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Idlers for Flat Belts-Straight Type/Crosspiece Groove Straight Type/Crowned Type/Width L110-500 (Part Numbers)

· Product type: Idlers.
· Idlers type: Bearing Built-in.
· Shape of Idlers: Straight type, Crosspiece Groove Straight Type and Crowned Type.
· Shaft Type : Bearing on Each End (2-Bearing in Total)
· The product code series Straight type: ROFAWC, ROFMWC and ROFSWC
· The product code series Crowned Type: ROFAWT, ROFMWT and ROFSWT
· The product code series Crosspiece Groove Straight: ROFAWM, ROFMWM and ROFSWM
· Outer Diameter: 30-80 mm.
· Shaft (Bore) Diameter: 8-35 mm.
· Length: 110-510 mm.
· Idler Engineering Plastic Roller, Steel Roller (TC-RP, TC-RU)

(i)Caution

[Specification Change] Internal bearing material will be changed to SUJ2 equivalent starting in July 2025. Please check here for part numbers with specification changes. Products before and after the change may be mixed in the same shipment, but there are no problems with use.
Please check the content on our website as the PDF does not contain the most up-to-date information.

Part Number

Configured Part Number is shown.

Drawing/Specifications
3D Preview
Part Numbers
Catalog

Straight
ROFAWC·ROFMWC·ROFSWC
ROFAWCS·ROFSWCS Crowned
ROFAWT·ROFMWT·ROFSWT
ROFAWTS·ROFSWTS Crosspiece Groove Straight
ROFAWM·ROFMWM·ROFSWM
ROFAWMS·ROFSWMS Crosspiece Groove Part [ ! ]X ≥ Y

*1 Since the drawing surface of pipe is unpolished, the Inner Dia. d₁ is misshapen to some extent.
[!] For Crosspiece Groove Part Dimensions, see "Pulley, Idler Relief Dimensions."
[!] The bearings are removable. Temporarily held with tape for shipping.

Type			Roller		Bearing (Track Ring / Rolling Element)
Straight	Crowned	Crosspiece Groove Straight	[M] Material	[S] Surface Treatment	[M] Material
ROFAWC	ROFAWT	ROFAWM	Aluminum Alloy	Clear Anodize	SUJ2
ROFAWCS	ROFAWTS	ROFAWMS	Aluminum Alloy	Clear Anodize	SUS440C Equivalent
ROFMWC	ROFMWT	ROFMWM	STKM13A	Electroless Nickel Plating	SUJ2
ROFSWC	ROFSWT	ROFSWM	SUS304	—	SUJ2
ROFSWCS	ROFSWTS	ROFSWMS	SUS304	—	SUS440C Equivalent

Track surface / roller material: SUJ2
*SUJ2 equivalent materials are used in some products. Please check here for part numbers subject to specification changes.

Specification Table

	Part Number	—	d	—	L	—	H	—	X	—	Y	—	Z
(Straight)	ROFAWC40	—	8	—	L200
(Crowned)	ROFAWT30	—	10	—	L350	—	H0.5
(Crosspiece Groove Straight)	ROFSWM50	—	20	—	L250			—	X14.0	—	Y11.8	—	Z5.0

Type	D	d	1 mm Increments	H	Only Crosspiece Groove Straight only			d₁			Bearing Dimension
			L	Crowned only	0.1 mm Increments			Aluminum	Steel	Stainless Steel	No.	D₁	B
			L		X	Y	Z	Alloy	(STKM13A)	(SUS304)	No.	D₁	B
Straight	30	8	110 to 510		7.0 to 15.0	5.0 to 12.0	2.0 to 4.5	15	—	—	698ZZ	19	6
ROFAWC		8 A*						—	15.8	18	608ZZ	22	7
ROFAWCS		10						15			6900ZZ	22	6
ROFMWC		12						15			6901ZZ	24	6
ROFSWC	35	10					4.0 to 6.0	17	18.1	18	6900ZZ	22	6
ROFSWCS		12		0.3							6901ZZ	24	6
		15									6902ZZ	28	7
Crowned	40	8					4.0 to 7.0	17	18.7	20	628ZZ	24	8
ROFAWT		10									6000ZZ	26	8
ROFAWTS		12		0.5							6901ZZ	24	6
ROFMWT		15									6902ZZ	28	7
ROFSWT		20					4.0 to 6.0	22	22.7	22	6804ZZ	32	7
ROFSWTS	50	10					4.0 to 7.0	17	24	22	6200ZZ	30	9
		12		0.8				22			6001ZZ	28	8
Crosspiece Groove Straight		15						17			6902ZZ	28	7
ROFAWM		20						22			6804ZZ	32	7
ROFAWMS		25						27	30	28	6905ZZ	42	9
ROFMWM	(60)	12						22	—	—	6201ZZ	32	10
ROFSWM		15									6002ZZ	32	9
ROFSWMS		20									6904ZZ	37
		25						32			6905ZZ	42
		30						32			6906ZZ	47
	(80)	25						41	—	—	6205ZZ	52	15
		30									6006ZZ	55	13
		35									6907ZZ	55	10

[!] * When D = 30 and d = 8 A, only available in Steel or Stainless Steel. [!] D = (60) or (80) is applicable only for the Aluminum Alloy material. [!] For Crosspiece Groove Straight with D = 30 or 35, only Aluminum Alloy is available as the material.
[!] The bearings are filled with grease.

Unspecified Dimension Tolerance (Excluding d₁)

Dimension Range		Tolerance (mm)
Over	Or Less	Tolerance (mm)
0.5	3	±0.1
3	6	±0.1
6	30	±0.2
30	120	±0.3

[!] Compliant with JIS B 0405 m (Medium Class).

d Hole Tolerance

d (mm)		I.D. Tolerance (mm)

Over	Or Less
0.6	2.5	0 －0.008

2.5	10	0 －0.008

10	18	0 －0.008

18	30	0 －0.010

[!] Compliant with JIS B 1514 Class 0.

General Standard for Shaft Fits (Approx.)

Radial Bearing (Class 0, 6X, 6)
Condition		Ball Bearing		Shaft Tolerances
Condition		Shaft Dia. (mm)
Load Characteristics	Load Size, etc.	Over	Or Less
Inner Ring Rotary Load Non-directional Load Non-directional Load	Light Load Fluctuating Load	—	18	h5
		18	100	js6
		100	200	k6
	Normal Load	-	18	js5
		18	100	k5
		100	140	m5
Inner Ring Static Load	Inner ring needs to move easily on shaft	Total Shaft Diameter		g6
Inner Ring Static Load	Inner ring does not need to move easily on shaft	Total Shaft Diameter		h6

[!] Compliant with JIS B 1566 (2015) Annex B (Reference).
[!] Load Characteristics
·Inner Ring Rotary Load: The load position on the inner ring changes.
·Inner Ring Static Load: The load position on the inner ring does not change.
·Non-directional Load: Load position is uncertain.

Cautions/Prohibitions

Since the drawing surface of pipe is unpolished, the Inner Dia. d1 is misshapen to some extent.
The bearings of this product are removable. Please replace the bearing according to the material and size of the bearing used in this product.
For rust prevention, electroless nickel plating products or SUS304 products are recommend.
T dimension tolerance of belt groove is ±0.2 mm. Check the width tolerance of the flat belt and select the pulley.

Part Number

CAD Data download and 3D preview are not available because the part number has not yet been determined.

*In order to open the CAD Data download and 3D preview screen, the part number must be fixed.
Please confirm the part number from "Specification / Dimension"on the left side, and then perform the CAD Data Download / 3D Preview operation.

CAD Download

: 30; 60; 90

Part Number
ROFSWC40-[12,15,20]-L[110-510/10]
ROFSWC50-10-L[110-500/10]
ROFSWC50-10-L[110-510/1]
ROFSWC50-12-L[110-500/10]
ROFSWC50-12-L[110-510/1]
ROFSWC50-[15,20,25]-L[110-510/1]
ROFSWC50-[15,20,25]-L[110-510/10]
ROFSWM40-8-L[110-500/10]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWM40-8-L[110-510/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWM40-10-L[110-500/10]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWM40-10-L[110-510/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWM40-12-L[110-500/10]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWM40-12-L[110-510/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWM40-15-L[110-500/10]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWM40-15-L[110-510/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWM40-20-L[110-500/10]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-6/0.1]
ROFSWM40-20-L[110-510/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-6/0.1]
ROFSWM50-10-L[110-500/10]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWM50-10-L[110-510/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWM50-12-L[110-500/10]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWM50-12-L[110-510/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWM50-25-L[110-500/10]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWM50-25-L[110-510/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWM50-[15,20]-L[110-510/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWM50-[15,20]-L[110-510/10]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFSWT30-8A-L[110-500/10]-H[0.3,0.5,0.8]
ROFSWT30-8A-L[110-510/1]-H[0.3,0.5,0.8]
ROFSWT30-[10,12]-L[110-510/10]-H[0.3,0.5,0.8]
ROFSWT35-[10,12,15]-L[110-510/1]-H[0.3,0.5,0.8]
ROFSWT35-[10,12,15]-L[110-510/10]-H[0.3,0.5,0.8]
ROFSWT40-[8,10,12,15,20]-L[110-510/10]-H[0.3,0.5,0.8]
ROFSWT50-[10,12,15,20,25]-L[110-510/1]-H[0.3,0.5,0.8]
ROFSWT50-[10,12,15,20,25]-L[110-510/10]-H[0.3,0.5,0.8]

Standard Unit Price	Minimum order quantity	Days to Ship	RoHS	Shape	Outer Dia. D (Ø)	Material	Shaft (Bore) Dia. d (mm)	Surface Treatment	H (mm)	L (mm)	X (mm)	Y (mm)	Z (mm)
-	1 Piece(s)	7 Day(s)	10	Straight	40	SUS304	12 ～ 20	Not Provided	-	110 ～ 510	-	-	-
-	1 Piece(s)	7 Day(s)	10	Straight	50	SUS304	10	Not Provided	-	110 ～ 500	-	-	-
-	1 Piece(s)	7 Day(s)	10	Straight	50	SUS304	10	Not Provided	-	110 ～ 510	-	-	-
-	1 Piece(s)	7 Day(s)	10	Straight	50	SUS304	12	Not Provided	-	110 ～ 500	-	-	-
-	1 Piece(s)	7 Day(s)	10	Straight	50	SUS304	12	Not Provided	-	110 ～ 510	-	-	-
-	1 Piece(s)	7 Day(s)	10	Straight	50	SUS304	15 ～ 25	Not Provided	-	110 ～ 510	-	-	-
-	1 Piece(s)	7 Day(s)	10	Straight	50	SUS304	15 ～ 25	Not Provided	-	110 ～ 510	-	-	-
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	40	SUS304	8	Not Provided	-	110 ～ 500	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	40	SUS304	8	Not Provided	-	110 ～ 510	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	40	SUS304	10	Not Provided	-	110 ～ 500	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	40	SUS304	10	Not Provided	-	110 ～ 510	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	40	SUS304	12	Not Provided	-	110 ～ 500	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	40	SUS304	12	Not Provided	-	110 ～ 510	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	40	SUS304	15	Not Provided	-	110 ～ 500	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	40	SUS304	15	Not Provided	-	110 ～ 510	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	40	SUS304	20	Not Provided	-	110 ～ 500	7 ～ 15	5 ～ 12	4 ～ 6
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	40	SUS304	20	Not Provided	-	110 ～ 510	7 ～ 15	5 ～ 12	4 ～ 6
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	50	SUS304	10	Not Provided	-	110 ～ 500	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	50	SUS304	10	Not Provided	-	110 ～ 510	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	50	SUS304	12	Not Provided	-	110 ～ 500	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	50	SUS304	12	Not Provided	-	110 ～ 510	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	50	SUS304	25	Not Provided	-	110 ～ 500	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	50	SUS304	25	Not Provided	-	110 ～ 510	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	50	SUS304	15 ～ 20	Not Provided	-	110 ～ 510	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crosspiece Groove	50	SUS304	15 ～ 20	Not Provided	-	110 ～ 510	7 ～ 15	5 ～ 12	4 ～ 7
-	1 Piece(s)	7 Day(s)	10	Crowned	30	SUS304	8A	Not Provided	0.3 ～ 0.8	110 ～ 500	-	-	-
-	1 Piece(s)	7 Day(s)	10	Crowned	30	SUS304	8A	Not Provided	0.3 ～ 0.8	110 ～ 510	-	-	-
-	1 Piece(s)	7 Day(s)	10	Crowned	30	SUS304	10 ～ 12	Not Provided	0.3 ～ 0.8	110 ～ 510	-	-	-
-	1 Piece(s)	7 Day(s)	10	Crowned	35	SUS304	10 ～ 15	Not Provided	0.3 ～ 0.8	110 ～ 510	-	-	-
-	1 Piece(s)	7 Day(s)	10	Crowned	35	SUS304	10 ～ 15	Not Provided	0.3 ～ 0.8	110 ～ 510	-	-	-
-	1 Piece(s)	7 Day(s)	10	Crowned	40	SUS304	8 ～ 20	Not Provided	0.3 ～ 0.8	110 ～ 510	-	-	-
-	1 Piece(s)	7 Day(s)	10	Crowned	50	SUS304	10 ～ 25	Not Provided	0.3 ～ 0.8	110 ～ 510	-	-	-
-	1 Piece(s)	7 Day(s)	10	Crowned	50	SUS304	10 ～ 25	Not Provided	0.3 ～ 0.8	110 ～ 510	-	-	-

Product TOP

Basic Information

With or w/o Flange	No Flange	Length L(mm)	~300 / ~500	Type	Idlers (Bearing Built-in)
Shaft Type	1-Bearing on Each End (2-Bearing in Total)	Surface Urethane	Urethane Not Provided

Configure

123 Part Numbers

View Part Numbers

Configure Remaining Specifications

Completed

Specification/Dimensions

Shape
- Straight
- Crowned
- Crosspiece Groove
Clear
Outer Dia. D(Ø)
30

35

40

50

60

80
Clear
Material
- Steel
  - STKM13A
- Aluminum
  - Aluminum Alloy
- SUS304
Clear
Shaft (Bore) Dia. d(mm)
8

8A

10

12

15

20

25

30

35
Clear
Surface Treatment
- Not Provided
- Electroless Nickel Plating
- Clear Anodize
Clear
H(mm)
0.3

0.5

0.8
Clear
L(mm)
[100-510/10mm Unit(s)][110-510/1mm Unit(s)]
Clear
X(mm)
[7-15/0.1mm Unit(s)]
Clear
Y(mm)
[5-12/0.1mm Unit(s)]
Clear
Z(mm)
[2-7/0.1mm Unit(s)]
Clear
type
- ROFAWC
- ROFAWM
- ROFAWT
- ROFMWC
- ROFMWM
- ROFMWT
- ROFSWC
- ROFSWM
- ROFSWT
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

7 Day(s) or Less

9 Day(s) or Less
Clear

Specify Alterations

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

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Idlers for Flat Belts-Straight Type/Crosspiece Groove Straight Type/Crowned Type/Width L110-500 (Part Numbers)

(i)Caution

Specification Table

Cautions/Prohibitions

Part Number

Basic Information

Configure

Specification/Dimensions

Shape

Outer Dia. D(Ø)

Material

Shaft (Bore) Dia. d(mm)

Surface Treatment

H(mm)

L(mm)

X(mm)

Y(mm)

Z(mm)

type

CAD

Days to Ship

Specify Alterations

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