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Pulleys for Flat Belts (Width L=25 ~ 100) - Crowned, Crosspiece Groove Straight

Pulleys for Flat Belts (Width L=25 ~ 100) - Crowned, Crosspiece Groove Straight

· The Pulleys for Flat Belts ROBAC, ROBACF, and ROBAM types are specific pulleys manufactured by MISUMI.
· Shaft of Pulleys : Crowned and Crosspiece Groove Straight type.
· The series code of Crowned type: ROBAC, ROBACF.
· The series code of Crosspiece Groove type: ROBAM.
· Shaft Type : Round Hole.
· Pulleys Body Material: Aluminum Alloy.
· Surface Treatment solution: Clear Anodize
· Outer Diameter: 15-80 mm.
· Shaft (Bore) Diameter: 8-35 mm.
· Length: 25-100 mm.
· Idlers for Flat Belts (Width L25-100) -Straight Type/Crosspiece Groove Straight Type/Crowned Type

Crowned
ROBAC (No Flange)
Crosspiece Groove Straight
ROBAM (No Flange)
■Keyway Machining Shape ROBACF (Flanged) Crosspiece Groove Part Pulleys for Flat Belts - Width L = 25 to 100: Related Image
[ ! ] Unless otherwise specified, the dimension tolerance conforms to JIS B 0405 Class m.
TypeMaterialSurface Treatment
Crowned (No Flange)Crowned (Flanged)Crosspiece Groove Straight
ROBACROBACFROBAMAluminum AlloyClear Anodize
ROBMCROBMCFROBMMS45CElectroless Nickel Plating
ROBSCROBSMSUS304

Crosspiece Groove Part
■New JIS (B1301) Keyway Dimensions
NominaldH7bJS9t Tolerance
N88+0.015
0
3±0.01251.4+0.1
0
N1010
NK10104±0.01501.8
N1212+0.018
0
N151552.3
N2020+0.021
0
62.8
N25258±0.01803.3+0.2
0
N3030
[!] For Crosspiece Groove Straight,
key length is shorter under the following conditions
in order to avoid causing interference with
through holes made by keyway machining
.

 When L/2 - X/2 ≤ K ≤ L/2 + X/2,
 K = L/2 - (X/2 + (b + 1)/2 + 1)
[ ! ]X ≥ Y
[!] For Crosspiece Groove Part Dimensions, see "Pulley, Idler Relief Dimensions".
[!] Set screws are not included.

Specification Table

■Crowned
Part NumberdLH
ROBAC30NK10L62H0.3
■Crosspiece Groove Straight
Part NumberdLXYZ
ROBAM4015L82X7.8Y6.0Z5.0
Part NumberdH71 mm IncrementsCrowned onlyCrosspiece Groove Straight only
: 0.1 mm Increments
Key LengthMF
Round HoleKeyway
TypeDStraight Bore + TapKeyway + TapLHXYZK+ Tap+ Tap
Crowned158N8Crowned 25M4M33.5
(No Flange)208N825 to 100 25
ROBAC10N10 · NK10  
ROBMC258N8  2526
ROBSC10N10 · NK10Crosspiece Groove Straight 
 308N850 to 100 7.0 to 15.05.0 to 12.04.0 to 7.02531
Crowned10N10 · NK10  
(Flanged)12N12  4.0 to 6.030
ROBACF3510N10 · NK10 0.34.0 to 7.02536
ROBMCF12N12  30
 15N15[!]When Keyway is selected for Crosspiece Groove Straight D = 60 or 800.5M4
Crosspiece Groove Straight4012N12 At D = 60 or 80 30M341
ROBAM15N15 When keyway is selected0.8M4
ROBMM20N2060 to 100  M5
ROBSM5015N15  30M5M4451
 20N20  M5
[!] Crosspiece Groove Straight is only available in D dimension 30 or larger.25N25  M5
 6020N20  30M6M54.561
 25N25  M6
 30N30  
 8025N25  30M8M6681
 30N30  
 35  
[!] K = L (No Flange) or K = L + 4 (Flanged) when L ≤ 36 (N8, N10, NK10) or L ≤ 43 (N12, N15, N20) or L ≤ 45 (N25, N30).
[!] Flanged Type is only applicable to D = 25 or more; Flanged Type with Keyways to D30 or more.
[!] Specify NK10 when Keyway + Tap with shaft bore dia. with keyway width 4.0 mm (height 1.8 mm) is desired.

Part Number 

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Part Number
ROBAC15-8-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC15-N8-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC20-[8,​10]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC20-N8-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC20-N10-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC20-NK10-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC25-[8,​10]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC25-N8-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC25-N10-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC25-NK10-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC30-[8,​10,​12]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC30-N8-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC30-N10-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC30-N12-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC30-NK10-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC35-[10,​12,​15]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC35-N10-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC35-N12-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC35-N15-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC35-NK10-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC40-[12,​15,​20]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC40-N12-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC40-N15-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC40-N20-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC50-[15,​20,​25]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC50-N15-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC50-N20-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC50-N25-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC60-[20,​25,​30]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC60-N20-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC60-N25-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC60-N30-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC80-[25,​30,​35]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC80-N25-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBAC80-N30-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF25-[8,​10]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF30-[8,​10,​12]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF30-N8-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF30-N10-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF30-N12-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF30-NK10-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF35-[10,​12,​15]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF35-N10-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF35-N12-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF35-N15-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF35-NK10-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF40-[12,​15,​20]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF40-N12-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF40-N15-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF40-N20-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF50-[15,​20,​25]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF50-N15-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF50-N20-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF50-N25-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF60-[20,​25,​30]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF60-N20-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF60-N25-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF60-N30-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF80-[25,​30,​35]-L[25-100/1]-H[0.3,​0.5,​0.8]
ROBACF80-N25-L[25-100/1]-H[0.3,​0.5,​0.8]
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipRoHSShape With or w/o Flange Outer Dia. D
(Ø)
Shaft (Bore) Dia. d
(mm)
Shaft Hole Specifications Keyway Width b
(mm)
H
(mm)
L
(mm)
X
(mm)
Y
(mm)
Z
(mm)

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange158Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange158New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange208 ~ 10Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange208New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange2010New JIS Keyway + Tap30.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange2010New JIS Keyway + Tap40.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange258 ~ 10Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange258New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange2510New JIS Keyway + Tap30.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange2510New JIS Keyway + Tap40.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange308 ~ 12Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange308New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange3010New JIS Keyway + Tap30.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange3012New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange3010New JIS Keyway + Tap40.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange3510 ~ 15Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange3510New JIS Keyway + Tap30.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange3512New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange3515New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange3510New JIS Keyway + Tap40.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange4012 ~ 20Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange4012New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange4015New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange4020New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange5015 ~ 25Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange5015New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange5020New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange5025New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange6020 ~ 30Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange6020New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange6025New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange6030New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange8025 ~ 35Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange8025New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedNo Flange8030New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange258 ~ 10Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange308 ~ 12Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange308New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange3010New JIS Keyway + Tap30.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange3012New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange3010New JIS Keyway + Tap40.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange3510 ~ 15Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange3510New JIS Keyway + Tap30.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange3512New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange3515New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange3510New JIS Keyway + Tap40.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange4012 ~ 20Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange4012New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange4015New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange4020New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange5015 ~ 25Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange5015New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange5020New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange5025New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange6020 ~ 30Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange6020New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange6025New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange6030New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange8025 ~ 35Round Hole + Tap-0.3 ~ 0.825 ~ 100---

-

1 Piece(s) 6 Day(s) or more 10CrownedFlange8025New JIS Keyway + Tap-0.3 ~ 0.825 ~ 100---

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Basic Information

Length L(mm) ~50 / ~100 Type Pulleys Material Aluminum Alloy
Shaft Type Round Hole Surface Urethane Urethane Not Provided Surface Treatment Clear Anodize

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