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0.631 In. Diameter - 0.200 In. Lead

This 0.631 inch diameter ball screw has a 0.200 inch lead. Corresponding Standard capacity ball nuts are available with either right-hand or left-hand threads, and corresponding High capacity ball nuts are available with right-hand threads.

Ball screw specifications	RH	LH
Ball screw part no.	BS 063 R 020 A	BS 063 L 020 A
Nominal ball circle diameter	0.631 in.
Lead	0.200 in.
Screw diameter	0.615 in.
Root diameter	0.500 in.
Screw weight	0.83 lb./ft.
Torque to raise 1 pound*	0.035 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)

Ball nut specifications	RH	LH
Ball nut part no. (standard capacity)	BN 063 R 020 S	BN 063 L 020 S
Ball nut with flange part no.	BF 063 R 020 S	BF 063 L 020 S
Dynamic load capacity**	825 lb.
Static load capacity	6,250 lb.
Ball nut weight	0.26 lb.
Nominal ball dia. (avg. ball qty.)	1/8 in. (67)
Flange part no.	FL-0937
Wiper kit part no.	WK-30

** for 1,000,000 inches

High Capacity Ball Nut Specifications (H)

Right hand thread direction shown.

Ball nut specifications	RH
Ball nut part no. high capacity)	BN 063 R 020 H
Ball nut with flange part no.	BF 063 R 020 H
Dynamic load capacity**	1,650 lb.
Static load capacity	9,000 lb.
Ball nut weight	0.51 lb.
Nominal ball dia. (avg. ball qty.)	1/8 in. (134)
Flange part no.	FL-0937
Wiper kit part no.	WK-30A

** for 1,000,000 inches

2D/3D Drawings

Product Media

2D/3D DRAWINGS .631 X .200 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 EFFECT OF CHANGE IN PARAMETER

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

jack

Screw Number	Bearing Mount No.	A	B	C	D	E	F	G	H	I	J	K
BS063R020A	SB-12	3.000	1.875	1.000	0.375	1.125	1.125	2.250	0.672	1.344	.281 (4x)	.406 Thru
BS063L020A												.625 C'Bore
												.875 Deep

DB Bearing Blocks

jack

Screw Number	Bearing Mount No.	A	B	C	D	E	F	G	H	I	J	K	L
BS063R020A	DB-12	3.000	1.875	1.000	0.375	1.125	1.125	2.250	0.672	1.344	.281 (4x)	.406 Thru	N/A
BS063L020A												.625 C'Bore
												.875 Deep

FB Bearing Blocks

jack

Screw Number	Bearing Mount No.	A	B	C	D	E	F	G	H	I	J	K	L
BS063R020A	FB-12	3.000	1.875	1.000	1.125	4.262	0.438	2.250	1.688	1.063	2.125	.250 Thru	.406 Thru
BS063L020A												.375 C'Bore	.625 C'Bore
												#5 Taper Pin	1.130 Deep

SB Screw End Conditions

jack

Screw Number	Bearing Mount No.	oS1	A1	A2	A3	A4	A5	A6	o A7	A8	A9	A10	A11
BS063R020A	SB-12	0.4726	0.890	0.450	0.56	0.127	0.472	1.029	1.25	.469-32 UNS	W-01	N-01	6301
BS063L020A	SB-12	0.4723	0.890	0.450	0.56	0.125	0.472	1.029	1.25	.469-32 UNS	W-01	N-01	6301

DB Screw End Conditions

jack

Screw Number	Bearing Mount No.	oS1	oS2	A1	A2	A3	A4	A5	A6	A7	A8	A9
BS063R020A	DB-12	0.4726	0.406	3.29	2.00	1.566	0.472	0.000	.469-32 UNS	W-01	N-01	1/8 x 5/8
BS063L020A	DB-12	0.4723	0.405	3.29	2.00	1.566	0.472	0.000	.469-32 UNS	W-01	N-01	1/8 x 5/8

FB Screw End Conditions

jack

Screw Number	Bearing Mount No.	oS1	oS2	A1	A2	A3	A4	A5	A6	A7	A8	A9	A10	A11
BS063R020A	FB-12	0.4726	0.406	4.30	3.00	2.35	1.850	0.472	0.923	0.038	.469-32 UNS	W-01	N-01	1/8 x 5/8
BS063L020A	FB-12	0.4723	0.405	4.30	3.00	2.35	1.850	0.472	0.923	0.038	.469-32 UNS	W-01	N-01	1/8 x 5/8

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