1.000 In. Diameter - 0.250 In. Lead

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1.000 In. Diameter - 0.250 In. Lead

1.000 In. Diameter - 0.250 In. Lead

This 1 inch diameter ball screw has a 0.250 inch lead. Corresponding ball nuts are available in standard capacity, high capacity, and ultra-high capacity. Standard capacity ball nuts are available with right-hand or left-hand threads. High capacity and ultra-high capacity ball nuts are available with right-hand threads.

Ball screw specifications RH LH
Ball screw part no. BS 100 R 025 A BS 100 L 025 A
Nominal ball circle diameter 1.000 in.
Lead 0.250 in.
Screw diameter 0.980 in.
Root diameter 0.840 in.
Screw weight 2.18 lb./ft.
Torque to raise 1 pound* 0.044 in.-lb.
Maximum screw length 12 ft.

* Torque to raise 1 pound = 0.177 x inches lead x pounds load

Standard Capacity Ball Nut Specifications (S)

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Right hand thread direction shown; left hand is available.

Ball nut specifications RH LH
Ball nut part no. (standard capacity) BN 100 R 025 S BN 100 L 025 S
Ball nut with flange part no. BF 100 R 025 S BF 100 L 025 S
Dynamic load capacity** 1,625 lb.
Static load capacity 13,000 lb.
Ball nut weight 0.83 lb.
Nominal ball dia. (avg. ball qty.) 5/32 in. (85)
Flange part no. FL-1563
Wiper kit part no. WK-40

** for 1,000,000 inches

High Capacity Ball Nut Specifications (H)

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Right hand thread direction only.

Ball nut specifications RH
Ball nut part no. high capacity) BN 100 R 025 H
Ball nut with flange part no. BF 100 L 025 H
Dynamic load capacity** 3,250 lb.
Static load capacity 26,000 lb.
Ball nut weight 1.12 lb.
Nominal ball dia. (avg. ball qty.) 5/32 in. (170)
Flange part no. FL-1563
Wiper kit part no. WK-40

** for 1,000,000 inches

Ultra High Capacity Ball Nut Specifications (U)

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Right hand thread direction only.

Ball nut specifications RH
Ball nut part no. high capacity) BN 100 R 025 U
Ball nut with flange part no. BF 100 L 025 U
Dynamic load capacity** 4,500 lb.
Static load capacity 39,000 lb.
Ball nut weight 1.92 lb.
Nominal ball dia. (avg. ball qty.) 5/32 in. (255)
Flange part no. FL-1563
Wiper kit part no. WK-40B

** for 1,000,000 inches

2D/3D Drawings

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Product Media

2D/3D DRAWINGS1.000" X .250" DATA SHEET SB BEARING BLOCKS AND SCREW ENDS DB BEARING BLOCKS AND SCREW ENDS FB BEARING BLOCKS AND SCREW ENDS STANDARD BALL NUT, FLANGE, WIPER KIT HIGH CAP BALL NUT, FLANGE, WIPER KIT ULTRA HIGH CAP BALL NUT, FLANGE, WIPER KIT EFFECT OF CHANGE IN PARAMETER
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  • Ball screws are made from alloy steel and case hardened to Rc56 (minimum).
  • A black oxide finish is applied to prevent corrosion during shipping and for a brief storage period.
  • The rust inhibiting properties of the screw lubricant offers additional corrosion resistance.
  • Ball nut housings are steel with case hardened threads. A black oxide coating provides additional protection.
  • Flanges are constructed of steel with a black oxide coating.

Sample Part Number:

Click on the part number to reveal additional information about the screw design and shaft codes.

Thread Form

B: Ball Screw

Component

A: Assembly
S: Screw - without ball nut or bearing mounts

Screw Diameter - Thread direction - TPI (English)

Dia/TPI Code
5/8 - .200* 063 R 020
3/4 - .200 075 R 020
3/4 - .500 075 R 050
1 - .250* 100 R 025
1 - .500 100 R 050
1 - 1.000 100 R 100
1 1/2 - .500 150 R 050
1 1/2 - 1.00 150 R 100
1 1/2 - 1.875 150 R 188
2 1/4 - .500 225 R 050
2 1/2 - .500 250 R 050
3 - .660 300 R 066
4 - 1.000 400 R 100

R – Right-hand – all thread diameters/leads are available with right hand threads
L – Left-hand *- Substitute an ”L” in the part number for left hand leads

 

Screw Material

A: Alloy Steel

First End of Screw

(Flange or threaded end of nut always faces second end)

Bearing Mount Options Machining Options (choose one that corresponds to the bearing block)
SB - Simple Single* 1N – Threaded shaft only
DB - Simple Double 2K –  Thd Shaft w Kwy, 2L – Thd Shaft no Kwy, 2N – Threaded shaft only
FB - Fixed Double 3K –  Thd Shaft w Kwy, 3L – Thd Shaft no Kwy, 3N – Threaded shaft only
XX - No Bearing 4K –  Shaft w Keyway, 4L – Shaft no Keyway, 4N – Support only, XX – No Machining

(When selecting ”XX – No Bearing”, choose from mounting options 1K through 4N  or XX, above)
* All Simple Single bearing mounts are designed for radial loads only

Second End of Screw

(Flange or threaded end of nut always faces away from second end)

Bearing Mount Options Machining Options (choose one that corresponds to the bearing block)
SB - Simple Single* 1N – Threaded shaft only
DB - Simple Double 2K –  Thd Shaft w Kwy, 2L – Thd Shaft no Kwy, 2N – Threaded shaft only
FB - Fixed Double 3K –  Thd Shaft w Kwy, 3L – Thd Shaft no Kwy, 3N – Threaded shaft only
XX - No Bearing 4K –  Shaft w Keyway, 4L – Shaft no Keyway, 4N – Support only, XX – No Machining

(When selecting ”XX – No Bearing”, choose from mounting options 1K through 4N  or XX, above)
* All Simple Single bearing mounts are designed for radial loads only

Ball Nut Properties

S - Standard Capacity
H - High Capacity
U - Ultra Capacity
X - No ball nut

Other Options

F - With Flange
B - With Flange and Wipers
W - Wipers
X - No Options

Screw Length 000.00"

Enter value in inches with decimal if needed
Note that available screw length varies among screw sizes.

SB Bearing Blocks

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Screw Number Bearing Mount No. A B C D E F G H I J K
BS100R025A SB-20 4.500 2.750 1.438 0.500 1.750 1.625 3.250 0.938 1.875 .469 (4x) .656 Thru
BS100L025A 1.000 C'Bore
BS100R050A 1.312 Deep
BS100R100A  

DB Bearing Blocks

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Screw Number Bearing Mount No. A B C D E F G H I J K L
BS100R025A DB-20 4.500 2.750 1.438 0.500 1.750 1.625 3.250 0.938 1.875 .469 (4x) .656 Thru N/A
BS100L025A 1.000 C'Bore
BS100R050A 1.312 Deep
BS100R100A  

FB Bearing Blocks

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Screw Number Bearing Mount No. A B C D E F G H I J K (dia) L (dia) L
BS100R025A FB-20 4.500 2.750 1.438 1.625 5.015 0.937 3.250 N/A 2.125 2.750 .437 Thru .688 Thru  
BS100L025A .687 C'Bore 1.000 C'Bore  
BS100R050A #8 Taper Pin 1.625 Deep  
BS100R100A      

SB Screw End Conditions

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Screw Number Bearing Mount No. oS1 A1 A2 A3 A4 A5 A6 o A7 A8 A9 A10 A11
BS100R025A SB-20 0.7877 1.070 0.570 0.63 0.190 0.590 1.305 1.75 .781-32 UNS W-04 N-04 6304
BS100L025A 0.7873 0.188
BS100R050A    
BS100R100A    

DB Screw End Conditions

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Screw Number Bearing Mount No. oS1 oS2 A1 A2 A3 A4 A5 A6 A7 A8 A9
BS100R025A DB-20 0.7877 0.625 4.00 2.88 2.378 0.590 0.040 .781-32 UNS W-04 N-04 3/16 x 5/8
BS100L025A 0.7873 0.624
BS100R050A    
BS100R100A    

FB Screw End Conditions

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Screw Number Bearing Mount No. oS1 oS2 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11
BS100R025A FB-20 0.7877 0.625 5.05 3.80 3.10 2.375 0.590 1.217 0.035 .781-32 UNS W-04 N-04 3/16 x 5/8
BS100L025A 0.7873 0.624
BS100R050A    
BS100R100A    
 
 
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