Linear Shaft One End Tapered, One End Stepped, Tapped/ Threaded

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

Note: When B=0 or S=0, it means there is no thread.
MISUMI Guide Shaft One End Tapered Internal Thread Type Product Introduction

Specification Overview

Type	Material	Hardness	Surface Treatment	D(mm)	L(mm)
D tolerance g7
E-SFTF	S45C or GCr15	High-frequency quenching For effective hardened layer depth, please click Surface Hardness Standard S45C or GCr15 55HRC~ SUS440C or equivalent high-hardness corrosion-resistant steel 53HRC or more	-	6 to 20	25 to 500
E-SSFTF	SUS440C or equivalent high-hardness corrosion-resistant steel
E-PSFTF	S45C or GCr15		Hard Chrome Plating Coating Hardness HV750~ Coating Thickness 5µ or more~
E-PSSFTF	SUS440C or equivalent high-hardness corrosion-resistant steel

Type	Material	Hardness	Surface Treatment	D(mm)	L(mm)
D tolerance g7
E-SFTG	S45C or GCr15	High-frequency quenching For effective hardened layer depth, please click Surface Hardness Standard S45C or GCr15 55HRC~ SUS440C or equivalent high-hardness corrosion-resistant steel 53HRC or more	-	8 to 20	25 to 498
E-SSFTG	SUS440C or equivalent high-hardness corrosion-resistant steel
E-PSFTG	S45C or GCr15		Hard Chrome Plating Coating Hardness HV750~ Coating Thickness 5µ or more~
E-PSSFTG	SUS440C or equivalent high-hardness corrosion-resistant steel

Type	Material	Hardness	Surface Treatment	D(mm)	L(mm)
D tolerance g7
E-SFTN	S45C or GCr15	High-frequency quenching For effective hardened layer depth, please click Surface Hardness Standard S45C or GCr15 55HRC~ SUS440C or equivalent high-hardness corrosion-resistant steel 53HRC or more	-	6 to 20	25 to 498
E-SSFTN	SUS440C or equivalent high-hardness corrosion-resistant steel
E-PSFTN	S45C or GCr15		Hard Chrome Plating Coating Hardness HV750~ Coating Thickness 5µ or more~
E-PSSFTN	SUS440C or equivalent high-hardness corrosion-resistant steel

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. Please click

Rust Prevention Methods

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

Alterations

Alterations	Code	Spec.
	LKC	Change L tolerance. Specification Method LKC L<200 L±0.03 200 ≤ L<500 L+0.05 L=500 L±0.1 When using LKC, L dimension can be specified in units of 0.1 mm Not applicable when D=P Not applicable for type with internal thread on one end and external thread on the other end.
	AC	Change the front taper angle. Specified Method AC5 Specified Angles: 5° 10° 20° 25° 30° D-Jtan (AC°) × 2 ≥ 2 L-J ≥ 20 must be satisfied.

Specification Table

■ One End Tapered · One End Female Thread Type

Part Number		Can be specified down to 1 mm increments		M (Coarse Thread) Selection
Type	D	L	J	M (Coarse Thread) Selection
E-SFTF E-SSFTF E-PSFTF E-PSSFTF	6	25 to 200	5 to 7	3
	8	25 to 200	5 to 10	3	4	5
	10	30 to 200	5 to 14	3	4	5	6
	12	40 to 300	5 to 18		4	5	6	8
	13	40 to 300	5 to 20		4	5	6	8
	15	50 to 300	10 to 24		4	5	6	8
	16	50 to 500	10 to 25		4	5	6	8	10
	20	60 to 500	10 to 32		4	5	6	8	10	12

L must satisfy L-J ≥ 20.

Outer diameter 6 is only applicable to E-SSFTF, E-PSSFTF

■ One End Tapered · One End Stepped Internal Thread Type

Part Number		Can be specified down to 1 mm increments				M (Coarse Thread) Selection
Type	D	L	F	P	J	M (Coarse Thread) Selection
E-SFTG E-SSFTG E-PSFTG E-PSSFTG	8	25 to 198	2 ≤ F ≤ P × 4	6	5 to 10	3
	10	30 to 198		6 to 8	5 to 14	3	4	5
	12	40-298		6 to 10	5 to 18	3	4	5	6
	13	40-298		6 to 11	5 to 20	3	4	5	6	8
	15	50-298		6 to 13	10 to 24	3	4	5	6	8	10
	16	50-498		6 to 14	10 to 25	3	4	5	6	8	10
	20	60-498		8 to 17	10 to 32		4	5	6	8	10	12

P size must satisfy M+3 ≤ P.

L must satisfy L-J ≥ 20.

■ One end tapered, one end external thread type

Part Number		Can be specified down to 1 mm increments			P Selection									Can be specified down to 1 mm increments
Type	D	L	F	B	P Selection									J
E-SFTN E-SSFTN E-PSFTN E-PSSFTN	6	25 to 198	2 ≤ F ≤ P × 5	B ≤ F-2 (When P ≤ 6) B ≤ F-3 (When P = 8·10) B ≤ F-5 (When P ≥ 12) B = 0 (When there is no thread)	3	4	5	6						5 to 7
	8	25 to 198			3	4	5	6	8					5 to 10
	10	30 to 198				4	5	6	8	10				5 to 14
	12	40-298					5	6	8	10	12			5 to 18
	13	40-298					5	6	8	10	12			5 to 20
	15	50-298					5	6	8	10	12			10 to 24
	16	50-498					5	6	8	10	12	16		10 to 25
	20	60-498					5	6	8	10	12	16	20	10 to 32

When D = P, please specify the B dimension as F = B. However, since L size and F size are prioritized for processing, the B size of the product becomes F - (pitch × 2).

When B = 0 is specified, thread processing will not be performed.

L must satisfy L-J ≥ 20.

B must be greater than or equal to Pitch × 3.

Outer diameter 6 is only applicable to E-SSFTN, E-PSSFTN

D tolerance
D	g7
6	-0.004 -0.016
8	-0.005 -0.020
10	-0.005 -0.020
12	-0.006 -0.024
13
15
16
18
20	-0.007 -0.028

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 equivalent 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 bushing products, it provides excellent linear guidance. Compared to general 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

(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 equivalent 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 with Stepped Ends and Internal Thread | Stepped End Bushings | MISUMI Quality | Imported Japanese Stainless Steel Material

Guide Shaft with Stepped Ends and Internal Thread | Stepped End Bushings | 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 may rust if hard chrome plating is not applied.

Example of Use

Standard Linear Motion Mechanism	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.
Sample Image


Actual Product Image	Function of Key Components in the Mechanism Linear Guide Shaft: Supports components and, when used with linear bushings, provides guiding functionality. Click for details Linear guide shaft Linear Bushing: Uses a ball circulation structure to move the workpiece along the guide shaft. For details, click Linear Bushings Guide Shaft Support: Supports and secures the guide shaft, effectively adjusts shaft spacing, and enhances equipment stability. For details, click Guide Shaft Support Stopper: Serves as a limit, used to adjust the effective stroke of the mechanism For more details, click Stopper

Application Industries

Medical	Semiconductor	Electronic & Electrical Appliances

Smart phone	Food	Automotive

Linear bushings Standard type Straight type	Bearing housing set T-type	Shaft Collar Slit

Typical model: LMU6	Typical model: BGHFS6000ZZ-30	Typical model: PSCS10-10
Advantages: High quality, low price, short delivery time	Advantages: full range, high precision and high quality	Advantages: full range of matching shaft products