Idlers, Backside Belt Tensioning

As a mechanism for transmitting the rotational power generated by the motor, timing pulleys, timing belt idlers and timing belts are usually widely used in design.
During the actual assembly process, the timing belt can be tensioned through the back tensioning idler pulley.

Feature 1: The idler pulley for back tensioning of MISUMI timing belt can be applied to all toothed belts.
Feature 2: MISUMI timing belt idler pulleys for tensioning the back side do not come into contact with the tooth surface, greatly reducing wear on the teeth.
Feature 3: The idler wheel is used for tensioning the back of the MISUMI timing belt, which will not contact the tooth surface, and the tensioning position can be adjusted at will.
Feature 4: The idler pulley for tensioning the back of the MISUMI timing belt can be installed on the outside of the loose edge close to the pulley to increase the wrap angle of the belt.
Feature 5: MISUMI timing belt idler pulley complies with industry standards, with stable procurement and easy equipment maintenance.
Feature 6: MISUMI timing belt idler pulleys are available in a variety of materials to adapt to various designs and usage environments.

The bearings are press-fitted. *Bearing accuracy JIS B1514 level 0 (before press-fitting)

■Dimensional specification table Center bearing type

Type		outer diameter D	F	A	Applicable belt nominal width		S	Bearing model and size
Type	Applicable Belt				inch	mm		No.	d	B
C－AFBD(no Flange type) C－AFDF(With Flange type)	9	20	25	5	－	040	2.5	695ZZ	5	4
		25	30
	10			6	019	－		696ZZ	6	5
	11			7	－	060	3
	11.5			7.5	025	－	3.25
	14	30	35	9	031		4	698ZZ	8	6
	15			11	037	100	4.5
	16	40	48				4	6000ZZ	10	8
	19	30	36	14	050	－	6.5	698ZZ	8	6
		35	45				5.5	628ZZ		8
C－AFBD(no Flange type) C－AFDF(With Flange type)	22	35	45	17	－	150	7	6000ZZ	10	8
		*45	55				6.5	6200ZZ		9
	26	40	48	21	075	－	9	6000ZZ		8

Dimensions marked with * are only available for C-AFDF

■Dimensional specification table Bearing type on both sides

Type		Nominal Model	outer diameter D	F	A	Applicable belt nominal width		Bearing model and size
Type	Applicable Belt					inch	mm	No.	d	B
C－AFBD(no Flange type) C－AFDF(With Flange type)	9	15	15	18	5	－	040	675ZZ×2	5	2.5
	11	15	15	18	7		060	675ZZ×2	5	2.5
		20	20	25				676ZZ×2	6	3
	11.5	*15	15	18	7.5	025	－	675ZZ×2	5	2.5
	15	25	25	30	11	037	100	688ZZ×2	8	5
	19			32	14	050	－
		30W	30	36
	22	25	25	32	17	－	150
		35W	35	45				6000ZZ×2	10	8
	26	40W	40	48	21	075	－
		*45W	45	55				6201ZZ×2	12	10
	27	60	60	67	22	－	200
	32	45	45	55	27	100	250
		65	65	74
	37	55	55	67	32	－	300
	45	70	70	80	40	150	－	6202ZZ×2	15	11
	49	*60	60	67	44	－	400

For detailed sales models, please refer to the MISUMI official website.
Dimensions marked with * are only available for C-AFDF

① Do not use the idler pulley for back tensioning on polyurethane timing belts.

Timing Belts, Timing Pulleys, Idler Technical Information
①Selection of timing pulleys and timing belts, tensioning force and other data (transmission)。
②timing pulley and timing belt selection data, tensioning force and other data (transmission)。
③The main causes and countermeasures for damage, breakage, abnormal noise, etc. of the timing belt。
④Reference materials on timing belt replacement intervals.。
⑤Timing pulley, idler dimensional tolerance information。