The Precision Alliance - United States

0.5mm Lead Ball Screw Series

The 0.5 mm lead ball screw series leads the way in the miniaturization of precision positioning devices.

A series of 0.5 mm lead ball screws has been created to meet requirements for small-sized and fine-feed ball screws necessary for reduced-size precision positioning devices.
This allows further size reductions in machinery and control units.

World smallest ball screws
The series includes the world’s smallest ball screw, with a screw shaft outside diameter of φ 1.8 mm.

Model number notation

Accuracy & Backlash: Up to JIS Standard C3, 5μm Backlash.
Limited Length: Maximum Length is Calculated by 20 times of the Screw Diameter. (Note: Please consult with our Sales for 1.8mm Dia. Ball Screw for Limited Length）
Nut Form: Other request for Forms or Specifications, Please ask our Sales for details.

Nut dimensions Unit : mm

Model number	Outside diameter	Flange outside diameter	Total length	L1	F	2-hole	PCD	Mounting hole
	D	Df	L			W	Dp	X
FBS0180.5A	6	14	8.5	7	1.5	8	10	2.4
FBS0300.5A	8	16	11	8	3	8	12	2.4
FBS0400.5A	10	20	13	10	3	12	15	2.9
FBS0500.5A	11	23	13	10	3	13	17	3.4
FBS0600.5A	12	25	13	10	3	14	19	3.4
FBS0800.5A	14	27	13	10	3	16	21	3.4

Model number	Screw shaft outside diameter	Lead	Ball diameter	Ball center circle diameter	BCD Lead angle	Screw shaft root diameter	Number of circulations (Turns x circuits)	Basic rated load(N)	Basic rated load(N)	Stiffness
	d	l	Da	BCD		do		Ca	Coa	N/µm K
FBS0180.5A	1.8	0.5	0.4	1.95	4°40´	1.5	2.7X1	110	130	20
FBS0300.5A	3	0.5	0.4	3.10	2°56´	2.6	2.7X1	150	220	30
FBS0400.5A	4	0.5	0.4	4.10	2°13´	3.6	2.7X1	160	290	37
FBS0500.5A	5	0.5	0.4	5.10	1°47´	4.6	2.7X1	180	370	45
FBS0600.5A	6	0.5	0.4	6.10	1°30´	5.6	2.7X1	190	440	51
FBS0800.5A	8	0.5	0.4	8.10	1°08´	7.6	2.7X1	220	590	64

Note 1: Root diameter
When designing the ball screw mounting, the diameter of one of the screw shaft ends must be specified to less than the screw shaft root diameter.
Note 2: Oil is recommended for lubrication. Ask our sales before use.
Note 3: Due to product improvements, the specifications and external appearances of products in this catalog are subject to change without notice.

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