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Free Roller Diameter 50 mm (Part Numbers)

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MISUMI

MiSUMi Economy

MISUMI

Part Number

Configured Part Number is shown.

Drawing/Specifications
Part Numbers

Product Overview

MISUMI economy free rollers do not have their own power source and mainly rely on conveyor belts or chains to rotate, serving to support the conveyor belt and guide product transport. They are an indispensable component of conveyor and drive systems.

Feature 1: Flexible installation, compact and lightweight; available with spring press-in, internal thread, and other installation methods to fit frames and conveyor lines. Small size, light weight, and low installation space requirements.
Feature 2: Various materials for a wide range of applications; available with carbon steel or stainless steel rollers, and can be coated with PU or PVC on the surface. You can choose different combinations based on the characteristics of the usage environment.
Feature 3: Simple structure and easy maintenance; mainly composed of the drum body, bearing housing, bearings, and main shaft, resulting in an extremely low failure rate and very convenient daily maintenance and replacement.

Dimensional Drawing

■Roller Diameter 50 mm Dimensional Drawing

Z1 (non-driven type) Internal thread:	HEX11 spring press-in type:	HEX11:

P1 P2 (multi-ribbed belt type) Internal thread:	HEX11 spring press-in type:	HEX11:

When the roller surface is covered with PVC, the roller diameter is 54 mm; when covered with PU, the roller diameter is 55 mm.

Material Specifications

■ Material Table

Type	Roller Material	Surface Treatment	Hardness	Coefficient of Friction μ
EA-FRJ	Carbon steel	Chromate gloss treatment	-	0.05
EA-FRJP		Covered with 2 mm PVC (gray)	Shore A63±5	0.4 to 0.6
EA-FRJU		2.5 mm PU sleeve (black anti-slip texture)	Shore A75±5	0.3 to 0.5
EA-FRN	SUS304	-	-	0.05
EA-FRNP		Covered with 2 mm PVC (gray)	Shore A63±5	0.4 to 0.6
EA-FRNU		2.5 mm PU sleeve (black anti-slip texture)	Shore A75±5	0.3 to 0.5

Specification Table

Place your order after selecting the model and parameters according to selection steps to

Type		Roller Diameter	-	Shaft	-	Effective Roller Length RL	-	Drive Head Type	-	Mounting Method
EA-FRJ		50	-	J1	-	350	-	P1	-	T0

■ Specification Table

Type	Roller Diameter (mm)	Shaft	Effective Roller Length RL (specify in 1 mm units)	Drive Head Type	Mounting Method
EA-FRJ* (Galvanized carbon steel) EA-FRJP* (Galvanized carbon steel with 2mm PVC coating) EA-FRJU* (Galvanized carbon steel with 2.5mm PU coating) EA-FRN （SUS304） EA-FRNP (SUS304 with 2mm PVC coating) EA-FRNU (SUS304 with 2.5mm PU coating)	50 (Tube wall thickness 1.5 mm)	J1 (Galvanized carbon steel shaft) C1 (SUS304 shaft)	350~1600	Z1 (No drive head) P1 (Plastic multi-ribbed belt head) P2 (Metal multi-ribbed belt head)	T0 (Diameter 12, M8 internal thread) T1 (HEX11 spring press-fit) T2 (HEX11)

*When the roller surface material is selected as EA-FRJ, EA-FRJP, or EA-FRJU galvanized carbon steel, there is no C1 stainless steel shaft option.

Installation Instructions

Internal thread: 1. This is the most commonly used installation method for powered conveyors such as sprocket rollers, using bolts at both ends to connect the roller and the frame into a single unit. 2. Installing and removing the roller takes relatively more time. 3. The mounting holes on the frame should not be too large to minimize the height difference of the roller after installation (The gap is generally set to 0.5 mm; for example, for M8, It is recommended that the frame hole diameter be ⌀8.5 mm);	Spring press-in type: 1. The most commonly used installation method for free rollers. Installation and removal are very convenient and quick. 2. There needs to be a certain installation clearance between the inner width of the frame and the roller, There will be differences depending on the diameter, hole size, and height. Typically, a gap of 0.5 to 1 mm is left on each side. 3. Additional tie rods should be installed between the frames to stabilize and reinforce the structure. 4. It is not recommended to use spring-press-in or other loose connection installation methods for sprocket rollers.	HEX11: 1. After both ends of the round shaft core are milled flat, they are snapped into the corresponding frame slots, Installation and removal are extremely simple. 2. Lacking upward constraint, it is mostly used as a belt conveyor idler. Not suitable for power transmission applications such as sprockets or poly-V belts.

Example of Use

Application Areas
Free rollers are widely used in fields such as warehousing and distribution, food packaging, automotive parts manufacturing, airport equipment, logistics sorting, and new energy. When paired with motorized rollers or belt conveyors, they provide material support and ensure smooth conveying operations.

Related Products

Economical driver specifications and types

Economy Motor Driven Roller Diameter 50 mm	Economy Motor Driven Roller Diameter 60 mm

EA-MORR-24-50-500-S5-C1-A0-Z1-T2-H3	EA-MORR-48-50-500-S7-D3-B0-P2-T1-K3

: 30; 60; 90

Part Number
EA-FRJ-50-J1-[350-1600/1]-P[1,2]-T[0,1,2]
EA-FRJ-50-J1-[350-1600/1]-Z1-T[0,1,2]
EA-FRJP-50-J1-[350-1600/1]-P[1,2]-T[0,1,2]
EA-FRJP-50-J1-[350-1600/1]-Z1-T[0,1,2]
EA-FRJU-50-J1-[350-1600/1]-P[1,2]-T[0,1,2]
EA-FRJU-50-J1-[350-1600/1]-Z1-T[0,1,2]
EA-FRN-50-C1-[350-1600/1]-P[1,2]-T[0,1,2]
EA-FRN-50-C1-[350-1600/1]-Z1-T[0,1,2]
EA-FRN-50-J1-[350-1600/1]-P[1,2]-T[0,1,2]
EA-FRN-50-J1-[350-1600/1]-Z1-T[0,1,2]
EA-FRNP-50-C1-[350-1600/1]-P[1,2]-T[0,1,2]
EA-FRNP-50-C1-[350-1600/1]-Z1-T[0,1,2]
EA-FRNP-50-J1-[350-1600/1]-P[1,2]-T[0,1,2]
EA-FRNP-50-J1-[350-1600/1]-Z1-T[0,1,2]
EA-FRNU-50-C1-[350-1600/1]-P[1,2]-T[0,1,2]
EA-FRNU-50-C1-[350-1600/1]-Z1-T[0,1,2]
EA-FRNU-50-J1-[350-1600/1]-P[1,2]-T[0,1,2]
EA-FRNU-50-J1-[350-1600/1]-Z1-T[0,1,2]

Standard Unit Price	Minimum order quantity	Days to Ship	Shaft Specifications	Roller Surface Material and Surface Finish	Effective Length (mm)	Drive Head Type	Installation Method
-	1 Piece(s)	12 Day(s) or more	Galvanized carbon steel shaft	Galvanized carbon steel	350 ～ 1600	P1 (Plastic multi-ribbed belt head) / P2 (Metal multi-ribbed belt head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	12 Day(s) or more	Galvanized carbon steel shaft	Galvanized carbon steel	350 ～ 1600	Z1 (No drive head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	14 Day(s) or more	Galvanized carbon steel shaft	Galvanized carbon steel with 2mm PVC	350 ～ 1600	P1 (Plastic multi-ribbed belt head) / P2 (Metal multi-ribbed belt head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	14 Day(s) or more	Galvanized carbon steel shaft	Galvanized carbon steel with 2mm PVC	350 ～ 1600	Z1 (No drive head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	19 Day(s) or more	Galvanized carbon steel shaft	Galvanized carbon steel with 2.5mm PU	350 ～ 1600	P1 (Plastic multi-ribbed belt head) / P2 (Metal multi-ribbed belt head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	19 Day(s) or more	Galvanized carbon steel shaft	Galvanized carbon steel with 2.5mm PU	350 ～ 1600	Z1 (No drive head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	12 Day(s) or more	SUS304 shaft	SUS304	350 ～ 1600	P1 (Plastic multi-ribbed belt head) / P2 (Metal multi-ribbed belt head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	12 Day(s) or more	SUS304 shaft	SUS304	350 ～ 1600	Z1 (No drive head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	12 Day(s) or more	Galvanized carbon steel shaft	SUS304	350 ～ 1600	P1 (Plastic multi-ribbed belt head) / P2 (Metal multi-ribbed belt head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	12 Day(s) or more	Galvanized carbon steel shaft	SUS304	350 ～ 1600	Z1 (No drive head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	14 Day(s) or more	SUS304 shaft	SUS304 with 2mm PVC	350 ～ 1600	P1 (Plastic multi-ribbed belt head) / P2 (Metal multi-ribbed belt head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	14 Day(s) or more	SUS304 shaft	SUS304 with 2mm PVC	350 ～ 1600	Z1 (No drive head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	14 Day(s) or more	Galvanized carbon steel shaft	SUS304 with 2mm PVC	350 ～ 1600	P1 (Plastic multi-ribbed belt head) / P2 (Metal multi-ribbed belt head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	14 Day(s) or more	Galvanized carbon steel shaft	SUS304 with 2mm PVC	350 ～ 1600	Z1 (No drive head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	19 Day(s) or more	SUS304 shaft	SUS304 with 2.5mm PU	350 ～ 1600	P1 (Plastic multi-ribbed belt head) / P2 (Metal multi-ribbed belt head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	19 Day(s) or more	SUS304 shaft	SUS304 with 2.5mm PU	350 ～ 1600	Z1 (No drive head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	19 Day(s) or more	Galvanized carbon steel shaft	SUS304 with 2.5mm PU	350 ～ 1600	P1 (Plastic multi-ribbed belt head) / P2 (Metal multi-ribbed belt head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)
-	1 Piece(s)	19 Day(s) or more	Galvanized carbon steel shaft	SUS304 with 2.5mm PU	350 ～ 1600	Z1 (No drive head)	T0 (HEX with M12*1 thread) / T1 (HEX11 spring press-in) / T2 (HEX11 without thread)

Basic Information

Roller Diamater(mm)	50

Configure

18 Part Numbers

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Configure Remaining Specifications

Completed

Specification/Dimensions

Shaft Specifications
SUS304 shaft

Galvanized carbon steel shaft
Clear
Roller Surface Material and Surface Finish
Galvanized carbon steel with 2mm PVC

Galvanized carbon steel with 2.5mm PU

SUS304

SUS304 with 2mm PVC

SUS304 with 2.5mm PU

Galvanized carbon steel
Clear
Effective Length(mm)
[350-1600/1mm Unit(s)]
Clear
Drive Head Type
P1 (Plastic multi-ribbed belt head)

Z1 (No drive head)

P2 (Metal multi-ribbed belt head)
Clear
Installation Method
T0 (HEX with M12*1 thread)

T1 (HEX11 spring press-in)

T2 (HEX11 without thread)
Clear

Days to Ship

All

12 Day(s) or Less

14 Day(s) or Less

19 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 .

Frequently asked question (FAQ)

Question: What causes abnormal noise during roller operation?: Answer: Abnormal noise can be caused by lack of lubrication in the bearings, contamination, misalignment, or loose components.
Question: How do you fix roller jamming after long-term use?: Answer: Remove debris and add lubricant. If the bearing is damaged, replace the component directly.
Question: Will extreme temperatures affect roller usage?: Answer: The recommended operating temperature range for rollers is -15°C; to 45°C
Question: What are the advantages of a rubber-coated roller compared to a standard roller?: Answer: It increases friction to prevent belt slippage, reduces noise and vibration, and also protects the surface of the conveyed materials.
Question: Can the rubber-coated surface be wiped with alcohol?: Answer: Yes, after applying a small amount of alcohol, wipe it dry promptly or let it air dry. Do not use any other highly corrosive chemicals, even in small amounts.