Why did the stainless steel guide shaft product rust?

The stainless steel material used for the guide shaft is SUS440C or an equivalent high-hardness corrosion-resistant steel. After quenching, it has good wear resistance, but the material itself has relatively weak corrosion resistance. Therefore, if you require a high level of rust prevention, please choose products with a hard chrome plated surface treatment.

The catalog lists guide shaft products as having high hardness, so why is the hardness measured at the center of the end face so low?

The guide shaft uses high-frequency quenching heat treatment, which forms a certain depth of hardened layer on the outer cylindrical surface of the guide shaft. To ensure the product's toughness, the center of the guide shaft retains the original hardness of the material.

What are the advantages of combining guide shafts with linear bearings?

The guide shaft, in combination with the linear bearing through rolling friction, enables high-precision linear motion without causing excessive frictional resistance to the workpiece, making it suitable for long-term continuous operation.

If you need a shaft product with a length of 100.5 mm, how do you select the model?

Additional machining by LKC is available; the total length can be specified in 0.1 mm increments.

Why do the ends of guide shafts with hard chrome plating rust?

The guide shaft undergoes surface treatment during raw material production, and is then cut to length. No additional surface treatment is performed after cutting, so the cut ends do not have a hard chrome plating, which may cause the ends to rust.

When the guide shaft and linear bearing are used together, some are closely matched, but some have relatively large clearance. Does it affect the use?

The guide shaft and linear bearing are in point contact and rolling fit through the circulating steel ball structure. Because of point contact and non-interference fit, it is normal to have clearance between the shaft and the bearing, which will not affect the use. The use of this structure greatly reduces the friction resistance and prolongs the service life of the workpiece.

Is MISUMI's stainless steel guide shaft material imported?

MISUMI guide shafts are made from bearing steel (SUJ2) and stainless steel (SUS440C), both of which are imported from Japan.

I would like to know the inspection methods and specification accuracy for the straightness of guide shafts.

Support both ends of the guide shaft with V-blocks, rotate the shaft one full turn at any point, and measure the dial gauge's runout. Half of the amplitude measurement is the straightness. Straightness may vary depending on the outer diameter and length.

What is the perpendicularity accuracy of the guide shaft?

The perpendicularity of the standard type guide shaft is 0.2, and the perpendicularity of the precision type is 0.03.

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Part Number CompleteĐã hoàn thành

E-PSFJ15-150

Material Heat Treatment Surface Treatment Shaft Dia. D Shaft Fit Tolerance type Length L CAD Days to Ship

Specification/DimensionsĐặc điểm kỹ thuật / Kích thướcĐặc điểm kỹ thuật / Kích thước

Material
- Steel
  - S45C
  - S45C or GCr15
- Stainless Steel
  - SUS440C or Equivalent
ClearTrống
Heat Treatment
- Not Provided
- Induction Hardened
ClearTrống
Surface Treatment
- Not Provided
- Hard Chrome Plating
ClearTrống
Shaft Dia. D(Ø)
3

4

5

6

8

10

12

13

15

16

20

25

30

35

40

50
ClearTrống
Shaft Fit Tolerance
f8

g7
ClearTrống
type
- E-PSFG
- E-PSFJ
- E-PSSFJ
- E-SFJ
- E-SSFJ
ClearTrống
Length L(mm)
[30-1200/1mm Unit(s)]
ClearTrống
CADCAD
- 2D
- 3D
ClearTrống

Days to ShipSố ngày giao hàng

Alltất cả các

5 Day(s) or Less

7 Day(s) or Less

9 Day(s) or Less

11 Day(s) or Less
ClearTrống

Specify AlterationsChỉ định thay đổi

Linear Shaft Straight Type (E-PSFJ15-150)

Name: Linear Shaft Straight Type
Brand: MISUMI
Availability: PreOrder

Check FAQ of this product (9 items)

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MISUMI

MiSUMi Economy

MISUMI

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Price :

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thận trọng

**RoHS Compliant is available for some part numbers.
Please contact with MISUMI for detail effective date.

Product Description

RoHS Compliant Product

Product Overview

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

Dimensional Drawing

Specification Overview

Type		Material	Hardness	Surface Treatment	D (mm)	L (mm)
D tolerance g7	D tolerance f8
E-SFJ	-	S45C or GCr15	High-frequency quenching Effective hardened layer depth>>See (PDF) S45C or GCr15 55HRC~ SUS440C or high-hardness corrosion-resistant steel 53HRC or more	-	3 to 50	10 to 1500
E-SSFJ	-	SUS440C or high-hardness corrosion-resistant steel
E-PSFJ	-	S45C or GCr15		Hard Chrome Plating Plating Hardness 750HV~ Plating Thickness 3µ or more
E-PSSFJ	-	SUS440C or high-hardness corrosion-resistant steel
-	E-PSFG	S45C Equivalent	-	Hard Chrome Plating Coating Hardness 750HV~ Coating 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.

Alterations

Code

Spec.

Change L Dimension Tolerance (Precision Grade)

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

Specification Method SC5

SC = specified unit 1 mm

SC + ℓ₁ ≤ L

SC = 0 or SC ≥ 1
Applicable Conditions Applicable for D ≥ 6

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
18	16
20	17
25	22
30	27	15
35	30	15
40	36	20
50	41	20

Add 2 wrench slots

WSC

Specified Method WSC12-X8

WSC, X = Specified unit 1 mm

WSC+X+ℓ₁ × 2<L

WSC(X)=0 or WSC(X) ≥ 1
Applicable Conditions D=6 or above is applicable

The machined surfaces are not guaranteed to be on the same horizontal plane.
Cannot be used together with SC·SX

1 additional surface machining

The designated reference point for FC varies depending on the product.
For details, please check each item.

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 18	1
20 to 40	2
50	3

2 additional flat surface machining locations

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 machined surfaces are not guaranteed to be on the same horizontal plane.
Cannot be used with FC

D	h
3 to 5	0.5
6 to 18	1
20 to 40	2
50	3

Add one 90-degree position flat machining

MISUMI Linear Guide Shaft with Retaining Ring Groove, Steering Shaft, Smooth Shaft, Chrome-Plated Rod

Specification Method RC10

RC = Specified unit 1 mm

RC+b₁ ≤ L

RC ≥ 2
Applicable Conditions D=10 to 30 applicable

Cannot be used together with WRC, not suitable for precision type

D	b1	h
10	6	0.5
12 to 20	6	1.0
25	10
30	12

Add machining of two additional 90-degree surfaces

WRC

Specified Method WRC10-Y10

WRC = Specified unit 1 mm

WRC + b₁ ≤ L

WRC(Y) ≥ 2
Applicable Conditions D = 10 to 30 applicable

Cannot be machined on the same plane,
Cannot be used with RC, precision type not applicable

D	b1	h
10	6	0.5
12 to 20	6	1.0
25	10
30	12

When multiple alteration is 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
3	-0.002 -0.012	-
4	-0.004 -0.016
5
6	-0.004 -0.016	-0.01 -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	-0.02 -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
Type	D	D tolerance g7
(D Tolerance g7) E-SFJ E-SSFJ E-PSFJ E-PSSFJ (D Tolerance f8) E-PSFG	3	10 to 400
	4	10 to 400
	5	10 to 400
	6	20 to 800
	8	20 to 1000
	10	20 to 1000
	12	20 to 1200
	13	25 to 1200
	15	25 to 1200
	16	30 to 1200
	20	30 to 1200
	25	35 to 1200
	30	35 to 1500
	35	35 to 1500
	40	50 to 1500
	50	65 to 1500

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

Outer diameters 3, 4, and 5 are not applicable to E-PSFG

Product Features

Feature 1: Has high-precision dimensional tolerances and is widely used in various precision equipment.
Feature 2: Uses bearing steel (S45C 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 bearing 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

(1) 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 portion of D part is hard chrome plated.
Guide Shafts Bushing MISUMI Quality Stainless Steel Material Imported from Japan

(2) 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 bearings.
(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 bearings, provides a guiding function.
For details, click

here

Linear bearing: 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 details, click

here

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

here

Application Industries

Medical	Semiconductor	Electronic & Electrical Appliances

Smart phone	Food	Automotive

Part Number

Incomplete part number.
Please use left hand selections to complete a part number.Incomplete part number.
Please use left hand selections to complete a part number.

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: 30; 45; 60

Part Number
E-PSFJ15-150

Part Number	Price	Minimum Order Qty.	Volume Discount	Days to ShipSố ngày giao hàng	Material	Heat Treatment	Surface Treatment	Shaft Dia. D (Ø)	Length L (mm)	Shaft Fit Tolerance
	-	1 Piece(s)		5 Day(s)	[Steel] S45C or GCr15	Induction Hardened	Hard Chrome Plating	15	150	g7

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Basic InformationThông tin cơ bản

Basic Shape	Solid	End Shape (Left)	No Machining	End Shape (Right)	No Machining
Shaft End Perpendicularity	Perpendicularity (0.2)

Linear bearing Standard type Straight type	Shaft support Bracket type	Shaft Collar Slit

Typical model: LMU8	Typical model: STHRB8	Typical model: SCS8-10

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Specification/DimensionsĐặc điểm kỹ thuật / Kích thướcĐặc điểm kỹ thuật / Kích thước

Material

Heat Treatment

Surface Treatment

Shaft Dia. D(Ø)

Shaft Fit Tolerance

type

Length L(mm)

CADCAD