Round Belt Pulley - Set Screw Type

MISUMI

Product Overview

Pulley for round belts is a rotating component that connects to the shaft using set screws. There are U grooves and non-slip trapezoidal grooves.
Widely used with round belts for conveying lightweight objects, angle transmission, and other applications.

Dimensional Drawing

Material Specifications

Trapezoidal Groove		U Groove		Material	Surface Treatment
Type A	Type B	Type A	Type B	Material	Surface Treatment
E-MBRDF	E-MBRD	E-MBRF	E-MBR	General structural steel or carbon steel	Black Oxide Film
E-MBRDFM	E-MBRDM	E-MBRFM	E-MBRM	General structural steel or carbon steel	Electroless Nickel Plating
-	E-MBRDS	-	E-MBRS	Stainless Steel	-
E-MBRDFA	E-MBRDA	E-MBRFA	E-MBRA	Aluminum	Clear Anodized

The trapezoidal groove prevents round belts from slipping.

Mounting screws not included.

If rust prevention is required, please give priority to products made of aluminum alloy, stainless steel, or those with electroless nickel plating surface treatment.
Please refer to

Anti-rust performance and maintenance of metal materials and surface treatment

Specification Table

Part Number		Belt Radius	R	Shaft Hole Specification·Inner Diameter Selection			D₁	D₂	h	W	T	L	ℓ	D	m	Applicable Belt Diameter
				Can be specified down to 1 mm increments		Selection
Type	P.D.	Trapezoidal	U Groove	H·P (_H7)	N (New JIS)	C (Old JIS)
Trapezoidal Groove Shape A E-MBRDF E-MBRDFM E-MBRDFA Shape B E-MBRD E-MBRDM E-MBRDS E-MBRDA U Groove Shape A E-MBRF E-MBRFM E-MBRFA Shape B E-MBR E-MBRM E-MBRS E-MBRA	*15	1		4 to 7	-	-	17	13	1	2.2	5	11	3	12	M3	2
	*20			4 to 12			22	18						16
	*30				8·10·NK10		32	28						20
	*40						42	38
	20	1.5		4 to 12	8		22	17	1.5	3.3	10	16	3	16	M3	3
	30			5 to 12	8·10·NK10		32	27						20
	40						42	37
	45			5 to 20	8 to 20 (8~15)	10	47	42				20	5	25	M4
	60						62	57
	18	2		5 to 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 to 20	8 to 20 (8 to 15) NK10	10	47	41				20	5	25	M4
	48						50	44
	60						62	56
	80						82	76
	28	2.5		5 to 12	8·10·NK10	-	30	23	2.5	5.5	10	16	3	20	M3	5
	40			5 to 20	8 to 20 (8 to 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 to 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 to 20 (8 to 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 to 20	8 to 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 to 20	8 to 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

When the shaft hole specification is H or P, a shaft hole diameter of 6.35 can also be selected.

( ) indicates B dimension.

Dimensions with * symbol are only provided for Shape B.

When selecting a new JIS keyway hole + threaded hole with a shaft hole diameter of 10 and a keyway width of 4 mm (height 1.8 mm), please specify NK10.

*1 When the shaft hole diameter is 15 or above, it is M5.

Product Features

Pulleys for round belts are available in fixed screw type, clamping type, and double type.
Set Screw Type Features: Shape A that connects to the shaft using a set screw. There are two types: U grooves and non-slip trapezoidal grooves.

Differences Between U-Shaped Grooves and Trapezoidal Grooves

Differences Between U-Shaped Grooves and Trapezoidal Grooves

The U-groove type has only one contact point with the pulley, while the trapezoidal groove has three contact points with the pulley, thus increasing the slip torque.

Clamping type feature: Simply tighten the screw to connect the shaft to the axis. No machining of the shaft is required.
Dual type features: Can be used when belts are installed in a staggered arrangement.

Example of Use

Round Belt Conveyor for Handling Lightweight Items

Equipment Name: Round Belt Conveyor

Feature 1: Uses round belts and pulleys, along with idler wheels, to transport thin sheets and other plate-shaped or lightweight items.
Feature 2: To prevent the round belt from bending, idler wheels are arranged at equal intervals.
Feature 3: Selects polyurethane round conveyor belts suitable for transporting lightweight items, with excellent wear and oil resistance.
Feature 4: The conveyor frame is composed of two aluminum frames and two processed parts.
Feature 5: Conveyor structure allows for both forward and reverse operation.
For more details, please click

Round Belt Conveyor Case

Application Industries

Food	Semiconductor	Smart phone

Medical	Electronic & Electrical Appliances	Lithium battery

High Torque Synchronous Timing Belt 2GT/3GT Type	Flat belt, with anti-running rib	Urethane round belt, welded joint product Free end product, hollow rope type

Representative Model: GBN2002GT-60	Typical model: HBLTDS350-4.23	Typical model: MBT5-150