Tsubaki product selection

Chain Tensioner / Idler wheels

Chain tensioner and FR idler sprocket: essential parts for chain drives
A large amount of chain slack can cause vibration and noise, and can lead to poor meshing with the sprocket, preventing smooth chain transmission.
Tsubaki chain tensioners adjust chain slack to maintain normal chain transmission.
The FR idler sprocket has a hub bearing, which transmits stable rotation.

Chain tensioner

Product name and features
	CT-TCS type Oscillating tensioner with idler sprocket. *Go to Drive Chain Accessories page.	Detail
	CT-ETS type Direct acting tensioner with idler sprocket. *Go to Drive Chain Accessories page.	Detail
	CT-TA type Direct acting tensioner with plastic shoes. *Go to Drive Chain Accessories page.	Detail
	CT-TH type Idler sprockets can be selected, making handling easier and more convenient Direct acting chain tensioner. *Go to Drive Chain Accessories page.	Detail

FR idler sprocket

The hub bearing transmits stable rotation.
A wide variety of models are available. Can also be used as an idler for the CT-TH type chain tensioner.
*Two types: ball bearing specification and oil-less bush specification

Application Examples

Prevents sagging when the shaft distance is long

Intermediate idler for multi-shaft drive

When the chain winding angle is insufficient

Model number display example

FR	B	-	RS40	-	15T	-	N
｜｜｜｜｜	｜｜		｜ Size		｜ Number of teeth		｜ Surface Treatment
	Bearing specifications B: Ball bearing specification L: Oil-less bushing specification						N: No plating K: Electroless nickel-phosphorus plating
FR idler sprocket

List of varieties and dimensions

Applicable chain numbers and number of teeth (all hardened tooth tips)

chain number	Number of teeth
chain number	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25
RS35										●	●	●	●	●	●	●	●
RS40						●	●	●	●	●	●	●
RS50				●	●	●	●	●	●
RS60			●	●	●	●
RS80	●	●	●	●	●

All teeth hardened
Chain	Number of teeth	Pitch circle diameter Dp mm	Outer diameter Do mm	tooth width t mm	Model number, DXF Drawing, 3D CAD data, PDF drawing
					Ball bearing specifications		Oil-less bushing specifications
					No plating	Electroless nickel-phosphorus plating	No plating	Electroless nickel-phosphorus plating
RS35	18	54.85	60	4.4	FRB-RS35-18TQ-N DXF・3DCAD・ PDF	FRB-RS35-18TQ-K DXF・3DCAD・ PDF	FRL-RS35-18TQ-N DXF・3DCAD・ PDF	FRL-RS35-18TQ-K DXF・3DCAD・ PDF
	19	57.87	63		FRB-RS35-19TQ-N DXF・3DCAD・ PDF	FRB-RS35-19TQ-K DXF・3DCAD・ PDF	FRL-RS35-19TQ-N DXF・3DCAD・ PDF	FRL-RS35-19TQ-K DXF・3DCAD・ PDF
	20	60.89	66		FRB-RS35-20TQ-N DXF・3DCAD・ PDF	FRB-RS35-20TQ-K DXF・3DCAD・ PDF	FRL-RS35-20TQ-N DXF・3DCAD・ PDF	FRL-RS35-20TQ-K DXF・3DCAD・ PDF
	21	63.91	69		FRB-RS35-21TQ-N DXF・3DCAD・ PDF	FRB-RS35-21TQ-K DXF・3DCAD・ PDF	FRL-RS35-21TQ-N DXF・3DCAD・ PDF	FRL-RS35-21TQ-K DXF・3DCAD・ PDF
	22	66.93	72		FRB-RS35-22TQ-N DXF・3DCAD・ PDF	FRB-RS35-22TQ-K DXF・3DCAD・ PDF	FRL-RS35-22TQ-N DXF・3DCAD・ PDF	FRL-RS35-22TQ-K DXF・3DCAD・ PDF
	23	69.95	75		FRB-RS35-23TQ-N DXF・3DCAD・ PDF	FRB-RS35-23TQ-K DXF・3DCAD・ PDF	FRL-RS35-23TQ-N DXF・3DCAD・ PDF	FRL-RS35-23TQ-K DXF・3DCAD・ PDF
	24	72.97	78		FRB-RS35-24TQ-N DXF・3DCAD・ PDF	FRB-RS35-24TQ-K DXF・3DCAD・ PDF	FRL-RS35-24TQ-N DXF・3DCAD・ PDF	FRL-RS35-24TQ-K DXF・3DCAD・ PDF
	25	76.00	81		FRB-RS35-25TQ-N DXF・3DCAD・ PDF	FRB-RS35-25TQ-K DXF・3DCAD・ PDF	FRL-RS35-25TQ-N DXF・3DCAD・ PDF	FRL-RS35-25TQ-K DXF・3DCAD・ PDF
RS40	14	57.07	63	7.3	FRB-RS40-14TQ-N DXF・3DCAD・ PDF	FRB-RS40-14TQ-K DXF・3DCAD・ PDF	FRL-RS40-14TQ-N DXF・3DCAD・ PDF	FRL-RS40-14TQ-K DXF・3DCAD・ PDF
	15	61.08	67		FRB-RS40-15TQ-N DXF・3DCAD・ PDF	FRB-RS40-15TQ-K DXF・3DCAD・ PDF	FRL-RS40-15TQ-N DXF・3DCAD・ PDF	FRL-RS40-15TQ-K DXF・3DCAD・ PDF
	16	65.10	71		FRB-RS40-16TQ-N DXF・3DCAD・ PDF	FRB-RS40-16TQ-K DXF・3DCAD・ PDF	FRL-RS40-16TQ-N DXF・3DCAD・ PDF	FRL-RS40-16TQ-K DXF・3DCAD・ PDF
	17	69.12	75		FRB-RS40-17TQ-N DXF・3DCAD・ PDF	FRB-RS40-17TQ-K DXF・3DCAD・ PDF	FRL-RS40-17TQ-N DXF・3DCAD・ PDF	FRL-RS40-17TQ-K DXF・3DCAD・ PDF
	18	73.14	78		FRB-RS40-18TQ-N DXF・3DCAD・ PDF	FRB-RS40-18TQ-K DXF・3DCAD・ PDF	FRL-RS40-18TQ-N DXF・3DCAD・ PDF	FRL-RS40-18TQ-K DXF・3DCAD・ PDF
	19	77.16	83		FRB-RS40-19TQ-N DXF・3DCAD・ PDF	FRB-RS40-19TQ-K DXF・3DCAD・ PDF	FRL-RS40-19TQ-N DXF・3DCAD・ PDF	FRL-RS40-19TQ-K DXF・3DCAD・ PDF
	20	81.18	88		FRB-RS40-20TQ-N DXF・3DCAD・ PDF	FRB-RS40-20TQ-K DXF・3DCAD・ PDF	FRL-RS40-20TQ-N DXF・3DCAD・ PDF	FRL-RS40-20TQ-K DXF・3DCAD・ PDF
RS50	12	61.34	68	8.9	FRB-RS50-12TQ-N DXF・3DCAD・ PDF	FRB-RS50-12TQ-K DXF・3DCAD・ PDF	FRL-RS50-12TQ-N DXF・3DCAD・ PDF	FRL-RS50-12TQ-K DXF・3DCAD・ PDF
	13	66.33	73		FRB-RS50-13TQ-N DXF・3DCAD・ PDF	FRB-RS50-13TQ-K DXF・3DCAD・ PDF	FRL-RS50-13TQ-N DXF・3DCAD・ PDF	FRL-RS50-13TQ-K DXF・3DCAD・ PDF
	14	71.34	79		FRB-RS50-14TQ-N DXF・3DCAD・ PDF	FRB-RS50-14TQ-K DXF・3DCAD・ PDF	FRL-RS50-14TQ-N DXF・3DCAD・ PDF	FRL-RS50-14TQ-K DXF・3DCAD・ PDF
	15	76.35	84		FRB-RS50-15TQ-N DXF・3DCAD・ PDF	FRB-RS50-15TQ-K DXF・3DCAD・ PDF	FRL-RS50-15TQ-N DXF・3DCAD・ PDF	FRL-RS50-15TQ-K DXF・3DCAD・ PDF
	16	81.37	89		FRB-RS50-16TQ-N DXF・3DCAD・ PDF	FRB-RS50-16TQ-K DXF・3DCAD・ PDF	FRL-RS50-16TQ-N DXF・3DCAD・ PDF	FRL-RS50-16TQ-K DXF・3DCAD・ PDF
	17	86.39	94		FRB-RS50-17TQ-N DXF・3DCAD・ PDF	FRB-RS50-17TQ-K DXF・3DCAD・ PDF	FRL-RS50-17TQ-N DXF・3DCAD・ PDF	FRL-RS50-17TQ-K DXF・3DCAD・ PDF
RS60	11	67.62	76	11.9	FRB-RS60-11TQ-N DXF・3DCAD・ PDF	FRB-RS60-11TQ-K DXF・3DCAD・ PDF	FRL-RS60-11TQ-N DXF・3DCAD・ PDF	FRL-RS60-11TQ-K DXF・3DCAD・ PDF
	12	73.60	82		FRB-RS60-12TQ-N DXF・3DCAD・ PDF	FRB-RS60-12TQ-K DXF・3DCAD・ PDF	FRL-RS60-12TQ-N DXF・3DCAD・ PDF	FRL-RS60-12TQ-K DXF・3DCAD・ PDF
	13	79.60	89		FRB-RS60-13TQ-N DXF・3DCAD・ PDF	FRB-RS60-13TQ-K DXF・3DCAD・ PDF	FRL-RS60-13TQ-N DXF・3DCAD・ PDF	FRL-RS60-13TQ-K DXF・3DCAD・ PDF
	14	85.61	95		FRB-RS60-14TQ-N DXF・3DCAD・ PDF	FRB-RS60-14TQ-K DXF・3DCAD・ PDF	FRL-RS60-14TQ-N DXF・3DCAD・ PDF	FRL-RS60-14TQ-K DXF・3DCAD・ PDF
RS80	9	74.26	85	15.0	FRB-RS80-9TQ-N DXF・3DCAD・ PDF	FRB-RS80-9TQ-K DXF・3DCAD・ PDF	FRL-RS80-9TQ-N DXF・3DCAD・ PDF	FRL-RS80-9TQ-K DXF・3DCAD・ PDF
	10	82.20	93		FRB-RS80-10TQ-N DXF・3DCAD・ PDF	FRB-RS80-10TQ-K DXF・3DCAD・ PDF	FRL-RS80-10TQ-N DXF・3DCAD・ PDF	FRL-RS80-10TQ-K DXF・3DCAD・ PDF
	11	90.16	101		FRB-RS80-11TQ-N DXF・3DCAD・ PDF	FRB-RS80-11TQ-K DXF・3DCAD・ PDF	FRL-RS80-11TQ-N DXF・3DCAD・ PDF	FRL-RS80-11TQ-K DXF・3DCAD・ PDF
	12	98.14	108		FRB-RS80-12TQ-N DXF・3DCAD・ PDF	FRB-RS80-12TQ-K DXF・3DCAD・ PDF	FRL-RS80-12TQ-N DXF・3DCAD・ PDF	FRL-RS80-12TQ-K DXF・3DCAD・ PDF
	13	106.14	118		FRB-RS80-13TQ-N DXF・3DCAD・ PDF	FRB-RS80-13TQ-K DXF・3DCAD・ PDF	FRL-RS80-13TQ-N DXF・3DCAD・ PDF	FRL-RS80-13TQ-K DXF・3DCAD・ PDF