Linear Shafts Both End Threaded with Undercut, 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 cylindrical guide shafts with external threads and undercut grooves on both ends, wrench slot type / through-hole type product introduction

■ Material Specifications

Type		Material	Hardness	Surface Treatment
With Wrench Slot Type
Standard Type
D Tolerance g7	D Tolerance f8
E-SAFU	-	45 or GCr15	High-frequency quenching For effective hardened layer depth, please click Surface Hardness Reference 45 or GCr15 55HRC~ SUS440C or equivalent high-hardness corrosion-resistant steel 53HRC or more	-
E-SSAFU	-	SUS440C or equivalent high-hardness corrosion-resistant steel
E-PSAFU	-	45 or GCr15		Hard chrome plating Plating hardness HV750~ Plating thickness 3µ or more
E-PSSAFU	-	SUS440C or equivalent high-hardness corrosion-resistant steel
-	E-PSAGU	45	-	Hard chrome plating Plating hardness: HV750~ Plating thickness: 10µ 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.

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

Specification Table

Part Number		Specified unit: 1 mm		Select									Wrench Slot Size			(Y) Max.
Type	D	L	F·T	M·N (Coarse thread)									SC	W	ℓ₁	(Y) Max.
Standard Type	8	25–1090	5 ≤ F ≤ M×3 5 ≤ T ≤ N×3 F-(g) ≥ pitch×3 T-(g) ≥ pitch×3	5	6								SC = specified unit 1 mm SC + ℓ₁ ≤ L SC ≥ 0 Wrench slot details >>See (PDF)	7	8	1100
(With wrench slot type) (D Tolerance g7) E-SAFU E-SSAFU E-PSAFU E-PSSAFU (D Tolerance f8) E-PSAGU	10	25–1190		5	6	8								8	8	1200
	12	25–1390		5	6	8	10							10	10	1400
	13	25–1390		5	6	8	10	12						11		1400
	15	25–1390		5	6	8	10	12						13		1400
	16	25–1390		5	6	8	10	12						14		1400
	20	25–1390		5	6	8	10	12	16					17		1400
	25	25–1390		5	6	8	10	12	16	20	24			22		1400
	30	25–1490			6	8	10	12	16	20	24			27	15	1500
	35	25–1490					10	12	16	20	24	30		30	15	1500
	40	25–1490						12	16	20	24	30		36	20	1500
	50	25–1490							16	20	24	30		41	20	1500

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

D Tolerance
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

		Type	-	L	-	F	-	M (MMC MMS)	-	T	-	N (NMC NMS)	-	SC	-	H	-	(LKC: etc.)
		SAFU30	-	300	-	F40	-	M20	-	T46	-	N16	-	SC20			-	LKC

Alterations

Code

Spec.

Misumi guide shaft, one end stepped with internal thread type

LKC

Change L dimension tolerance
Ordering Code LKC
Applicable conditions The maximum L dimension for precision type is 200
When using LKC, the unit for specifying 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 second wrench slot machining
Ordering Code SX15
Applicable conditions Only applicable to types with wrench slots
SX = specified unit 1 mm

SC+SX+ℓ₁×2 ≤ L-2

SX ≥ 0

Cannot be machined 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 1 location
Ordering Code FC10-E8
Applicable conditions

Not applicable for precision type
FC, E = specified unit 1 mm

D ≤ 30, FC ≤ 5 × D

D ≥ 35, FC ≤ 3 × D

E = 0 or E ≥ 2

Cannot be used together with WFC

D	h
8 to 18	1
20 to 40	2
50	3

WFC

Additional flat machining at 2 locations
Ordering Code WFC8-A8-E4
Applicable conditions

Not applicable for precision type
WFC, A, E = specified unit 1 mm

D ≤ 30, WFC ≤ 5×D

D ≥ 35, WFC ≤ 3×D

A(E)=0 or A(E) ≥ 2

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

D	h
8 to 18	1
20 to 40	2
50	3

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

Not suitable for precision type

Cannot be used together with WRC

D	b1	h
10	6	0.5
12–20	6	1
25	10
30	12

For details, please refer to the additional machining overview P.107

WRC

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

Not suitable for precision type

Cannot be used together with RC

Cannot be machined on the same plane

MMC
MMS
NMC
NMS

Change external thread to fine thread
Ordering Code MMC14 (change M to MMC)
MMS14 (change M to MMS)
NMC14 (change N to NMC)
NMS14 (change N to NMS)

D	MMC·NMC												MMS·NMS
8	3	4	5	6	8
10		4	5	6	8	10							10
12			5	6	8	10	12						10	12
13			5	6	8	10	12						10
15			5	6	8	10	12	15					10	12
16			5	6	8	10	12	15					10	12	14
18			5	6	8	10	12	15	17				10	12	14	18
20				6	8	10	12	15	17	20			10	12	14	18
25					8	10	12	15	17	20	25		10	12	14	18
30					8	10	12	15	17	20	25	30	10	12	14	18
35						10	12	15	17	20	25	30	10	12	14	18
40							12	15	17	20	25	30		12	14	18
50								15	17	20	25	30			14	18
Pitch	0.35	0.5		0.75	1						1.5		1.25	1.5

Fine thread relief dimension (1)

MMC	Pitch	MC	g
NMC	Pitch	NC	g
6	0.75	4.8	2
8	1	6.4
10		8.4
12		10.4
15		13.4
17		15.4
20		18.4

Fine thread relief dimensions (2)

MMS	Pitch	MC	g
NMS	Pitch	NC	g
10	1.25	8	3
12	1.5	9.7
14		11.7
18		15.7

For details on additional machining with a summary, please refer to the additional machining overview.

P.107

When selecting multiple additional machining options, there must be at least a 2 mm gap between machining locations.

P.108

Additional machining may result in reduced hardness.

P.106

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