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Idlers for Flat Belts-Straight Type/Crosspiece Groove Straight Type/Crowned Type/Width L25-100

Idlers for Flat Belts-Straight Type/Crosspiece Groove Straight Type/Crowned Type/Width L25-100

MISUMI

MISUMI

· 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: ROFAN and ROFAF.
· The product code series Crosspiece Groove Straight: ROFAM.
· The product code series Crowned Type: ROFAC.
· Idlers Material: Aluminum Alloy
· Surface Treatment solution: Clear Anodize
· Outer Diameter: 15-80 mm.
· Shaft (Bore) Diameter: 5-35 mm.
· Length: 25-100 mm.
· Pulleys for Flat Belts - Flanged, Crowned, Press-Fit Urethane

(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.

PDFP.1-1330-2014

Part Number

Configured Part Number is shown.

Straight
ROFAN·ROFANS (No Flange) Crosspiece Groove Straight
ROFAM·ROFAMS (No Flange) Crowned
ROFAC·ROFACS (No Flange)  
ROFAF·ROFAFS (Flanged) Crosspiece Groove Part [ ! ] X ≥ Y

[ ! ] For Crosspiece Groove Part Dimensions, see "Pulley, Idler Relief Dimensions."


* Bearing Accuracy: JIS B1514 Class 0
[ ! ] The bearings are filled with grease.
[ ! ] Bearings are press-fitted. Use a puller to remove them. See here for pullers
[ ! ] Unless otherwise specified, the dimension tolerance
conforms to JIS B 0405 Class m (Medium Class).
Unspecified Dimension Tolerance
(Excluding d1)
Dimension RangeTolerance
(mm)
OverOr Less
0.53±0.1
36±0.1
630±0.2
30120±0.3
[!] Compliant with JIS B
0405 m (Medium Class).

 

d Hole Tolerance
d
(mm)		I.D. Tolerance
(mm)
OverOr Less
0.62.5   0
－0.008
2.510   0
－0.008
1018   0
－0.008
1830   0
－0.010
[!] Compliant with JIS B 1514 Class 0.
Type[M] Material[S] Surface Treatment[M] Material
Straight
(No Flange)		Straight
(Flanged)		Crosspiece Groove StraightCrownedBearing (Track Ring / Rolling Element)
ROFANROFAFROFAMROFACAluminum AlloyClear AnodizeSUJ2
ROFANSROFAFSROFAMSROFACSSUS440C Equivalent
ROFMNROFMFROFMMROFMCS45CElectroless Nickel PlatingSUJ2
ROFSSN—ROFSSMROFSSCSUS304—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

■ Straight
Part Number—d—L
ROFAN30—10—L52
■Crosspiece Groove Straight
Part Number—d—L—X—Y—Z
ROFAM40—12—L82—X7.8—Y6.0—Z5.0
■Crowned
Part Number—d—L—H
ROFAC60—20—L75—H0.5
Part Numberd1 mm IncrementsCrosspiece Groove Straight OnlyCrowned onlyd1Bearing DimensionF
0.1 mm Increments
TypeDLXYZHNo.D1B
Straight (No Flange)15(5) ——— 7675ZZ82.5—
ROFAN(6)  9676ZZ103
ROFANS20(6)  10686ZZ135—
ROFMN(8)  10678ZZ123.5
ROFSSN256 Straight 10696ZZ15526
 (8)Crowned 688ZZ16
Straight (Flanged)308 25 to 1007.0 to 15.05.0 to 12.02.0 to 4.5 15698ZZ19631
ROFAF(10)  6900ZZ22
ROFAFS(12)Crosspiece Groove 6901ZZ24
ROFMF3510 Straight4.0 to 6.0 176900ZZ22636
 12 50 to 100 6901ZZ24
Crosspiece Groove Straight(15) 0.36902ZZ287
ROFAM408  4.0 to 7.0 17628ZZ24841
ROFAMS10  0.56000ZZ26
ROFMM12   6901ZZ246
ROFSSM15 L ≥ B × 2+20.86902ZZ287
 (20) 4.0 to 6.0 226804ZZ32
Crowned5010  4.0 to 7.0 176200ZZ30951
ROFAC12   226001ZZ288
ROFACS15   176902ZZ7
ROFMC20   276904ZZ379
ROFSSC(25)  6905ZZ42
 6012   226201ZZ321061
[!] Crosspiece Groove Straight is only available in D dimension 30 or larger.15   6002ZZ9
[ ! ] Crosspiece Groove Straight is only available in D dimension 30 or larger.20   6904ZZ379
　25   326905ZZ42
 30   6906ZZ47
 8025   416205ZZ521581
 30   6006ZZ5513
 35   6907ZZ10
[!] Sizes in ( ) for d are only applicable to No Flange Type.
[!] The bearings are filled with grease.
[!] Bearings are press-fitted. Use a puller to remove them.
General Standard for Shaft Fits (Approx.)
 
ConditionBall BearingShaft
Tolerances
Shaft Dia. (mm)
Load CharacteristicsLoad Size, etc.OverOr Less
Inner Ring
Rotary Load

Non-directional Load
Non-directional Load		Light Load
Fluctuating Load		—18h5
18100js6
100200k6
Normal Load-18js5
18100k5
100140m5
Inner Ring
Static Load		Inner ring needs to move easily on shaftTotal Shaft Diameterg6
Inner ring does not need to move easily on shaftTotal Shaft Diameterh6
[!] 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

  • 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.
  • The idler hole tolerance is 0/-0.03.

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.
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CAD Download

30
45
60
  1. 1
Part Number
ROFAC15-[5,​6]-L[25-210/1]-H[0.3,​0.5,​0.8]
ROFAC20-[6,​8]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROFAC25-[6,​8]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROFAC30-[8,​10,​12]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROFAC35-[10,​12,​15]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROFAC40-[8,​10,​12,​15,​20]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROFAC50-[10,​12,​15,​20,​25]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROFAC60-[12,​15,​20,​25,​30]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROFAC80-[25,​30,​35]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROFAF25-6-L[25-100/1]
ROFAF30-8-L[25-100/1]
ROFAF35-[10,​12]-L[25-100/1]
ROFAF40-8-L[25-100/1]
ROFAF40-10-L[25-100/1]
ROFAF40-[12,​15]-L[25-100/1]
ROFAF50-10-L[25-100/1]
ROFAF50-12-L[25-100/1]
ROFAF50-[15,​20]-L[25-100/1]
ROFAF60-12-L[25-100/1]
ROFAF60-15-L[25-100/1]
ROFAF60-[20,​25,​30]-L[25-100/1]
ROFAF80-[25,​30,​35]-L[25-100/1]
ROFAM30-[8,​10,​12]-L[50-100/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[2-4.5/0.1]
ROFAM35-[10,​12,​15]-L[50-100/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-6/0.1]
ROFAM40-8-L[50-100/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFAM40-10-L[50-100/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFAM40-20-L[50-100/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-6/0.1]
ROFAM40-[12,​15]-L[50-100/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFAM50-10-L[50-100/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFAM50-12-L[50-100/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFAM50-25-L[50-100/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFAM50-[10,​12,​15,​20]-L[50-100/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFAM60-12-L[50-100/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFAM60-15-L[50-100/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFAM60-[20,​25,​30]-L[50-100/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFAM80-[25,​30,​35]-L[50-100/1]-X[7-15/0.1]-Y[5-12/0.1]-Z[4-7/0.1]
ROFAN15-[5,​6]-L[25-100/1]
ROFAN20-[6,​8]-L[25-100/1]
ROFAN25-[6,​8]-L[25-100/1]
ROFAN30-[8,​10,​12]-L[25-100/1]
ROFAN35-[10,​12,​15]-L[25-100/1]
ROFAN40-8-L[25-100/1]
ROFAN40-10-L[25-100/1]
ROFAN40-[12,​15,​20]-L[25-100/1]
ROFAN50-10-L[25-100/1]
ROFAN50-12-L[25-100/1]
ROFAN50-[15,​20,​25]-L[25-100/1]
ROFAN60-12-L[25-100/1]
ROFAN60-15-L[25-100/1]
ROFAN60-[20,​25,​30]-L[25-100/1]
ROFAN80-[25,​30,​35]-L[25-100/1]
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipRoHSShape With or w/o Flange Outer Dia. D
(Ø) 		Shaft (Bore) Dia. d
(mm) 		H
(mm) 		L
(mm) 		X
(mm) 		Y
(mm) 		Z
(mm)

-

1 Piece(s) 7 Day(s) 10CrownedNo Flange155 ～ 60.3 ～ 0.825 ～ 210---

-

1 Piece(s) 7 Day(s) 10CrownedNo Flange206 ～ 80.3 ～ 0.825 ～ 100---

-

1 Piece(s) 7 Day(s) 10CrownedNo Flange256 ～ 80.3 ～ 0.825 ～ 100---

-

1 Piece(s) 7 Day(s) 10CrownedNo Flange308 ～ 120.3 ～ 0.825 ～ 100---

-

1 Piece(s) 7 Day(s) 10CrownedNo Flange3510 ～ 150.3 ～ 0.825 ～ 100---

-

1 Piece(s) 7 Day(s) 10CrownedNo Flange408 ～ 200.3 ～ 0.825 ～ 100---

-

1 Piece(s) 7 Day(s) 10CrownedNo Flange5010 ～ 250.3 ～ 0.825 ～ 100---

-

1 Piece(s) 7 Day(s) 10CrownedNo Flange6012 ～ 300.3 ～ 0.825 ～ 100---

-

1 Piece(s) 7 Day(s) 10CrownedNo Flange8025 ～ 350.3 ～ 0.825 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightFlange256-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightFlange308-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightFlange3510 ～ 12-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightFlange408-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightFlange4010-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightFlange4012 ～ 15-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightFlange5010-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightFlange5012-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightFlange5015 ～ 20-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightFlange6012-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightFlange6015-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightFlange6020 ～ 30-25 ～ 100---

-

1 Piece(s) 9 Day(s) 10StraightFlange8025 ～ 35-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10Crosspiece GrooveNo Flange308 ～ 12-50 ～ 1007 ～ 155 ～ 122 ～ 4.5

-

1 Piece(s) 7 Day(s) 10Crosspiece GrooveNo Flange3510 ～ 15-50 ～ 1007 ～ 155 ～ 124 ～ 6

-

1 Piece(s) 7 Day(s) 10Crosspiece GrooveNo Flange408-50 ～ 1007 ～ 155 ～ 124 ～ 7

-

1 Piece(s) 7 Day(s) 10Crosspiece GrooveNo Flange4010-50 ～ 1007 ～ 155 ～ 124 ～ 7

-

1 Piece(s) 7 Day(s) 10Crosspiece GrooveNo Flange4020-50 ～ 1007 ～ 155 ～ 124 ～ 6

-

1 Piece(s) 7 Day(s) 10Crosspiece GrooveNo Flange4012 ～ 15-50 ～ 1007 ～ 155 ～ 124 ～ 7

-

1 Piece(s) 7 Day(s) 10Crosspiece GrooveNo Flange5010-50 ～ 1007 ～ 155 ～ 124 ～ 7

-

1 Piece(s) 7 Day(s) 10Crosspiece GrooveNo Flange5012-50 ～ 1007 ～ 155 ～ 124 ～ 7

-

1 Piece(s) 7 Day(s) 10Crosspiece GrooveNo Flange5025-50 ～ 1007 ～ 155 ～ 124 ～ 7

-

1 Piece(s) 7 Day(s) 10Crosspiece GrooveNo Flange5010 ～ 20-50 ～ 1007 ～ 155 ～ 124 ～ 7

-

1 Piece(s) 7 Day(s) 10Crosspiece GrooveNo Flange6012-50 ～ 1007 ～ 155 ～ 124 ～ 7

-

1 Piece(s) 7 Day(s) 10Crosspiece GrooveNo Flange6015-50 ～ 1007 ～ 155 ～ 124 ～ 7

-

1 Piece(s) 7 Day(s) 10Crosspiece GrooveNo Flange6020 ～ 30-50 ～ 1007 ～ 155 ～ 124 ～ 7

-

1 Piece(s) 9 Day(s) 10Crosspiece GrooveNo Flange8025 ～ 35-50 ～ 1007 ～ 155 ～ 124 ～ 7

-

1 Piece(s) 7 Day(s) 10StraightNo Flange155 ～ 6-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightNo Flange206 ～ 8-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightNo Flange256 ～ 8-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightNo Flange308 ～ 12-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightNo Flange3510 ～ 15-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightNo Flange408-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightNo Flange4010-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightNo Flange4012 ～ 20-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightNo Flange5010-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightNo Flange5012-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightNo Flange5015 ～ 25-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightNo Flange6012-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightNo Flange6015-25 ～ 100---

-

1 Piece(s) 7 Day(s) 10StraightNo Flange6020 ～ 30-25 ～ 100---

-

1 Piece(s) 9 Day(s) 10StraightNo Flange8025 ～ 35-25 ～ 100---

Loading...

  1. 1
 

Basic Information

Length L(mm) ~50 / ~100 Type Idlers (Bearing Built-in) Material Aluminum Alloy
Shaft Type 1-Bearing on Each End (2-Bearing in Total) Surface Urethane Urethane Not Provided Surface Treatment Clear Anodize

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Specification/Dimensions

  • Shape

    • Straight
    • Crowned
    • Crosspiece Groove

    Clear

  • With or w/o Flange

    • Flange
    • No Flange

    Clear

  • Outer Dia. D(Ø)

    • 15
    • 20
    • 25
    • 30
    • 35
    • 40
    • 50
    • 60
    • 80

    Clear

  • Shaft (Bore) Dia. d(mm)

    • 5
    • 6
    • 8
    • 10
    • 12
    • 15
    • 20
    • 25
    • 30
    • 35

    Clear

  • H(mm)

    • 0.3
    • 0.5
    • 0.8

    Clear

  • L(mm)

     [25-210/1mm 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

    • ROFAC
    • ROFAF
    • ROFAM
    • ROFAN

    Clear

  • CAD

    • 2D
    • 3D

    Clear

Days to Ship

    • All
    • 7 Day(s) or Less
    • 9 Day(s) or Less

    Clear

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