Tube Guide Shafts, Both End Threaded with Wrench Flats

Brand :

MISUMI

Caution

Product Description

Product Overview

The linear guide shaft is a high-precision shaft product that can be used in conjunction with linear bearings and other bushing-type products, offering excellent wear resistance.
The hollow section of the tube shaft can be used for wiring. It is a lightweight linear guide shaft.

Dimensional Drawing

Introduction to Misumi linear guide shaft (straight type) products

Linear shaft, straight rod type, linear bearing matching components

■ Material specifications

TYPE		D tolerance	Equivalent material	Hardness	Surface treatment
Internal thread type on both ends	Internal thread type on both ends With wrench slot type
E-PSPJW	E-PSPWR	g7	GB: 45 JIS: S45C	High-frequency quenching 55HRC~ For effective hardened layer depth, please click Surface Hardness Reference	Hard chrome plating Plating hardness HV750~ Plating thickness 3µ or more

The tube shaft end face and inner bore are not surface treated, so rust may occur.

When measuring hardness, due to structural reasons, using a Rockwell hardness tester (HRC) for small diameter specifications may result in significant errors. It is recommended to use a Vickers hardness tester (HV) for testing.

Specification Table

■ Size specifications

Type			L Specified unit: 1 mm	M (coarse thread) · N (coarse thread) Selection		Wrench slot size			d	C
TYPE	D	Outer diameter g7	L Specified unit: 1 mm	M (coarse thread) · N (coarse thread) Selection		SC	W	ℓ1	d	C
Internal thread on both ends type E-PSPJW Internal thread on both ends type With wrench slot type E-PSPWR	6	-0.004 -0.016	20–600	3		SC = specified unit 1 mm When D ≤ 25 SC + ℓ1 ≤ L – N × 2 SC ≥ M × 2 When D ≥ 30 SC + ℓ1 ≤ L SC ≥ 0	5	8	2	0.5 or less
	8	-0.005 -0.020	20–800	4	5		7		3
	10	-0.005 -0.020	20–800	5	6		8		4
	12	-0.006 -0.024	20–1000		8		10	10	6
	13		25–1000		10		11		7
	16		30–1200		12		14		10
	20	-0.007 -0.028	30–1200		16		17		14	1.0 or less
	25		35–1200		20		22		15
	30		35–1500		20		27	15	18

MISUMI linear guide shaft straight rod type, steering shaft, linear shaft, chrome-plated rod

■ Additional machining

MISUMI linear guide shaft straight rod type, full model machining

Accuracy Reference

■ Roundness, straightness, and L dimension accuracy
Linear shaft straight rod type machining selection catalog, FA factory automation parts dimension drawing

Linear shaft straight rod type machining selection catalog, FA factory automation parts dimension drawing

■ Roundness of section D

Shaft diameter (greater than)	Shaft diameter (up to)	Shaft tolerance g6	Shaft tolerance g7 (economy type)
6	10	0.004	0.012
10	13	0.004	0.012
13	16	0.005	0.016
16	20	0.005	0.016
20	30	0.006	0.020

■ Method for measuring straightness
Custom selection of Misumi rotary shaft straight rod type, all Misumi models

■ Straightness

Shaft diameter	Overall length	Shaft tolerance g6	Shaft tolerance g7 (economy type)
6–30	≤ 100	Less than 0.01	Less than 0.025
6–30	> 100	(L/100) × less than 0.01	(L/100) × less than 0.025

■ Tolerance of L dimension (Y dimension)

Dimension (greater than)	Dimension (up to)	Shaft tolerance g6	Shaft tolerance g6 (economy type)
6	30	±0.2
30	120	±0.3
120	400	±0.5
400	1000	±0.8
1000	1500	±1.2

■ Coaxiality, perpendicularity
Professional sales of precision guide shafts, straight rod type, linear shafts, rotary shafts, and chrome-plated rods

Professional sales of precision guide shafts, straight rod type, linear shafts, rotary shafts, and chrome-plated rods

Product Features

Feature 1: The product is lightweight, with the tube shaft weighing 35% less than a solid shaft.
Feature 2: The hollow section inside the tube can be used for wiring, allowing for customized routing and reducing the space occupied by cables inside the equipment.
Feature 3: It has high-precision dimensional and geometric tolerances, making it widely used in various precision equipment.
Feature 4: Made from carbon steel (S45C) and treated with high-frequency quenching, it enhances wear resistance while maintaining original toughness.
Feature 5: Various additional processing options are available to meet different usage environments.
Feature 6: Typically used in combination with linear bearing products, offering excellent linear guidance. Compared to standard shaft and bushing structures, even during high-speed reciprocating motion, there is minimal wear.
Feature 7: Optional hard chrome plating surface treatment provides excellent rust resistance, with a coating hardness reaching HV750. When used with high-hardness workpieces, it is not easily worn.
Feature 8: Compared to standard guide shaft products, the price is significantly lower.

Usage Method

Usage example	Medium precision - tube type	Medium precision	High precision
	Economy type g7	Economy type g7	g6 Standard Type / g6 Precision Type

Recommended Applications	- Medium precision applications - Light load - Suitable for situations where wiring needs to be hidden inside the tube - Cost-effective design	- Medium precision applications - Light load - Used vertically and suitable for light loads - Shorter travel distance, lower frequency, and lower speed - Cost-effective design	- For high-precision applications (outer diameter, straightness, roundness) - For heavy load and high durability applications - Suitable for use in the horizontal direction and for heavy loads - Greater sliding distance, frequency, and speed

Precautions

Standard linear guide shaft, one end stepped, both ends with internal threads and wrench slots, Japanese quality, steering shaft specification selection products

(1) Surface hardness confirmation
For quenched guide shafts, the standard for the depth of the hardened layer varies depending on the outer diameter and tolerance.
Please refer to the table below for details:

Outer diameter (D)	Effective hardened layer depth
	Shaft tolerance g7 (economy type)	Shaft tolerance g6
	GB: Equivalent to 45 JIS: Equivalent to S45C	GB: Equivalent to GCr15 JIS: Equivalent to SUJ2	GB: Equivalent to 9Cr18 JIS: Equivalent to SUS440C

6–10	0.3 or above	0.5 or above	0.5 or above
12, 13	0.5 or above	0.7 or above	0.5 or above
16–20			0.7 or above
25–30	0.8 or higher	1.0 or higher

(2) Reduced hardness in machined areas
After quenching the base material, machining may cause reduced hardness due to annealing in the following areas:
- All external threads
-All steps
-Internal threads: when M ≥ D/2, double-hole type internal threads, hard chrome-plated SUS440C products
-Additional machining of wrench slots (SC-WSC-SX)
-Additional machining of flat surfaces (FC-WFC)
-Additional machining of V-grooves (VC-WVC)
-Except for fully hardened types.

Only the shaded area in section D is hard chrome plated.
Guide shaft with stepped end, internal threads on both ends, wrench slot bushing, MISUMI quality, Japanese imported stainless steel material

Guide shaft with stepped end, internal threads on both ends, wrench slot bushing, MISUMI quality, Japanese imported stainless steel material

(3) Plating after surface treatment
After surface treatment of the base material, machining is performed, and the following areas are not plated:
- Groove areas
-External thread sections
-Internal thread sections
-Wrench slots, V-grooves, flat surfaces, and cut surfaces
-The inside of pipe-type guide shafts is not hard chrome plated and may rust.

Example of Use

Comprehensive selection guide for Misumi linear guide shafts (straight type)

Functions of Standard Linear Motion Mechanisms
(1) Using two guide shafts in parallel effectively prevents the workpiece from rotating.
(2) Improves the accuracy of linear motion and load-bearing capacity.
(3) High-speed reciprocating motion can be achieved through the combination of guide shafts and linear bearings.
(4) Low running resistance, resulting in less wear on the corresponding workpiece.

Factory-direct large images of Misumi linear guide shaft (straight type) products

Functions of Key Components in the Mechanism
"Linear guide shaft: Supports the workpiece and, when used with linear bearings, provides guiding functionality.
For details, click

Linear Guide Shaft

Linear bearing: Uses a ball circulation structure to drive the workpiece along the guide shaft.
For details, click

Linear Bearing

Guide shaft support: Supports and secures the guide shaft, effectively adjusts the shaft spacing, and improves the stability of the equipment.
For details, click

Guide Shaft Support

Stopper: Serves as a limit, used to adjust the effective stroke of the mechanism.
For more details, click

Stopper

Application Industries

Medical	Semiconductors	Electronics and Electrical Appliances

Smartphones	Food	Automotive

Linear Bearing Standard Type, Straight Cylinder Type	Bearing Housing Assembly T Type	Retaining Ring Open Type

Representative Model: LMU6	Representative Model: BGHFS6000ZZ-30	Representative Model: PSCS10-10
Advantages: High quality, low price, short lead time	Advantages: Complete range, high precision, high quality	Advantages: Supporting shaft products, complete range