DO-B series

DO-B type（Cross recessed head）

DO-B type（Cross recessed head and Rosette coined）

DO-B type（Hex socket screw）

Outer diameter 16 to 20 mm Outer diameter 21 to 25 mm Outer diameter 26 to 30 mm Outer diameter 31 to 40 mm
Plastics Convex round (O-type)Screw shaft (B-type)D-series DO-series Hex socket screw

Convex round and screw shaft type | Plastic bearing | DO-B

Please refer to the catalog for detailed dimensional information.

Model	Boundary dimensions　[mm]
Model	D	B	C	L	Da	Screw specification	Rosette coined	Part No.
1	19	6	0.5	8	8.2	M6 P1.0	–	DO-19-B0.5
2			1				●	DO-19-B1-M6×8
			2					DO-19-B2-M6×8
			3					DO-19-B3
2	22	7	0.5	8	9.5	M6 P1.0	–	DO-22-B0.5
			1				●	DO-22-B1-M6×8
			2					DO-22-B2
			3					DO-22-B3-M6×8
			4					DO-22-B4-M6×8
			5					DO-22-B5
			6					DO-22-B6-M6×8
1	24	7	0.5	8	9.5	M6 P1.0	–	DO-24-B0.5
2			1				●	DO-24-B1-M6×8
			2					DO-24-B2
			3					DO-24-B3
1	26	7	0.5	8	9.5	M6 P1.0	–	DO-26-B0.5
2			1				●	DO-26-B1-M6×8
			2					DO-26-B2-M6×8
			3					DO-26-B3-M6×8
			4					DO-26-B4-M6×8
			5					DO-26-B5-M6×8
			6					DO-26-B6-M6×8
1	28	7	0.5	8	9.5	M6 P1.0	–	DO-28-B0.5
2			1				●	DO-28-B1-M6×8
			2					DO-28-B2-M6×8
			3					DO-28-B3-M6×8
1	30	7	0.5	8	9.5	M6 P1.0	–	DO-30-B0.5-M6×8
2			1				●	DO-30-B1-M6×8
			2					DO-30-B2-M6×8
			3					DO-30-B3

If you would like to know more about the meaning of the product name codes, please see the configuration of part numbers.

No	Item	Symbol	Meaning
①	Outer race material symbol	D	Polyacetal resin
②	Outer race shape symbol	O	Convex round
③	Retainer or full ball type	Omitted	Retainer (Polypropylene)
④	Outer race outer diameter	–	(Numerical φD dimension shown in drawing)
⑤	Ball material symbol	Omitted	Carbon steel ball
⑥	Inner race shape symbol	B	Screw shaft
⑦	Inner race material symbol	Omitted	Carbon steel (Plating, Black oxide treatment)
⑧	Bore and clearance dimension for mounting	–	(Numerical C dimension shown in drawing)
⑨	Additional information	JH	Hex socket screw
⑨	Additional information	M6×8	Screw specification × Screw length L dimension