Linear Shafts One End Stepped and Tapped with Wrench Flats

Brand :

MISUMI

Caution

Product Description

This is an economy item, The price is cheaper than the MISUMI standard product.

Product Overview

The linear guide shaft is a high-precision shaft product that can be used in combination with linear bearings and other bushing-type products. It not only offers excellent wear resistance, but also provides a variety of additional processing options.

Dimensional Drawing

MISUMI guide shaft with stepped end, internal thread, and wrench slot type product introduction

Material Specifications

Type	Material	Hardness	Surface Treatment	D (mm)	L (mm)
Standard Type
D Tolerance g7
E-SFPG	45 or GCr15	High-frequency quenching Effective hardened layer depth Please click Surface Hardness Reference 45 or GCr15 55HRC~ SUS440C or equivalent high-hardness corrosion-resistant steel 53HRC or more	-	8 to 30	25 to 1498
E-SSFPG	SUS440C or equivalent high-hardness corrosion-resistant steel
E-PSFPG	45 or GCr15		Hard chrome plating Plating hardness HV750~ Plating thickness 3µ or more
E-PSSFPG	SUS440C or equivalent high-hardness corrosion-resistant steel

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

If rust prevention is required, please give priority to products with hard chrome plating Surface Treatment. Please click

Rust Prevention Methods

If used together with linear bearings, please choose products with high-frequency quenching.

Specification Overview

■ Tolerance of section D

D	g7
8	-0.005 -0.020
10	-0.005 -0.020
12	-0.006 -0.024
13
15
16
18
20	-0.007 -0.028
25
30
35	-0.009 -0.034
40
50

Specification Table

Part Number		Specified unit: 1 mm			M (Coarse thread) Select											Wrench Slot Size			(Y) Max.
Type	D	L	F	P	M (Coarse thread) Select											SC	W	ℓ₁	(Y) Max.
Standard Type (D Tolerance g7) E-SFPG E-SSFPG E-PSFPG E-PSSFPG	8	25–1098	8 ≤ D ≤ 30 2 ≤ F ≤ P×5 D ≥ 35 2 ≤ F ≤ P×4	6	3											SC = specified unit 1 mm SC +ℓ₁ ≤ L SC ≥ 0 Wrench slot details >>See (PDF)	7	8	1100
	10	25–1198		6–8	3	4	5										8	8	1200
	12	25–1398		6–10	3	4	5	6									10	10	1400
	13	25–1398		6–11	3	4	5	6	8								11		1400
	15	25–1398		6–13	3	4	5	6	8	10							13		1400
	16	25–1398		6–14	3	4	5	6	8	10							14		1400
	20	25–1398		7–17		4	5	6	8	10	12						17		1400
	25	25–1398		7–22		4	5	6	8	10	12	16					22		1400
	30	25–1498		8–27			5	6	8	10	12	16	20	24			27	15	1500
	35	25–1498		9–32			5	6	8	10	12	16	20				30	15	1500
	40	25–1498		11–37				6	8	10	12	16	20	24			36	20	1500
	50	25–1498		11–47				6	8	10	12	16	20	24	30		41	20	1500

Outer diameters 35, 40, and 50 are only available for E-PSFPG specifications.

Alterations

Code

Spec.

LKC

Change L dimension tolerance.
Ordering Code LKC

L<200 → L±0.03

When using LKC, the specified unit for the L dimension can be 0.1 mm

Add surface machining at 1 location
Ordering Code FC10-E8
For FC, E = specified unit 1 mm

When D ≤ 30, FC ≤ 5×D

When D ≥ 35, FC ≤ 3 × D

E = 0 or E ≥ 2

Cannot be used together with WFC

D	h
8 to 16	1
20 to 30	2

WFC

Additional planar machining at 2 locations
Ordering Code WFC10-A8-E20
WFC, A, E = specified unit 1 mm

When D ≤ 30, WFC ≤ 5 × D

When D ≥ 35, WFC ≤ 3 × D

A(E) = 0 or A(E) ≥ 2

Cannot be machined on the same plane and cannot be used together with FC

D	h
8 to 16	1
20 to 30	2

Additional flat machining at one 90-degree position
Ordering Code RC10
Applicable conditions Applicable for D=10 to 30

RC = specified in 1 mm increments

RC + b1 ≤ L

RC ≥ 2

Cannot be used together with WRC

D	b1	h
10	6	0.5
12–20	6	1
25	10
30	12

WRC

Add flat machining at two 90-degree positions
Ordering Code WRC10-Y10
Applicable conditions Applicable for D=10 to 30

Cannot be used together with RC

Cannot be machined on the same plane

D	b1	h
10	6	0.5
12–20	6	1
25	10
30	12

Add a second wrench slot machining.
Ordering Code SX15

SX = specified unit 1 mm

SC + SX + ℓ1 × 2 < L

SX ≥ 0
Applicable conditions Applicable for D ≥ 6, only available for types with wrench slots

Cannot be machined on the same plane, 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
18	16	10
20	17
25	22
30	27	15
35	30	15
40	36	20
50	41	20

LFC

Flat machining on the stepped section
Ordering Code LFC10-A0

LFC ≤ F

D-M(N) ≥ 1

P	H
6 to 18	1
20 to 40	2
41 or more	2

Change the effective length of the internal thread section to M×3.
Ordering Code MD6 (change M to MD)
Applicable conditions D = 12 to 30, and applicable for M = 6 to 20

Internal thread on one end: MD×3.5+4 ≤ L

Add an additional keyway
Ordering Code KC10-G10

KC, G = specified unit 1 mm

b ≤ G ≤ 30, G ≤ L/3

L>500: 2 ≤ KC ≤ L/3
L<500: 2 ≤ KC ≤ 500

M×2<KC+F
Only applicable for D = 12, 16, 20, 25, 30

Internal thread section (M×2.5+4) is not applicable for this additional machining.

MISUMI linear guide shaft with retaining ring groove, steering shaft, linear shaft, chrome-plated rod

Shaft diameter	b		t		r
	Nominal dimension	Permissible tolerance (N9)	Nominal dimension	Permissible tolerance
12	4	0 -0.03	2.5	+0.1 0	0.08 to 0.16
16	5		3		0.16 to 0.25
20	6		3.5
25	8	0 -0.036	4	+0.2 0
30

When KC and WKC = 0, the keyway shape is as shown below.

When KC + G ≥ L, the keyway shape is as shown below.

WKC

Add two additional keyways
Ordering Code KC10-G10-WKC10-C8

KC, WKC, G, C = specified unit 1 mm

b ≤ G(C) ≤ 30, G(C) ≤ L/3

L > 500: 2 ≤ KC(WKC) ≤ L/3
L < 500: 2 ≤ KC(WKC) ≤ 500

G + C ≤ L/3

M×2 < KC + F
Only applicable for D = 12, 16, 20, 25, 30

Cannot be machined on the same plane

Internal thread section (M×2.5+4) is not applicable for this additional machining.

When selecting multiple additional machining operations, there must be a gap of at least 2 mm between the machined areas.

Additional machining may result in reduced hardness. Please refer to

P.36

Product Features

Feature 1: Offers high-precision dimensional tolerances and is widely used in various precision equipment.
Feature 2: Uses bearing steel with excellent wear resistance (45 or GCr15) and SUS440C or equivalent high-hardness, corrosion-resistant steel, which undergo high-frequency quenching to enhance wear resistance while maintaining original toughness.
Feature 3: Various additional processing options are available to meet different usage environments.
Feature 4: Typically used in combination with linear bearing products, it provides excellent linear guidance. Compared to standard shaft and bushing structures, even during high-speed reciprocating motion, there is minimal wear.
Feature 5: Hard chrome plating is available as a Surface Treatment, offering excellent rust resistance. The coating hardness reaches HV750, so it will not be easily worn even when used with high-hardness workpieces.

Precautions

(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 internal threads, and hard chrome plated products made of SUS440C or other high-hardness corrosion-resistant steels
- 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 double stepped internal thread type, double stepped bushing, MISUMI quality, Japanese imported stainless steel material

Guide shaft double stepped internal thread type, double stepped 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

Standard Linear Motion Mechanism	Functions of the Standard Linear Motion Mechanism (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.
Example Diagram


Actual Product Photo	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 bushing: Uses a ball circulation structure to drive the workpiece along the guide shaft. Click for details Linear Bushing Guide shaft support: Supports and secures the guide shaft, effectively adjusts the shaft spacing, and improves the stability of the equipment. Click for details Guide Shaft Support Pusher: Serves as a limit, used to adjust the effective stroke of the mechanism Click for details Pusher

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 and high quality	Advantages: Supporting shaft products, complete range