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Ball Screws and Nuts
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 |  |
A | Ball Nuts, Externally Threaded Nut, Style B |
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.
Externally Threaded Ball Nuts—Right-Hand Threaded
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A | Style B |
Black-Oxide Alloy Steel—Black-oxide alloy steel ball nuts have mild corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
Wipers—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 Screw Nuts | Wipers | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Style | Thread Size | Lg. | Wd. | Ht. | Dia. | No. of Thread Starts | Travel Distance per Turn | External Thread Size | Hardness | Dynamic Thrust Load Cap., lb. | Max. Backlash | Temp. Range, ° F | Each | Each | ||||
Black-Oxide Alloy Steel | ||||||||||||||||||
| A | 3/4"-5 | 2 7/8" | — | — | 1 1/4" | 1 | 0.2" | 1 1/8"-18 | Rockwell C56 | 1,900 | 0.015" | -65 to 300 | 3405N459 | 000000 | 2528N34 | 000000 | ||
| B | 1"-4 | 2 11/32" | 1 1/2" | 1 1/2" | — | 1 | 0.25" | 1 9/16"-18 | Rockwell C56 | 1,625 | 0.015" | -65 to 300 | 3405N463 | 000000 | ——— | 0 | ||
Externally Threaded Ball Nuts—Left-Hand Threaded
|
A |
Black-Oxide Alloy Steel—Black-oxide alloy steel ball nuts have mild corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
Style | Thread Size | Lg. | Wd. | Ht. | No. of Thread Starts | Travel Distance per Turn | External Thread Size | Hardness | Dynamic Thrust Load Cap., lb. | Max. Backlash | Temp. Range, ° F | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Black-Oxide Alloy Steel | |||||||||||||||
| A | 1"-4 | 2 11/32" | 1 1/2" | 1 1/2" | 1 | 0.25" | 1 9/16"-18 | Rockwell C56 | 1,620 | 0.015" | -65 to 300 | 3405N457 | 0000000 | ||
Fast-Travel Ball Screws and Nuts
 |  |  |
Ball Nuts, Externally Threaded Nut, Style C | Ball Nuts, Externally Threaded Nut, Style D |
Externally Threaded Ball Nuts—Right-Hand Threaded
| |
Style C | Style D |
Black-Oxide Alloy Steel—Black-oxide alloy steel ball nuts have mild corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
Style | Thread Size | Lg. | Wd. | Ht. | Dia. | No. of Thread Starts | Travel Distance per Turn | External Thread Size | Hardness | Dynamic Thrust Load Cap., lb. | Max. Backlash | Temp. Range, ° F | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Black-Oxide Alloy Steel | ||||||||||||||||
| C | 1"-4 | 3 1/8" | — | — | 1 11/16" | 2 | 0.5" | 1 9/16"-18 | Rockwell C56 | 4,250 | 0.015" | -65 to 300 | 3405N466 | 0000000 | ||
| D | 1"-4 | 3" | 1 1/2" | 1 1/2" | — | 4 | 1" | 1 9/16"-18 | Rockwell C56 | 2,300 | 0.015" | -65 to 300 | 3405N468 | 000000 | ||
