Linear Shafts One End Tapped

Brand :

MISUMI

Caution

Product Description

Product Overview

Linear guide shafts are high-precision shaft products that can be used with linear bushings and other bushing-type products. They not only offer excellent wear resistance, but also provide a variety of additional machining options.

Dimensional Drawing

Specification Overview

Type		Material	Hardness	Surface Treatment	D (mm)	L (mm)
Standard
D Tolerance g7	D Tolerance f8
E-SFJT	-	S45C or GCr15	High Frequency Quenched For effective hardening layer depth>>Refer to (PDF) S45C or GCr15 55HRC～ SUS440C or high hardness corrosion resistant steel 53HRC~	-	4~50	20~1500
E-SSFJT	-	SUS440C or High hardness corrosion resistant steel
E-PSFJT	-	S45C or GCr15		Hard Chrome Plated Plating hardness: 750HV～ Plating thickness: 3μ or more
E-PSSFJT	-	SUS440C or High hardness corrosion resistant steel
-	E-PSFGT	S45C Equivalent	-	Hard Chrome Plated Plating hardness: 750HV～ Plating thickness: 10μ or more

The shaft end processing section (effective thread length + approx. 10 mm) may experience reduced hardness due to the annealing effect of the processing.

If there are requirements for rust prevention, give priority to products with hard chrome plated surface treatment.

If used with linear bushings, please select products with high-frequency quenching.

O.D. 35, 40 and 50 are applicable only to E-PSFJT

O.D. 4 and 5 are not applicable to E-PSFGT

Alterations

Code

Spec.

Change L Dimension Tolerance (Precision Grade)
MISUMI Guide Shaft Product Introduction

LKC

Specification Method LKC
When using LKC, the unit for specifying L dimension can be 0.1 mm

L<200 →L±0.03
200 ≤ L<500 →L±0.05
L ≥ 500 →L±0.1

Add 1 wrench slot machining

MISUMI Guide Shaft Product Introduction

Specified Method SC5

SC = Specified unit 1 mm

SC+ℓ₁ < L

SC = 0 or SC ≥ 1
Applicable Conditions D = 6 or above applicable

Cannot be used together with WSC

D	W	ℓ₁
6	5	8
8	7
10	8
12	10	10
13	11
15	13
16	14

D	W	ℓ₁
20	17	10
25	22	10
30	27	15
35	30	15
40	36	20
50	41	20

1 additional surface machining
MISUMI Guide Shaft Product Introduction

Specification Method FC10-A8, FC10-E8

FC, A(E) = Specified unit 1 mm

D ≤ 30: FC ≤ 5 × D, D ≥ 35: FC ≥ 3 × D

When 1.5 × D<FC, FC ≤ L/2

A(E)=0 or A(E) ≥ 2

Cannot be used together with WFC

D	H
3 to 5	0.5
6 to 16	1
20 to 40	2
50	3

2 additional flat surface machining locations
MISUMI Guide Shaft Product Introduction

WFC

Specification Method WFC10-A8-E20

WFC, A, E = specified unit 1 mm

D ≤ 30: WFC ≤ 5 × D, D ≥ 35: WFC ≥ 3 × D

When 1.5 × D<WFC, 2WFC ≤ L/2

A(E)=0 or A(E) ≥ 2

The two machined planes are not guaranteed to be on the same level and cannot be used together with FC

D	H
3 to 5	0.5
6 to 16	1
20 to 40	2
50	3

When multiple alterations are selected, the machining parts need to be spaced by more than 2 mm. Click

here

Additional processing may cause a decrease in hardness. Please refer to Click

here

Precision Reference

■D Tolerance

D Tolerance
D	g7	f8
4	-0.004 -0.016	-
5
6	-0.004 -0.016	-0.010 -0.028
8	-0.005 -0.020	-0.013 -0.035
10
12	-0.006 -0.024	-0.016 -0.043
13
15
16
20	-0.007 -0.028	-0.020 -0.053
25
30
35	-0.009 -0.034	-0.025 -0.064
40
50

■ Tolerance of L size (Y size)

Dimensions (Greater Than)	Dimensions (To)	Shaft tolerance g7
2	6	±0.1
6	30	±0.2
30	120	±0.3
120	400	±0.5
400	1000	±0.8
1000	1500	±1.2

Specification Table

Part Number		L can be specified down to 1 mm increments	M (Coarse Thread) Selection
Type	D	Standard	M (Coarse Thread) Selection
Standard (D Tolerance g7) E-SFJT E-SSFJT E-PSFJT E-PSSFJT (D Tolerance f8) E-PSFGT	4	20 to 300	2
	5	20 to 400		2.6	3
	6	20 to 800			3
	8	20 to 1000			3	4	5
	10	20 to 1000			3	4	5	6
	12	20 to 1200				4	5	6	8
	13	25 to 1200				4	5	6	8
	15	25 to 1200				4	5	6	8	10
	16	30 to 1200				4	5	6	8	10
	20	30 to 1200				4	5	6	8	10	12
	25	35 to 1200				4	5	6	8	10	12	16
	30	35 to 1500						6	8	10	12	16	20
	35	35 to 1500							8	10	12	16	20	24	20
	40	50 to 1500								10	12	16	20	24	30
	50	65 to 1500								10	12	16	20	24	30

Outer diameters 35, 40, and 50 are only applicable to E-PSFJT

Outer diameters 4 and 5 are not applicable to E-PSFGT

Product Features

Feature 1: Has high dimensional accuracy and is widely used in various precision equipment.
Feature 2: Uses bearing steel (45 or GCr15) with excellent wear resistance and SUS440C or high-hardness corrosion-resistant steel, which are high-frequency quenched to enhance wear resistance while maintaining original toughness.
Feature 3: Various additional processing options are available to meet different usage environments.
Feature 4: Usually used in combination with linear bushings products, it provides excellent linear guiding performance. Compared to conventional shaft and bushing structures, even during high-speed reciprocating motion, there is minimal wear.
Feature 5: Optional hard chrome plating provides excellent rust resistance, and the coating hardness reaches HV750. It will not be easily worn when used with high-hardness workpieces.

Precautions

MISUMI High Precision Straight Guide Shaft - Selection Catalog

(2) Decreased hardness in the machined area
After quenching the base material, machining may cause some areas to lose hardness due to annealing:
- All external threads
- All steps
- Internal threads: When M ≥ D/2, double-hole internal thread type, hard chrome plated products made of SUS440C or high-hardness corrosion-resistant steel
- Additional processing for wrench slot (SC-WSC-SX)
- Additional processing for flat surface (FC-WFC)
- Additional processing for V-groove (VC-WVC)
- Except for full-length hardened type.

Only the shaded area of section D is hard chrome plated.
Guide Shaft Bushing, MISUMI Quality, Imported Japanese Stainless Steel Material

(3) Coating for Surface Treatment
After surface treatment of the base material, processing is performed. The following areas are not plated:
- Grooved section
-External thread section
-Internal thread section
-Wrench slot, V-groove, flat surface, cut surface
-The inside of the pipe-type guide shaft is not hard chrome plated and may rust.

Example of Use

Standard Linear Motion Mechanism
Example Image
MISUMI Guide Shafts Full Range of Selections

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

Actual Product Image

Direct-from-Manufacturer MISUMI Guide Shafts Larger Image

Function of Key Components in the Mechanism
Guide Shaft: Supports the workpiece and, when used with linear bushings, provides a guiding function. For details, click

here
Linear bushing: Uses a ball circulation structure to move the workpiece along the guide shaft. For details, click

here
Guide Shaft Support: Supports and secures the guide shaft, effectively adjusts shaft spacing, and enhances equipment stability. For more details, click

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

here

Application Industries

Medical	Semiconductor	Electronic & Electrical Appliances

Smart phone	Food	Automotive

Linear Bushing Standard type Straight type	Bearing with Housing T-Shaped	Shaft Collar Slit

Typical model: LMU8	Typical model: BGHK6000ZZ-30	Typical model: SCS8-10