Why are stainless steel guide shafts rusting?

Guide shafts are made of SUS440C, which are quenched for better abrasion resistance, but the material itself is weak to corrosion. Therefore, please select hard chrome plated products for applications with higher anti-rust requirements.

Why is the hardness measured on the end face center is rather low in contrast with high hardness indicated for guide shaft products in the catalog?

As the guide shaft is high-frequency quenched, a hardening layer of certain depth will form on the outer circle of the guide shaft. To ensure toughness, the material will retain original hardness at the center of the guide shaft.

What are the advantages of combining guide shaft with linear bushing?

Due to rolling friction fit with the linear bushing, the guide shaft can achieve high-accuracy linear motion, causing less friction resistance to the workpiece, thus suitable for extended continuous operation.

How to select models of shaft products requiring a length of 100.5mm?

The total length can be customized in 0.1mm increments with LKC alteration.

Why is the end face of hard chrome plated guide shaft rusting?

The guide shaft is cut after surface treatment during material preparation. Thereafter, no surface treatment will be performed, so the cut surface is not hard-chrome plated, thus causing the end face to rust.

When combined with linear bushing, some guide shafts fit closely, while others fit with clearance. Does it affect usage?

The guide shaft and linear bushing fit with each other by point-contact rolling through the steel ball circulating structure. Due to the point-contact and non-interference fit, some clearance between the shaft and the bushing is normal, which will not affect usage. The use of this structure greatly reduces frictional resistance and improves service life of the workpiece.

Is the stainless steel material of MISUMI guide shafts imported?

Both the bearing steel (SUJ2) and stainless steel (SUS440C) of MISUMI guide shafts are materials imported from Japan.

How much is the perpendicularity accuracy of guide shaft?

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

Notice of End of Sales for Economy Series Pneumatic Equipment Category. More information.

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Part Number Complete

E-PSFJC6-[20-600/1]-M3-SC[0-592/1]

Shaft Dia. D Length L Tapped M (Coarse Thread) SC type CAD Days to Ship

Specification/Dimensions

Shaft Dia. D(Ø)
6

8

10

12

13

15

16

20

25

30

35

40

50
Clear
Length L(mm)
[20-1500/1mm Unit(s)]
Clear
Tapped M (Coarse Thread)(mm)
3

4

5

6

8

10

12

16

20

24

30
Clear
SC(mm)
[0-1485/1mm Unit(s)]
Clear
type
- E-PSFJC
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

12 Day(s) or Less
Clear

Specify Alterations

Guide Shafts One End Tapped with Wrench Slot

Name: Guide Shafts One End Tapped with Wrench Slot
Brand: MISUMI
Availability: PreOrder

Check FAQ of this product (9 items)

Brand :

MISUMI

MiSUMi Economy

MISUMI

Part Number :

E-PSFJC6-[20-600/1]-M3-SC[0-592/1]

E-PSFJC8-[20-800/1]-M[3,4,5]-SC[0-792/1]

E-PSFJC10-[20-800/1]-M[3,4,5,6]-SC[0-490/1]

E-PSFJC12-[20-1000/1]-M[4,5,6,8]-SC[0-990/1]

E-PSFJC13-[25-1000/1]-M[4,5,6,8]-SC[0-990/1]

E-PSFJC15-[30-1200/1]-M[4,5,6,8,10]-SC[0-1190/1]

E-PSFJC16-[30-1200/1]-M[4,5,6,8,10]-SC[0-1190/1]

E-PSFJC20-[30-1200/1]-M[4,5,6,8,10,12]-SC[0-1190/1]

E-PSFJC25-[35-1200/1]-M[4,5,6,8,10,12,16]-SC[0-1180/1]

E-PSFJC30-[35-1500/1]-M[6,8,10,12,16,20]-SC[0-1485/1]

E-PSFJC35-[35-1500/1]-M[8,10,12,16,20,24]-SC[0-1485/1]

E-PSFJC40-[40-1500/1]-M[10,12,16,20,24,30]-SC[0-1485/1]

E-PSFJC50-[50-1500/1]-M[12,16,20,24,30]-SC[0-1485/1]

E-PSFJC6-[20-600/1]-M3-SC[0-592/1]

Order Qty :
Price :

---
Total Price :

---
Days to ship :

---

Select part number to Order Now/ Add to Cart

CAD Download

Dimensional Drawing

MISUMI Linear Guide Shafts One End Tapped Rotary Shaft Hollow Shaft Chrome Plated Bar

Specification Table

■Material Specification

D Tolerance	Equivalent Material	Hardness		Surface Treatment
g7	GB：45 JIS：S45C	55HRC～	High Frequency Quenched For effective hardening layer depth, click Surface Hardness Benchmark	Hard Chrome Plated Plating hardness: HV750～ Plating thickness: 3μ or more

The hardness of shaft end machined part may be reduced due to the annealing effect of machining.

If there are requirements for rust prevention, please give priority to the hard-chrome plated products. Click

Rust Prevention Method

For combination with linear bushing, please select high-frequency quenched products.

■ Dimension Specification

Shaft Dia. D (φ)	Tolerance g7	Length L 1mm increments	Nominal Thread M (Coarse Thread)									Wrench slot size			C
Shaft Dia. D (φ)	Tolerance g7	Length L 1mm increments	Nominal Thread M (Coarse Thread)									SC	W	ℓ₁	C
6	-0.004 -0.016	20～ 600	3									SC ＝ 1mm increments SC+ℓ1 ≤L SC≥0	5	8	Below 0.5
8	-0.005 -0.020	20～ 800	3	4	5								7
10	-0.005 -0.020	20～ 800	3	4	5	6							8
12	-0.006 -0.024	20~1000		4	5	6	8						10	10
13		25~1000		4	5	6	8						11
16		30~1200		4	5	6	8	10					14
20	-0.007 -0.028	30~1200		4	5	6	8	10	12				17		Below 1.0
25		35~1200		4	5	6	8	10	12	16			22
30		35~1500				6	8	10	12	16	20		27	15

Hollow Shafts Straight Type Machining Selection Catalog FA Factory Automation Parts Dimensional Drawing

Precision Benchmark

■Roundness·Straightness·L Dimensional Precision
Hollow Shafts Straight Type Machining Selection Catalog FA Factory Automation Parts Dimensional Drawing

■Straightness Measurement Method
MISUMI Rotary Shafts Straight Type Custom Selection Full Range of misumi Models

Support both ends of the guide shaft with V-shaped blocks,
rotate the shaft for 1 turn at any point,
and measure the amplitude of the dial meter.
1/2 of the amplitude measurement value is the straightness.

■Roundness of Part D

Shaft Dia. (more than)	Shaft Dia. (to)	Standard product g6	Economy series g7	Medium precision h8
2	5	0.004	－	－
5	10	0.004	0.012	0.012
10	13	0.004	0.012	0.012
13	18	0.005	0.016	0.016
18	20	0.005	0.016	0.016
20	40	0.006	0.020	0.020
40	50	0.007	－	－

■Straightness

Shaft Dia.	Total Length	Standard product g6	Economy series g7	Medium precision h8
3·4	≤100	(L/100)×0.05 or Less	－	－
3·4	＞100	(L/100)×0.05 or Less
5	≤100	(L/100)×0.03 or Less
5	＞100	(L/100)×0.03 or Less
6~50	≤100	Below 0.01	Below 0.025	Below 0.025
6~50	＞100	(L/100)×0.01 or Less	(L/100)×0.025 or Less	(L/100)×0.025 or Less

■L dimension tolerance

Dimension (more than)	Dimension (to)	Standard product g6	Economy series g7	Medium precision h8
2	6	±0.1
6	30	±0.2
30	120	±0.3
120	400	±0.5
400	1000	±0.8
1000	1500	±1.2

■Perpendicularity
Professional Sales of Precision Guide Shafts Straight Type Hollow Shaft Rotary Shaft Chrome Plated Bar

Part Number

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

: 30; 45; 60

Part Number
E-PSFJC6-[20-600/1]-M3-SC[0-592/1]
E-PSFJC8-[20-800/1]-M[3,4,5]-SC[0-792/1]
E-PSFJC10-[20-800/1]-M[3,4,5,6]-SC[0-490/1]
E-PSFJC12-[20-1000/1]-M[4,5,6,8]-SC[0-990/1]
E-PSFJC13-[25-1000/1]-M[4,5,6,8]-SC[0-990/1]
E-PSFJC15-[30-1200/1]-M[4,5,6,8,10]-SC[0-1190/1]
E-PSFJC16-[30-1200/1]-M[4,5,6,8,10]-SC[0-1190/1]
E-PSFJC20-[30-1200/1]-M[4,5,6,8,10,12]-SC[0-1190/1]
E-PSFJC25-[35-1200/1]-M[4,5,6,8,10,12,16]-SC[0-1180/1]
E-PSFJC30-[35-1500/1]-M[6,8,10,12,16,20]-SC[0-1485/1]
E-PSFJC35-[35-1500/1]-M[8,10,12,16,20,24]-SC[0-1485/1]
E-PSFJC40-[40-1500/1]-M[10,12,16,20,24,30]-SC[0-1485/1]
E-PSFJC50-[50-1500/1]-M[12,16,20,24,30]-SC[0-1485/1]

Price	Minimum Order Qty.	Days to Ship	RoHS	Shaft Dia. D (Ø)	Length L (mm)	Tapped M (Coarse Thread) (mm)	SC (mm)
-	2 Piece(s)	12 Day(s)	10	6	20 ～ 600	3	0 ～ 592
-	2 Piece(s)	12 Day(s)	10	8	20 ～ 800	3 ～ 5	0 ～ 792
-	2 Piece(s)	12 Day(s)	10	10	20 ～ 800	3 ～ 6	0 ～ 490
-	2 Piece(s)	12 Day(s)	10	12	20 ～ 1000	4 ～ 8	0 ～ 990
-	2 Piece(s)	12 Day(s)	10	13	25 ～ 1000	4 ～ 8	0 ～ 990
-	2 Piece(s)	12 Day(s)	10	15	30 ～ 1200	4 ～ 10	0 ～ 1190
-	2 Piece(s)	12 Day(s)	10	16	30 ～ 1200	4 ～ 10	0 ～ 1190
-	2 Piece(s)	12 Day(s)	10	20	30 ～ 1200	4 ～ 12	0 ～ 1190
-	2 Piece(s)	12 Day(s)	10	25	35 ～ 1200	4 ～ 16	0 ～ 1180
-	2 Piece(s)	12 Day(s)	10	30	35 ～ 1500	6 ～ 20	0 ～ 1485
-	2 Piece(s)	12 Day(s)	10	35	35 ～ 1500	8 ～ 24	0 ～ 1485
-	2 Piece(s)	12 Day(s)	10	40	40 ～ 1500	10 ～ 30	0 ～ 1485
-	2 Piece(s)	12 Day(s)	10	50	50 ～ 1500	12 ～ 30	0 ～ 1485

Product Overview

Linear guide shaft is a high precision shaft product, which can be used in combination with linear bushing and other bushing products. In addition to excellent abrasion resistance, it offers a variety of alterations.

Product Features

Feature 1: Extensively applied in various precision equipment thanks to high precision dimensional tolerance and geometric tolerance.
Feature 2: High-frequency quenched using carbon steel (S45C) material, maintaining the original toughness while enhancing abrasion resistance.
Feature 3: A variety of alterations are available to accommodate different environments.
Feature 4: Usually combined with linear bushing products, achieving excellent linear guiding functionality, and less abrasion even if subject to high-speed reciprocal motion, as compared with general shaft and bushing structure.
Feature 5: The surface treatment of hard-chrome plating is available, achieving excellent anti-rust performance and HV750 plating hardness, as well as less abrasion when used in combination with high-hardness workpieces.
Feature 6: Greatly reduced prices in comparison with standard guide shafts.

Specifications Overview

D Tolerance	Equivalent Material	Hardness		Surface Treatment	D (mm)	L (mm)
g7	GB：45 JIS：S45C	55HRC～	High Frequency Quenched For effective hardening layer depth, click Surface Hardness Benchmark	Hard Chrome Plated Plating hardness: HV750～ Plating thickness: 3μ or more	6~30	20~1500

The hardness of shaft end machined part (effective thread length + approx. 10mm) may be reduced due to the annealing effect of machining.

If there are requirements for rust prevention, please give priority to the hard-chrome plated products. Click

Rust Prevention Method

For combination with linear bushing, please select high-frequency quenched products.

Usage Method

Example of Use	Medium Precision	High Precision
	Economy series g7	g6 standard type/g6 precision type

Recommended Applications	- Medium precision application - Light load - Use in vertical direction and suitable for light load - Short sliding distance - Low frequency - Low speed - Low-price design	- High precision application (Outer diameter-Straightness-Roundness) - Heavy load - High-durability application - Use in horizontal direction and suitable for heavy load - Long sliding distance - High frequency - High speed

Example of Use

Standard Linear Motion Mechanism
Example Diagram
MISUMI Guide Shafts One End Tapped Full Range of Selections

Functions of standard linear motion mechanism
①Side-by-side use of two guide shafts effectively prevents workpiece rotation
②Improved accuracy of linear motion and load capacity.
③The combination of guide shaft and linear bushing enables high-speed reciprocal motion.
④Low operational resistance, reducing the loss of workpiece.

Product Picture
Direct-from-Manufacturer MISUMI Guide Shafts One End Tapped Larger Image

Functions of key workpieces in the mechanism
Linear guide shaft: Supporting the workpiece, combining with linear bushing to achieve guiding functionality.
For details, click

Linear Guide Shafts

Linear bushing: Driving the workpiece to move on the guide shaft through the steel ball circulating structure.
For details, click

Linear Bushings

Guide shaft support: Supporting and fixing the guide shaft for effective adjustment of shaft pitch and improved equipment stability.
For details, click

Guide Shaft Posts

Stopper: Performing limit action for adjustment of effective stroke of mechanism
For details, click

Stoppers

Precautions

View of Shaft Cut Section
Standard Type Guide Shafts One End Tapped Japanese Quality Rotary Shaft Specification Selection Products

①Surface hardness confirmation
The standard for hardening layer depth of the quenched guide shaft varies with O.D. dimension and tolerance.
Refer to the table below for details:

Outer Diameter (D)	Effective hardening layer depth
	Shaft Tolerance g7 (Economy series)	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 more	0.5 or more	0.5 or more
12, 13	0.5 or more	0.7 or more	0.5 or more
16~20			0.7 or more
25~30	above 0.8	1.0 or more

·The hardness of the processed part is reduced after the base metal is annealed.
In the following examples (processed part and its front and rear positions), the hardness may decrease due to the annealing effect of processing.

The parts that may be reduced in hardness due to annealing are:
·Female thread: when M≥D/2
·Wrench slot alteration (SC·WSC·SX)
·Plane alteration (FC·WFC)

Guide Shafts One End Tapped Bushing MISUMI Quality Stainless Steel Material Imported from Japan

·Plating of surface treatment
Machining is performed after surface treatment of base metal.
In the example on the right,//// only part D is hard chrome plated.

No electroplating treatment is applied to the following parts.
·Groove part
·Female thread part
·Wrench slot, plane, cut section

Basic Information

Basic Shape	Solid	End Shape (Left)	Tapped	End Shape (Right)	No Machining
Shaft End Perpendicularity	Perpendicularity (0.2)	Material	S45C	Heat Treatment	Induction Hardened
Surface Treatment	Hard Chrome Plating	Shaft Fit Tolerance	g7	Precision	Standard
Fastening Tool Type	With Wrench Slot

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Frequently asked question (FAQ)

Question: Why are stainless steel guide shafts rusting?: Answer: Guide shafts are made of SUS440C, which are quenched for better abrasion resistance, but the material itself is weak to corrosion. Therefore, please select hard chrome plated products for applications with higher anti-rust requirements.
Question: Why is the hardness measured on the end face center is rather low in contrast with high hardness indicated for guide shaft products in the catalog?: Answer: As the guide shaft is high-frequency quenched, a hardening layer of certain depth will form on the outer circle of the guide shaft. To ensure toughness, the material will retain original hardness at the center of the guide shaft.
Question: What are the advantages of combining guide shaft with linear bushing?: Answer: Due to rolling friction fit with the linear bushing, the guide shaft can achieve high-accuracy linear motion, causing less friction resistance to the workpiece, thus suitable for extended continuous operation.
Question: How to select models of shaft products requiring a length of 100.5mm?: Answer: The total length can be customized in 0.1mm increments with LKC alteration.
Question: Why is the end face of hard chrome plated guide shaft rusting?: Answer: The guide shaft is cut after surface treatment during material preparation. Thereafter, no surface treatment will be performed, so the cut surface is not hard-chrome plated, thus causing the end face to rust.
Question: When combined with linear bushing, some guide shafts fit closely, while others fit with clearance. Does it affect usage?: Answer: The guide shaft and linear bushing fit with each other by point-contact rolling through the steel ball circulating structure. Due to the point-contact and non-interference fit, some clearance between the shaft and the bushing is normal, which will not affect usage. The use of this structure greatly reduces frictional resistance and improves service life of the workpiece.
Question: Is the stainless steel material of MISUMI guide shafts imported?: Answer: Both the bearing steel (SUJ2) and stainless steel (SUS440C) of MISUMI guide shafts are materials imported from Japan.
Question: I hope to know about the detection method and specification accuracy of the straightness of guide shafts.: Answer: Support both ends of the guide shaft with V-shaped blocks, rotate the shaft for 1 turn at any point, and measure the amplitude of the dial meter. 1/2 of the amplitude measurement value is the straightness. Straightness varies with outer diameter and length.
Question: How much is the perpendicularity accuracy of guide shaft?: Answer: The perpendicularity of guide shaft is 0.2 for standard type and 0.03 for precision type.

Check other FAQ (6 items) Hide

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