3405N015 197.13

3/4"-5 4 1 0.2" ±0.004" per ft. 0.655" Rockwell C56 85,000 -40° to 300° 3405N016 262.84

3/4"-5 5 1 0.2" ±0.004" per ft. 0.655" Rockwell C56 85,000 -40° to 300° 3405N017 328.55

3/4"-5 6 1 0.2" ±0.004" per ft. 0.655" Rockwell C56 85,000 -40° to 300° 3405N018 394.26

1"-4 2 1 0.25" ±0.004" per ft. 0.836" Rockwell C56 85,000 -40° to 300° 3405N022 157.96

1"-4 3 1 0.25" ±0.004" per ft. 0.836" Rockwell C56 85,000 -40° to 300° 3405N023 236.94

1"-4 4 1 0.25" ±0.004" per ft. 0.836" Rockwell C56 85,000 -40° to 300° 3405N024 315.92

1"-4 5 1 0.25" ±0.004" per ft. 0.836" Rockwell C56 85,000 -40° to 300° 3405N025 394.90

1"-4 6 1 0.25" ±0.004" per ft. 0.836" Rockwell C56 85,000 -40° to 300° 3405N026 473.88

1"-4 7 1 0.25" ±0.004" per ft. 0.836" Rockwell C56 85,000 -40° to 300° 3405N027 552.86

1"-4 8 1 0.25" ±0.004" per ft. 0.836" Rockwell C56 85,000 -40° to 300° 3405N028 631.84

1 1/2"-2 2 1 0.5" ±0.004" per ft. 1.265" Rockwell C56 85,000 -40° to 300° 3405N029 225.88

1 1/2"-2 3 1 0.5" ±0.004" per ft. 1.265" Rockwell C56 85,000 -40° to 300° 3405N031 338.82

1 1/2"-2 4 1 0.5" ±0.004" per ft. 1.265" Rockwell C56 85,000 -40° to 300° 3405N032 451.76

1 1/2"-2 5 1 0.5" ±0.004" per ft. 1.265" Rockwell C56 85,000 -40° to 300° 3405N033 564.70

1 1/2"-2 6 1 0.5" ±0.004" per ft. 1.265" Rockwell C56 85,000 -40° to 300° 3405N034 677.64

1 1/2"-2 7 1 0.5" ±0.004" per ft. 1.265" Rockwell C56 85,000 -40° to 300° 3405N035 790.58

1 1/2"-2 8 1 0.5" ±0.004" per ft. 1.265" Rockwell C56 85,000 -40° to 300° 3405N036 903.52

1 1/2"-4 2 1 0.25" ±0.004" per ft. 1.379" Rockwell C56 85,000 -40° to 300° 3405N037 237.50

1 1/2"-4 3 1 0.25" ±0.004" per ft. 1.379" Rockwell C56 85,000 -40° to 300° 3405N038 356.25

1 1/2"-4 4 1 0.25" ±0.004" per ft. 1.379" Rockwell C56 85,000 -40° to 300° 3405N039 475.00

1 1/2"-4 5 1 0.25" ±0.004" per ft. 1.379" Rockwell C56 85,000 -40° to 300° 3405N041 593.75

1 1/2"-4 6 1 0.25" ±0.004" per ft. 1.379" Rockwell C56 85,000 -40° to 300° 3405N042 712.50

1 1/2"-4 7 1 0.25" ±0.004" per ft. 1.379" Rockwell C56 85,000 -40° to 300° 3405N043 831.25

1 1/2"-4 8 1 0.25" ±0.004" per ft. 1.379" Rockwell C56 85,000 -40° to 300° 3405N044 950.00

2 1/4"-2 2 1 0.5" ±0.004" per ft. 1.868" Rockwell C56 85,000 -40° to 300° 3405N045 382.60

2 1/4"-2 3 1 0.5" ±0.004" per ft. 1.868" Rockwell C56 85,000 -40° to 300° 3405N046 573.90

2 1/4"-2 4 1 0.5" ±0.004" per ft. 1.868" Rockwell C56 85,000 -40° to 300° 3405N047 765.20

2 1/4"-2 5 1 0.5" ±0.004" per ft. 1.868" Rockwell C56 85,000 -40° to 300° 3405N048 956.50

2 1/4"-2 6 1 0.5" ±0.004" per ft. 1.868" Rockwell C56 85,000 -40° to 300° 3405N049 1,147.80

2 1/4"-2 7 1 0.5" ±0.004" per ft. 1.868" Rockwell C56 85,000 -40° to 300° 3405N051 1,339.10

2 1/4"-2 8 1 0.5" ±0.004" per ft. 1.868" Rockwell C56 85,000 -40° to 300° 3405N052 1,530.40

Ball Screws—Left-Hand Threaded

Root diameter indicates the diameter the ball screw will be after machining away the threads.

Thread

Size Lg.,

ft. No. of

Thread Starts Travel Distance

per Turn Accuracy for Travel

Distance per Turn Root

Dia. Hardness Tensile

Strength, psi Temperature

Range, °F Each

Alloy Steel

5/8"-5 1 1 0.2" ±0.004" per ft. 0.503" Rockwell C56 85,000 -40° to 300° 3405N053 $29.23

5/8"-5 2 1 0.2" ±0.004" per ft. 0.503" Rockwell C56 85,000 -40° to 300° 3405N054 58.46

5/8"-5 3 1 0.2" ±0.004" per ft. 0.503" Rockwell C56 85,000 -40° to 300° 3405N055 87.69

5/8"-5 6 1 0.2" ±0.004" per ft. 0.503" Rockwell C56 85,000 -40° to 300° 3405N056 175.38

1"-4 1 1 0.25" ±0.004" per ft. 0.836" Rockwell C56 85,000 -40° to 300° 3405N057 86.47

1"-4 2 1 0.25" ±0.004" per ft. 0.836" Rockwell C56 85,000 -40° to 300° 3405N058 172.94

1"-4 3 1 0.25" ±0.004" per ft. 0.836" Rockwell C56 85,000 -40° to 300° 3405N059 259.41

1"-4 6 1 0.25" ±0.004" per ft. 0.836" Rockwell C56 85,000 -40° to 300° 3405N061 518.82

Ball Screws with One Machined End—Right-Hand Threaded

Ball screws with one machined end fit into an end support and are ready to connect to a motor. To adjust the length, the non-machined end can be cut to size.

Root diameter indicates the diameter the ball screw will be after machining away the threads.

Machined End

Keyway

Thread

Size Root

Dia. Lg.,

ft. No. of

Thread Starts Travel Distance

per Turn Accuracy for Travel

Distance per Turn Shoulder

Lg. Overall

Lg. Thread

Size Dia. Lg. Wd. Hardness Tensile

Strength, psi Temperature

Range, °F Each

Alloy Steel

5/8"-5 0.5" 2 1 0.2" ±0.004" per ft. 1 63/64" 3 19/64" 0.469"-32 13/32" 1 1/4" 1/8" Rockwell C56 85,000 -40° to 300° 3405N063 $480.69

5/8"-5 0.5" 4 1 0.2" ±0.004" per ft. 1 63/64" 3 19/64" 0.469"-32 13/32" 1 1/4" 1/8" Rockwell C56 85,000 -40° to 300° 3405N064 538.74

5/8"-5 0.5" 6 1 0.2" ±0.004" per ft. 1 63/64" 3 19/64" 0.469"-32 13/32" 1 1/4" 1/8" Rockwell C56 85,000 -40° to 300° 3405N065 573.04

3/4"-5 0.655" 2 1 0.2" ±0.004" per ft. 2 3/16" 3 3/16" 0.586"-32 1/2" 7/8" 1/8" Rockwell C56 85,000 -40° to 300° 3405N066 281.83

3/4"-5 0.655" 4 1 0.2" ±0.004" per ft. 2 3/16" 3 3/16" 0.586"-32 1/2" 7/8" 1/8" Rockwell C56 85,000 -40° to 300° 3405N067 373.50

3/4"-5 0.66" 6 1 0.2" ±0.004" per ft. 2 3/16" 3 3/16" 0.586"-32 1/2" 7/8" 1/8" Rockwell C56 85,000 -40° to 300° 3405N13 465.22

1"-4 0.84" 2 1 0.25" ±0.004" per ft. 2 23/32" 4 1/32" 0.781"-32 5/8" 1 1/4" 3/16" Rockwell C56 85,000 -40° to 300° 3405N068 559.50

1"-4 0.84" 4 1 0.25" ±0.004" per ft. 2 23/32" 4 1/32" 0.781"-32 5/8" 1 1/4" 3/16" Rockwell C56 85,000 -40° to 300° 3405N069 606.71

1"-4 0.84" 6 1 0.25" ±0.004" per ft. 2 23/32" 4 1/32" 0.781"-32 5/8" 1 1/4" 3/16" Rockwell C56 85,000 -40° to 300° 3405N071 654.29

Externally-Threaded Ball Nuts—Right-Hand Threaded

A

B

Secure a way wiper on the end of a ball nut to sweep chips and other contaminants out of the way as it moves across the ball screw.

Ball Nuts

Way Wipers

  Thread

Size Lg. Wd. Ht. Dia. No. of

Thread Starts Travel Distance

per Turn External

Thread Size Hardness Dynamic Thrust

Load Cap., lbs. Max.

Backlash Temperature

Range, °F Each Each

Black-Oxide Alloy Steel

A 3/8"-8 1 11/64" __ __ 3/4" 1 0.125" 11/16"-28 Rockwell C56 150 0.015" -40° to 300° 3405N072 $72.06 ______ __

A 1/2"-5 2 3/4" __ __ 1 1/16" 1 0.2" 15/16"-16 Rockwell C56 1,200 0.015" -40° to 300° 3405N073 333.38 2528N31 $78.09

A 3/4"-5 2 57/64" __ __ 1 5/16" 1 0.2" 1.173"-18 Rockwell C56 1,900 0.015" -40° to 300° 3405N074 210.04 2528N34 71.13

A 1 1/2"-2 5 19/32" __ __ 2 5/8" 1 0.5" 2.360"-18 Rockwell C56 14,500 0.015" -40° to 300° 3405N076 527.12 ______ __

A 1 1/2"-4 3 1/4" __ __ 2 3/32" 1 0.25" 1 31/32"-18 Rockwell C56 4,000 0.015" -40° to 300° 3405N077 625.28 ______ __

A 2 1/4"-2 6 11/16" __ __ 3 3/8" 1 0.5" 3.137"-12 Rockwell C56 19,250 0.015" -40° to 300° 3405N078 1,078.12 ______ __

B 5/8"-5 1 23/32" 1" 1" __ 1 0.2" 15/16"-16 Rockwell C56 770 0.015" -40° to 300° 3405N079 84.22 ______ __

B 1"-4 2 11/32" 1 1/2" 1 1/2" __ 1 0.25" 1 9/16"-18 Rockwell C56 1,600 0.015" -40° to 300° 3405N081 134.88 ______ __

Externally-Threaded Ball Nuts—Left-Hand Threaded

A

B

Secure a way wiper on the end of a ball nut to sweep chips and other contaminants out of the way as it moves across the ball screw.

Ball Nuts

Way Wipers

  Thread

Size Lg. Wd. Ht. No. of

Thread Starts Travel Distance

per Turn External

Thread Size Hardness Dynamic Thrust

Load Cap., lbs. Max.

Backlash Temperature

Range, °F Each Each

Black-Oxide Alloy Steel

A 1"-4 2 11/32" __ __ 1 0.25" 1.563"-18 Rockwell C56 1,600 0.015" -40° to 300° 3405N083 $292.90 2528N37 $76.44

B 5/8"-5 1 45/64" 1" 1" 1 0.2" 15/16"-16 Rockwell C56 770 0.015" -40° to 300° 3405N082 82.18 2528N32 78.09

Flange Ball Nuts—Right-Hand Threaded

C

D

Flange

  Thread

Size Lg. Wd. Ht. Dia. Dia. Thick. No. of

Thread Starts Travel Distance

per Turn Bolt Circle

Dia. Hardness Dynamic Thrust

Load Cap., lbs. Max.

Backlash Temperature

Range, °F Each

Black-Oxide Alloy Steel

C 3/8"-8 1" __ __ 3/4" 1 39/64" 11/32" 1 0.125" 1 15/64" Rockwell C56 130 0.015" -40° to 300° 3405N084 $417.02

C 1/2"-5 2 57/64" __ __ 1 1/16" 2 19/32" 17/32" 1 0.2" 2 3/32" Rockwell C56 1,200 0.015" -40° to 300° 3405N085 436.32

C 3/4"-5 2 57/64" __ __ 1 5/16" 2 39/64" 17/32" 1 0.2" 2 3/32" Rockwell C56 1,900 0.015" -40° to 300° 3405N086 239.07

C 1 1/2"-2 5 19/32" __ __ 2 5/8" 4 21/32" 25/32" 1 0.5" 3 7/8" Rockwell C56 14,500 0.015" -40° to 300° 3405N088 598.85

C 1 1/2"-4 3 9/32" __ __ 2 3/32" 4 3/8" 13/16" 1 0.25" 3 1/2" Rockwell C56 4,000 0.015" -40° to 300° 3405N089 297.28

C 2 1/4"-2 6 23/32" __ __ 3 3/8" 5 3/8" 1 37/64" 1 0.5" 4 3/8" Rockwell C56 19,250 0.015" -40° to 300° 3405N091 1,046.72

D 5/8"-5 1 23/32" 1" 1" __ 2 39/64" 17/32" 1 0.2" 2 3/32" Rockwell C56 770 0.015" -40° to 300° 3405N092 289.00

D 1"-4 2 11/32" 1 1/2" 1 1/2" __ 3 1/4" 5/8" 1 0.25" 2 3/4" Rockwell C56 1,600 0.015" -40° to 300° 3405N093 364.08

Flange Ball Nuts—Left-Hand Threaded

D

Flange

  Thread

Size Lg. Wd. Ht. Dia. Dia. Thick. No. of

Thread Starts Travel Distance

per Turn Bolt Circle

Dia. Hardness Dynamic Thrust

Load Cap., lbs. Max.

Backlash Temperature

Range, °F Each

Black-Oxide Alloy Steel

D 5/8"-5 1 45/64" 1" 1" __ 2 19/32" 17/32" 1 0.2" 2 3/32" Rockwell C56 770 0.015" -40° to 300° 3405N094 $121.42

D 1"-4 2 11/32" 1 1/2" 1 1/2" 1" 3 1/4" 5/8" 1 0.25" 2 3/4" Rockwell C56 1,600 0.015" -40° to 300° 3405N095 648.93