Round belt pulleys / V-groove, U-groove / grub screw clamping / steel, stainless steel, aluminium / black oxided, chemically nickel-plated, anodised

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MISUMI

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Back to the Category Round Belt Pulleys, Idlers

Technical Drawing - Round Belt Track Rollers

Pulleys for Round Belts/Setscrew:Related Image

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Available dimensions and tolerances can be found under the tab More Information.

Basic Properties (e.g., material, hardness, coating, tolerance) - Round Belt Track Rollers

Trapezoid Groove		U Groove		Material	Surface Treatment
Shape A	Shape B	Shape A	Shape B	Material	Surface Treatment
MBRDF	MBRD	MBRF	MBR	EN 1.1191 Equiv.	Black Oxide
MBRDFM	MBRDM	MBRFM	MBRM	EN 1.1191 Equiv.	Electroless Nickel Plating
-	MBRDS	-	MBRS	EN 1.4301 Equiv.	-
MBRDFA	MBRDA	MBRFA	MBRA	Aluminum Alloy 5000 series	Clear Anodize

Further specifications can be found under the tab More Information.

Composition of a Product Code - Round Belt Track Rollers

Part Number	-	Belt Radius	-	R	-	Shaft Bore Specification, I.D.
MBRDF30 MBR60	-	1.5	-	2	- -	H5 N12

Alterations - Round Belt Track Rollers

General Information - Round Belt Track Rollers

Round belt disk with hub - round belt disk with two grooves as idler pulley - plastic idler pulley - round belt disk with hub and double groove - round belt disk with clamping scar

Selection details of round belt discs/idler pulleys

- Material: aluminum, steel, stainless steel, resin type (polyacetal)

- Coatings: untreated, burnished, nickel-plated, anodized

- Groove shape: V-groove (trapezoid groove), U-groove

- Belt diameter: single groove, double groove

- Effective diameter: 2 to 10 mm

- Shaft diameter: 15 to 140 mm

- Mounting: 3 to 20 mm

Description/Basics

The round belt disk for mechanical engineering is generally intended for drive and power transmission.
A system with round belts and round belt disk can transmit force over larger distances. An idler pulley is recommended depending on the distance to the guide. This reduces oscillations in a belt drive and minimizes the risk of the belt jumping off the round belt pulley. In addition, the belt tension of a round belt is important for power transmission. Depending on the application, the tension can be produced via a round belt disk with integrated ball bearing (tension roller). In addition, the use of a tension roller can increase the wrap angle and thus the contact surface of the belt on the round belt disk. Round belt disks made of plastic are often used for tensioning the round belt.

In principle, MISUIM offers two types of round belt discs. These are available with a trapezoidal groove (V-groove) or radius (U-groove) suitable for the round belt. The V-groove round belt disks are adapted to the round belt and offer the advantage that they form up to three contact points for the round belt due to their shape. In comparison, round belt disks with a V-groove can thus have a higher slip torque.
MISUMI also offers round belt disks with two grooves for drives mounted side-by-side. The combination of two round belt disks can be absorbed with force and simultaneously released and forwarded. In pulleys for round belts with double grooves, the force can also be delivered in different directions or systems. Therefore, it may be possible to forgo a drive unit and reduce costs.
The drive wheels for round belts can be fastened on a axles / rotary shafts in various ways. A flat round belt disk is mounted on an axle using a clamping screw. MISUMI also offers this as a round belt disk with hub and optionally with keyways. Another commonly used variant is the belt pulley with clamping scar.
The belt pulleys for round belts can often be found in transport technology to convey light objects. These are usually operated in a permanent and constant transport.

If higher forces occur in a system and any slip is undesirable, a timing pulleys can be used.

Application Examples - Round Belt Track Rollers

Application example conveyor belt - round belts with two grooves - conveyor belts with round belts - round belt discs with axle

Application example conveyor belt
(1) Round belt disk with double groove, (2) rotary shaft, (3) Round belt, (4) Workpiece

Application example round belt conveyor belt - roller conveyor - conveyor belt with round belt - round belt wheel with round belt

Application example conveyor belt
(1) Round belt, (2) Motor, (3) Idler pulley/return roller, (4) Drive wheel for round belt

Application example roller conveyors - round belt discs with roller idlers - round belt discs with rollers - round belt discs with rollers - round belt discs with conveyor rollers

Application example roller conveyor
(1) Round belt disk, (2) Round belts, (3) Conveyor rollers

Application example round belt disk - round belt drive with bearing housing - round belt drive distribution

Application example
(1) Round belt disc with hub, (2) round belt, (3) rotary shaft, (4) bearing housing

Industrial Applications

3D printer industry

Automotive industry

Pharmaceutical industry

Packaging industry

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Part Number
MBRD15-1-H6.35
MBRD15-1-H[4-7/1]
MBRD15-1-P6.35
MBRD15-1-P[4-7/1]
MBRD18-2-H6.35
MBRD18-2-H[5-12/1]
MBRD18-2-N8
MBRD18-2-P6.35
MBRD18-2-P[5-12/1]
MBRD20-1-H6.35
MBRD20-1-H[4-12/1]
MBRD20-1-P6.35
MBRD20-1-P[4-12/1]
MBRD20-1.5-H6.35
MBRD20-1.5-H[4-12/1]
MBRD20-1.5-N[8,10]
MBRD20-1.5-P6.35
MBRD20-1.5-P[4-12/1]
MBRD23-2-H6.35
MBRD23-2-H[5-12/1]
MBRD23-2-N[8,10]
MBRD23-2-NK10
MBRD23-2-P6.35
MBRD23-2-P[5-12/1]
MBRD28-2-H6.35
MBRD28-2-H[5-12/1]
MBRD28-2-N[8,10]
MBRD28-2-NK10
MBRD28-2-P6.35
MBRD28-2-P[5-12/1]
MBRD28-2.5-H6.35
MBRD28-2.5-H[5-12/1]
MBRD28-2.5-N[8,10]
MBRD28-2.5-NK10
MBRD28-2.5-P6.35
MBRD28-2.5-P[5-12/1]
MBRD28-3-H6.35
MBRD28-3-H[5-12/1]
MBRD28-3-N[8,10]
MBRD28-3-NK10
MBRD28-3-P6.35
MBRD28-3-P[5-12/1]
MBRD30-1-H6.35
MBRD30-1-H[4-12/1]
MBRD30-1-N[8,10]
MBRD30-1-NK10
MBRD30-1-P6.35
MBRD30-1-P[4-12/1]
MBRD30-1.5-H6.35
MBRD30-1.5-H[5-12/1]
MBRD30-1.5-N[8,10]
MBRD30-1.5-NK10
MBRD30-1.5-P6.35
MBRD30-1.5-P[5-12/1]
MBRD30-2-H6.35
MBRD30-2-H[5-12/1]
MBRD30-2-N[8,10]
MBRD30-2-NK10
MBRD30-2-P6.35
MBRD30-2-P[5-12/1]

Standard Unit Price	Minimum order quantity	Standard Shipping Days ?	RoHS	Groove Shape	Applicable Belt Dia. (Ø)	Pitch Circle Dia. P.D. (Ø)	Pulley Type	Nominal Width W (mm)	Material	Surface Treatment	R (mm)	Belt Radius (mm)	NK	Shaft Bore Specifications (New JIS Keyway Hole + Tap) [N] (mm)	Shaft Bore Specifications (Old JIS Keyway Hole + Tap) [C] (mm)	Shaft Bore Specifications (Round Hole + Tap) [P] (mm)	Shaft Bore Specifications (Round Hole) [H] (mm)
-	1	10 Days	10	Trapezoid Groove	2	15	Shape B	2.2	EN 1.1191 Equiv.	Black Oxide	-	1	-	-	-	-	6.35
-	1	10 Days	10	Trapezoid Groove	2	15	Shape B	2.2	EN 1.1191 Equiv.	Black Oxide	-	1	-	-	-	-	4 ～ 7
-	1	10 Days	10	Trapezoid Groove	2	15	Shape B	2.2	EN 1.1191 Equiv.	Black Oxide	-	1	-	-	-	6.35	-
-	1	10 Days	10	Trapezoid Groove	2	15	Shape B	2.2	EN 1.1191 Equiv.	Black Oxide	-	1	-	-	-	4 ～ 7	-
-	1	10 Days	10	Trapezoid Groove	4	18	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	-	6.35
-	1	10 Days	10	Trapezoid Groove	4	18	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	-	5 ～ 12
-	1	10 Days	10	Trapezoid Groove	4	18	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	8	-	-	-
-	1	10 Days	10	Trapezoid Groove	4	18	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	6.35	-
-	1	10 Days	10	Trapezoid Groove	4	18	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	5 ～ 12	-
-	1	10 Days	10	Trapezoid Groove	2	20	Shape B	2.2	EN 1.1191 Equiv.	Black Oxide	-	1	-	-	-	-	6.35
-	1	10 Days	10	Trapezoid Groove	2	20	Shape B	2.2	EN 1.1191 Equiv.	Black Oxide	-	1	-	-	-	-	4 ～ 12
-	1	10 Days	10	Trapezoid Groove	2	20	Shape B	2.2	EN 1.1191 Equiv.	Black Oxide	-	1	-	-	-	6.35	-
-	1	10 Days	10	Trapezoid Groove	2	20	Shape B	2.2	EN 1.1191 Equiv.	Black Oxide	-	1	-	-	-	4 ～ 12	-
-	1	10 Days	10	Trapezoid Groove	3	20	Shape B	3.3	EN 1.1191 Equiv.	Black Oxide	-	1.5	-	-	-	-	6.35
-	1	10 Days	10	Trapezoid Groove	3	20	Shape B	3.3	EN 1.1191 Equiv.	Black Oxide	-	1.5	-	-	-	-	4 ～ 12
-	1	10 Days	10	Trapezoid Groove	3	20	Shape B	3.3	EN 1.1191 Equiv.	Black Oxide	-	1.5	-	8 ～ 10	-	-	-
-	1	10 Days	10	Trapezoid Groove	3	20	Shape B	3.3	EN 1.1191 Equiv.	Black Oxide	-	1.5	-	-	-	6.35	-
-	1	10 Days	10	Trapezoid Groove	3	20	Shape B	3.3	EN 1.1191 Equiv.	Black Oxide	-	1.5	-	-	-	4 ～ 12	-
-	1	10 Days	10	Trapezoid Groove	4	23	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	-	6.35
-	1	10 Days	10	Trapezoid Groove	4	23	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	-	5 ～ 12
-	1	10 Days	10	Trapezoid Groove	4	23	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	8 ～ 10	-	-	-
-	1	10 Days	10	Trapezoid Groove	4	23	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	10	-	-	-	-
-	1	10 Days	10	Trapezoid Groove	4	23	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	6.35	-
-	1	10 Days	10	Trapezoid Groove	4	23	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	5 ～ 12	-
-	1	10 Days	10	Trapezoid Groove	4	28	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	-	6.35
-	1	10 Days	10	Trapezoid Groove	4	28	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	-	5 ～ 12
-	1	10 Days	10	Trapezoid Groove	4	28	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	8 ～ 10	-	-	-
-	1	10 Days	10	Trapezoid Groove	4	28	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	10	-	-	-	-
-	1	10 Days	10	Trapezoid Groove	4	28	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	6.35	-
-	1	10 Days	10	Trapezoid Groove	4	28	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	5 ～ 12	-
-	1	10 Days	10	Trapezoid Groove	5	28	Shape B	5.5	EN 1.1191 Equiv.	Black Oxide	-	2.5	-	-	-	-	6.35
-	1	10 Days	10	Trapezoid Groove	5	28	Shape B	5.5	EN 1.1191 Equiv.	Black Oxide	-	2.5	-	-	-	-	5 ～ 12
-	1	10 Days	10	Trapezoid Groove	5	28	Shape B	5.5	EN 1.1191 Equiv.	Black Oxide	-	2.5	-	8 ～ 10	-	-	-
-	1	10 Days	10	Trapezoid Groove	5	28	Shape B	5.5	EN 1.1191 Equiv.	Black Oxide	-	2.5	10	-	-	-	-
-	1	10 Days	10	Trapezoid Groove	5	28	Shape B	5.5	EN 1.1191 Equiv.	Black Oxide	-	2.5	-	-	-	6.35	-
-	1	10 Days	10	Trapezoid Groove	5	28	Shape B	5.5	EN 1.1191 Equiv.	Black Oxide	-	2.5	-	-	-	5 ～ 12	-
-	1	10 Days	10	Trapezoid Groove	6	28	Shape B	6.6	EN 1.1191 Equiv.	Black Oxide	-	3	-	-	-	-	6.35
-	1	10 Days	10	Trapezoid Groove	6	28	Shape B	6.6	EN 1.1191 Equiv.	Black Oxide	-	3	-	-	-	-	5 ～ 12
-	1	10 Days	10	Trapezoid Groove	6	28	Shape B	6.6	EN 1.1191 Equiv.	Black Oxide	-	3	-	8 ～ 10	-	-	-
-	1	10 Days	10	Trapezoid Groove	6	28	Shape B	6.6	EN 1.1191 Equiv.	Black Oxide	-	3	10	-	-	-	-
-	1	10 Days	10	Trapezoid Groove	6	28	Shape B	6.6	EN 1.1191 Equiv.	Black Oxide	-	3	-	-	-	6.35	-
-	1	10 Days	10	Trapezoid Groove	6	28	Shape B	6.6	EN 1.1191 Equiv.	Black Oxide	-	3	-	-	-	5 ～ 12	-
-	1	10 Days	10	Trapezoid Groove	2	30	Shape B	2.2	EN 1.1191 Equiv.	Black Oxide	-	1	-	-	-	-	6.35
-	1	10 Days	10	Trapezoid Groove	2	30	Shape B	2.2	EN 1.1191 Equiv.	Black Oxide	-	1	-	-	-	-	4 ～ 12
-	1	10 Days	10	Trapezoid Groove	2	30	Shape B	2.2	EN 1.1191 Equiv.	Black Oxide	-	1	-	8 ～ 10	-	-	-
-	1	10 Days	10	Trapezoid Groove	2	30	Shape B	2.2	EN 1.1191 Equiv.	Black Oxide	-	1	10	-	-	-	-
-	1	10 Days	10	Trapezoid Groove	2	30	Shape B	2.2	EN 1.1191 Equiv.	Black Oxide	-	1	-	-	-	6.35	-
-	1	10 Days	10	Trapezoid Groove	2	30	Shape B	2.2	EN 1.1191 Equiv.	Black Oxide	-	1	-	-	-	4 ～ 12	-
-	1	10 Days	10	Trapezoid Groove	3	30	Shape B	3.3	EN 1.1191 Equiv.	Black Oxide	-	1.5	-	-	-	-	6.35
-	1	10 Days	10	Trapezoid Groove	3	30	Shape B	3.3	EN 1.1191 Equiv.	Black Oxide	-	1.5	-	-	-	-	5 ～ 12
-	1	10 Days	10	Trapezoid Groove	3	30	Shape B	3.3	EN 1.1191 Equiv.	Black Oxide	-	1.5	-	8 ～ 10	-	-	-
-	1	10 Days	10	Trapezoid Groove	3	30	Shape B	3.3	EN 1.1191 Equiv.	Black Oxide	-	1.5	10	-	-	-	-
-	1	10 Days	10	Trapezoid Groove	3	30	Shape B	3.3	EN 1.1191 Equiv.	Black Oxide	-	1.5	-	-	-	6.35	-
-	1	10 Days	10	Trapezoid Groove	3	30	Shape B	3.3	EN 1.1191 Equiv.	Black Oxide	-	1.5	-	-	-	5 ～ 12	-
-	1	10 Days	10	Trapezoid Groove	4	30	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	-	6.35
-	1	10 Days	10	Trapezoid Groove	4	30	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	-	5 ～ 12
-	1	10 Days	10	Trapezoid Groove	4	30	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	8 ～ 10	-	-	-
-	1	10 Days	10	Trapezoid Groove	4	30	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	10	-	-	-	-
-	1	10 Days	10	Trapezoid Groove	4	30	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	6.35	-
-	1	10 Days	10	Trapezoid Groove	4	30	Shape B	4.4	EN 1.1191 Equiv.	Black Oxide	-	2	-	-	-	5 ～ 12	-

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Back to the Category Round Belt Pulleys, Idlers

Technical Drawing - Round Belt Track Rollers

Open the technical drawing in the new window

Specification Tables - Round Belt Track Rollers

Part Number		Belt Radius	R	Shaft Bore Specification, I.D. Selection			D₁	D₂	h	W	T	L	ℓ	D	m	Applicable Belt Dia.	Unit Price
				1mm Increment		Selection											MBRDF MBRF	MBRDFM MBRFM	MBRDFA MBRFA	MBRD MBR	MBRDM MBRM	MBRDS MBRS	MBRDA MBRA
Type	P.D.	Trapezoid	U Groove	H, P(_H7)	N (New JIS)	C (Old JIS)
Trapezoid Groove A Shape MBRDF MBRDFM MBRDFA B Shape MBRD MBRDM MBRDS MBRDA U Groove A Shape MBRF MBRFM MBRFA B Shape MBR MBRM MBRS MBRA	*15	1		4~7	-	-	17	13	1	2.2	5	11	3	12	M3	2	-	-	-
	*20			4~12			22	18						16
	*30				8, 10, NK10		32	28						20
	*40						42	38
	20	1.5		4~12	8		22	17	1.5	3.3	10	16	3	16	M3	3
	30			5~12	8, 10, NK10		32	27						20
	40						42	37
	45			5~20	8~20 (8~15)	10	47	42				20	5	25	M4
	60						62	57
	18	2		5~12	(8)	-	20	14	2	4.4	10	16	3	16	M3	4
	23				8, 10, NK10		25	19						20
	28						30	24
	30						32	26
	40						42	36
	45			5~20	8~20 (8~15) NK10	10	47	41				20	5	25	M4
	48						50	44
	60						62	56
	80						82	76
	28	2.5		5~12	8, 10, NK10	-	30	23	2.5	5.5	10	16	3	20	M3	5
	40			5~20	8~20 (8~15) NK10	10	42	35				20	5	25	M4
	48						50	43
	50						52	45
	60						62	55
	75						77	70
	80						82	75
	28	3		5~12	8, 10, NK10	-	30	22	3	6.6	10	16	3	20	M3	6
	38						40	32				20	5		M4
	48			5~20	8~20 (8~15) NK10	10	50	42						25
	50						52	44
	58						60	52
	60						62	54
	75						77	69
	80						82	74
	95						97	89
	100						102	94
	50	4		5~20	8~20 NK10	10 12 15	52	42	4	8.8	12	24	6	30	M4 (M5) *1	8						-
	60						62	52														-
	80						82	72														-
	100						102	92														-
	120						122	112														-
	60	5		5~20	8~20 NK10	10 12 15	62	50	5	11	15	27	6	30	M4 (M5) *1	10						-
	80						82	70														-
	100						102	90														-
	120						122	110														-
	140						142	130														-

Shaft Hole Dia. 6.35 is available for Shaft Hole Specification H and P. Values in ( ) are for Shape B.
Shaft Hole Dia. 9 is not available for Shaft Hole Specification N.
Sizes with * will be B Shaps only. *1 When shaft diameter is 15mm or more, set screw size is (M5).
For keyway dimensions, see P.1377.
Specify NK10 when Keyway + Tap with shaft bore dia. 10 and keyway width 4.0mm (height 1.8mm) is desired.

Alterations - Round Belt Track Rollers

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Basic information

Pulleys/Idlers	Pulleys	Number of Grooves	1-fach	Product Type	Pulley (No Bearing)

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Basic Attributes

Applicable Belt Dia.(Ø)
2

3

4

5

6

8

10
Clear
Pitch Circle Dia. P.D.(Ø)
15

18

20

23

28

30

38

40

45

48

50

58

60

75

80

95

100

120

140
Clear
Pulley Type
- Shape A
- Shape B
Clear
Nominal Width W(mm)
2.2

3.3

4.4

5.5

6.6

8.8

11
Clear
Material
- EN 1.1191 Equiv.
- EN 1.4301 Equiv.
Clear
Surface Treatment
- Not Provided
- Black Oxide
- Electroless Nickel Plating
- Clear Anodized Aluminum
Clear
R(mm)
1

1.5

2

2.5

3

4

5
Clear
Belt Radius(mm)
- 1
- 1.5
- 2
- 2.5
- 3
- 4
- 5
Clear
NK
10
Clear
Shaft Bore Specifications (New JIS Keyway Hole + Tap) [N](mm)
8

10
[8-20/1mm Unit(s)]
Clear
Shaft Bore Specifications (Old JIS Keyway Hole + Tap) [C](mm)
10

12

15
Clear
Shaft Bore Specifications (Round Hole + Tap) [P](mm)
6.35
[4-20/1mm Unit(s)]
Clear
Shaft Bore Specifications (Round Hole) [H](mm)
6.35
[4-20/1mm Unit(s)]
Clear
Type
- MBR
- MBRA
- MBRD
- MBRDA
- MBRDF
- MBRDFA
- MBRDFM
- MBRDM
- MBRDS
- MBRF
- MBRFA
- MBRFM
- MBRM
- MBRS
Clear
Groove Shape
- Trapezoid Groove
- U Groove
Clear
Filter by CAD data type
- 2D
- 3D
Clear

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Optional Attributes

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

Frequently Asked Questions (FAQ)

Question:
What is the dimension of the keyway?: Answer:
The keyway of MISUMI round belt track rollers are manufactured according to the new JIS standard (B1301) or the previous JIS standard. Therefore, it is recommended to use a keyway from MISUMI, as these are matched. Dimensions are shown in the Keyway Overview PDF
Question:
How can round belts prevent the round belts from popping off?: Answer:
A round belt can jump or slip off the round belts by adjusting the correct belt tension. Depending on the application and the distance between the round belt track rollers, it requires an idler pulley. MISUMI also offers this for the appropriate belt diameters. These are already equipped with ball bearings and available in steel, stainless steel, aluminum and plastic.
Question:
Are round belt track rollers suitable for strong forces?: Answer:
If higher forces are transmitted, a round belt track roller with trapezoidal groove (V-groove) can be utilised. However, if very high forces are transmitted and slip is undesirable, a synchronous pulley and synchronous belt can be used. These can transmit higher forces without slipping.
Question:
How can an idler pulley be mounted?: Answer:
The idler pulley for the round belt comes already equipped with a ball bearing. Here, the bearing can be mounted on a clamping device with a cantilever pin. However, MISUMI also offers idler pulleys round belts with already pressed axle bolts. This can simplify assembly and reduce the assembly time.
Question:
Are there round belt track rollers made of aluminum?: Answer:
In addition, MISUMI offers in its product assortment round belt track rollers made of aluminum. These have good corrosion resistance and a low density. The round belt track rollers made of aluminum are well-suited for saving weight and generate a lower inertial mass during operation compared to other materials. In addition, the aluminum round belt track rollers are available with single or double groove, as well as V-groove (trapezoidal groove) and U-groove.