Circular Rack, Pressure Angle 20°, Length Fixed

Brand :

MISUMI

Caution

Product Description

Product Overview

Rack is often used together with gears and is a type of mechanical component used for transmission. Allows rotational displacement to be transmitted linearly, and linear displacement to be transmitted rotationally.
Gear rack drive mechanisms can be used in elevators, rail systems, automotive steering systems, machine tools, and actuator feed mechanisms, among other fields.

Dimensional Drawing

● Dimensional Drawing

Metal: L size tolerance (mm)

Accuracy: Cumulative Pitch Error (Unit: µm)

Module	P Tolerance
0.5 to 2.0	-0.1 -0.3
2.5 to 3.0	-0.1 -0.4

Module	L tolerance
0.5 to 2.0	-0.2 to -0.6
2.5 to 3.0	-0.2 to -0.8

Module	Nominal model
Module	100	300	500	1000
0.5 to 1.5	54(76)	65(95)	72(101)	100(117)
2.0 to 3.0	62(86)	73(102)	80(112)	91(128)

( ) indicates the corresponding dimensions for E-RGMAS·E-RGMASL

Material Specifications

Type		Material	Surface Treatment
L dimension fixed type	L dimension configurable	Material	Surface Treatment
E-RGMA	E-RGMAL	Steel	Black Oxide Film
E-RGMAS	E-RGMASL	Stainless Steel	-

Please note that the cut surfaces and hole-processed surfaces are not surface treated.

If rust prevention is required, please prioritize stainless steel products. For details, please refer to Rust Prevention Performance and Maintenance of Metal Materials and Their Surface Treatments.

The fixed L size type is machined on both ends, while the specified L size type is machined on one end only. Please pay attention when selecting.

For the electronic catalog, please click here to obtain it.

Alteration

Alterations	Additional female thread machining on one end face	Additional female thread machining on both ends
Code	MC	WMC
Spec.

Specification Table

● Specification Table
●L dimension fixed type

Part Number			Effective Number of Teeth	Total length L	P (Pitch)	D (h9)	h
Type	Module	Nominal model
E-RGMA E-RGMAS	1.0	100	30	94.25	3.142	10	9
		300	95	298.45
		500	159	499.51
		1000	318	999.02
	1.5	100	21	98.96	4.712	15	13.5
		300	63	296.88
		500	106	499.51
		1000	212	999.02
	2.0	100	15	94.25	6.283	20	18
		300	47	295.31
		500	79	496.37
		1000	159	999.02
	2.5	100	12	94.25	7.854	25	22.5
		300	38	298.45
		500	63	494.8
		1000	127	997.4
	3.0	100	10	94.25	9.424	30	27
		300	31	292.17
		500	53	499.51
		1000	106	999.02

Both ends of this product series are machined. Please pay attention when selecting.

● L dimension configurable

Part Number		Overall length L can be specified down to 1 mm increments	P (Pitch)	D (h9)	h
Type	Module	Overall length L can be specified down to 1 mm increments	P (Pitch)	D (h9)	h
E-RGMAL E-RGMASL	1.0	20 to 980	3.142	10	9
	1.5		4.712	15	13.5
	2.0		6.283	20	18
	2.5		7.854	25	22.5
	3.0		9.424	30	27

This series of products is processed on one end only. Please pay attention when selecting.

Product Features

Feature 1: The round rack has a circular shape, suitable for certain special operating conditions
Feature 2: The circular design ensures accurate and smooth reciprocating motion of the rack
Feature 3: You can choose racks made of regular steel or stainless steel according to actual operating requirements.
Feature 4: The rack length can be specified according to your needs, and for easy installation, you can choose to add holes at both ends.

Usage Method

■ Linear Motion: Rack and Pinion Drive

Bracket Micro Gear Type Slide Table Assembly
Case 1: Linear Motion Using Gear and Rack Drive

Positioning Mechanism for Basic Frame
Case 2: Linear Motion Using Gear and Rack Drive

Precautions

■ Cutting Method for Rack End Face


Cut according to the length of the effective number of teeth (tooth root)	Cut from the reference surface to the specified length, excluding the teeth.

■ Rack Connection Method
The end face machining accuracy of MISUMI racks is less than the pitch.
Therefore, please leave a gap between the two racks as shown in the diagram below, and connect them after adjusting the pitch using a combination rack (racks with the same module).
Rack Connection Method Instructions

Example of Use

Case Study: Round Belt Conveyor for Transporting Lightweight Items

Equipment Name: Lifting Mechanism Using Circular Rack and Pinion

Feature 1: Uses multiple round racks meshing with gears for multiple linkages, enabling the lift to move up and down.
Feature 2: Use one cylinder to move multiple lifters up and down.
Feature 3: Enables lifting multiple workpieces at once.
Feature 4: Three round racks and gear assemblies can be mounted on the same part. When installing the gear, adjust the position to reduce backlash.

For more information, please click

Rack and Pinion Lifting Mechanism Example

Application Industries

Food	Semiconductor	Smart phone

Medical	Electronic & Electrical Appliances	Lithium battery

Economy Spur Gear Pressure Angle 20° Module 1.5	Economy Spur Gear Pressure Angle 20° Module 2.0	Economy Rack, High-Frequency Quenching / Square Cross-Section / Fixed L Size / Pressure Angle 20°
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