Linear Shafts One End Stepped, Both Ends Tapped/One End Tapped

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 linear guide shaft single-end stepped type, double-end internal thread type / single-end internal thread type, steering shaft, linear shaft, chrome-plated rod

Specification Overview

Type				Material	Hardness	Surface Treatment	D (mm)	L (mm)
Internal Thread Type on both ends		Internal Thread Type on one end
Standard Type
D tolerance g7	D tolerance f8	D tolerance g7	D tolerance f8
E-SFAA	-	E-SFNA	-	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 50	25 to 1498
E-SSFAA	-	E-SSFNA	-	SUS440C or equivalent high-hardness corrosion-resistant steel
E-PSFAA	-	E-PSFNA	-	45 or GCr15		Hard chrome plating Plating hardness HV750~ Plating thickness 3µ or more~
E-PSSFAA	-	E-PSSFNA	-	SUS440C or equivalent high-hardness corrosion-resistant steel
-	E-PSFGA	-	E-PSNGA	45	-	Hard chrome plating Plating hardness: HV750 or higher Plating thickness: 10µm or more

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.

■ Tolerance of section D

D	g7	f8
8	-0.005 -0.020	-0.013 -0.035
10
12	-0.006 -0.024	-0.016 -0.043
13
15
16
18
20	-0.007 -0.028	-0.020 -0.053
25
30
35	-0.009 -0.034	-
40
50

Alterations

Code

Spec.

LKC

Change L dimension tolerance
Ordering Code LKC
When using LKC, the specified unit for the L dimension can be 0.1 mm

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

Add a wrench slot at one location
Ordering Code SC5

SC = specified unit 1 mm

SC + ℓ₁ < L

SC = 0 or SC ≥ 1
Applicable conditions Applicable for D ≥ 8

Cannot be used together with WSC

D	W	ℓ₁
8	7	8
10	8	8
12	10	10
13	11
15	13

D	W	ℓ₁
16	14	10
20	17
25	22
30	27	15

WSC

Additional machining of two wrench slots
Ordering Code WSC12-X8

WSC, X = specified unit 1 mm

WSC + X + ℓ₁ × 2 ≤ L - 2
WSC = 0 or WSC ≥ 1
X = 0 or X ≥ 1

The two wrench slots are not on the same plane.

D	W	ℓ₁
8	7	8
10	8	8
12	10	10
13	11
15	13
16	14
18	16

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

Additional flat machining at one location
Ordering Code FC10-E8
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 40	2
50	3

WFC

Additional machining on 2 surfaces
Ordering Code WFC8-A8-E4
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 surface, and cannot be used together with FC

D	h
8 to 16	1
20 to 40	2
50	3

Alterations

Code

Spec.

Add one flat surface at a 90-degree position
Ordering Code RC10
Applicable conditions Applicable for D=10 to 30

Cannot be used together with WRC

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

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

MD
ND

Change the effective length of the internal thread section to M(N) × 3.
Ordering Code MD6/ND6 (change M to MD, N to ND)
Applicable conditions Applicable for D = 12 to 30 and M(N) = 6 to 20

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

Internal threads on both ends: MD × 3.5 + 4 + ND × 3.5 + 4 ≤ L

NSC

Change the internal thread to a fine thread
Ordering Code NSC14 (change N to NSC)
Applicable conditions Applicable for D ≥ 12

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

Specification Table

Part Number		Specified unit: 1 mm			M (Coarse thread) Select											N (Coarse thread) Select											(Y) Max.
Type	D	L	F	P																							(Y) Max.
Type	D	Standard Type	F	P																							Standard Type
Stepped end with internal threads on both ends type (D tolerance g7) E-SFAA E-SSFAA E-PSFAA E-PSSFAA (D tolerance f8) E-PSFGA One end stepped, one end internal thread type (D tolerance g7) E-SFNA E-SSFNA E-PSFNA E-PSSFNA (D tolerance f8) E-PSNGA	8	25–1098	8 ≤ D ≤ 30 2 ≤ F ≤ P×5 D ≥ 35 2 ≤ F ≤ P×4	3–6	3											3	4	5									1100
	10	25–1198		3–8	3	4	5									3	4	5	6								1200
	12	25–1398		3–10	3	4	5	6								(3)	4	5	6	8							1400
	13	25–1398		4–11	3	4	5	6	8							(3)	4	5	6	8							1400
	15	25–1398		4–13	3	4	5	6	8	10						(3)	4	5	6	8	10						1400
	16	25–1398		4–14	3	4	5	6	8	10							4	5	6	8	10						1400
	20	25–1398		5–17		4	5	6	8	10	12						4	5	6	8	10	12					1400
	25	25–1398		6–22		4	5	6	8	10	12	16					4	5	6	8	10	12	16				1400
	30	25–1498		8–27			5	6	8	10	12	16	20	24					6	8	10	12	16	20			1500
	35	25–1498		9–32			5	6	8	10	12	16	20							8	10	12	16	20			1500
	40	25–1498		11–37				6	8	10	12	16	20	24							10	12	16	20	24		1500
	50	25–1498		11–47				6	8	10	12	16	20	24	30							12	16	20	24	30	1500

Outer diameters 35, 40, and 50 are limited to E-PSFAA and E-PSFNA specifications only.

For the N() dimension, only D tolerance g7 is available.

The P dimension must satisfy M+3 ≤ P.

When D-P ≤ 4 for the standard type, the chamfer C on the stepped section is less than 0.2.

For the type with a step on one end and an internal thread on the other, the L dimension must satisfy N×3 ≤ L.

When M×2.5 + 4 + N×2.5 + 4 ≥ (Y) for the standard type, the bottom of the threaded hole may penetrate through. When M×2 + N×2 ≥ (Y), the effective length of the larger diameter threaded hole takes priority. At this time, Y must satisfy Y ≥ M×2.5 + 4 + N or Y ≥ N×2.5 + 4 + M.

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