Linear Shafts Both End Threaded with Wrench Flats

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.

Type		Material	Hardness	Surface Treatment	D (mm)	L (mm)
With Wrench Slot Type
Standard Type
D Tolerance g7	D Tolerance f8
E-SFAU	-	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	-	6 to 50	25 to 1496
E-SSFAU	-	SUS440C or equivalent high-hardness corrosion-resistant steel
E-PSFAU	-	45 or GCr15		Hard chrome plating Plating hardness HV750~ Plating thickness 3µ or more
E-PSSFAU	-	SUS440C or equivalent high-hardness corrosion-resistant steel
-	E-PSFGU	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. Please click Rust Prevention Methods
If used together with linear bearings, please choose products with high-frequency quenching.
 

Alterations	Code	Spec.
	LKC	Change L dimension tolerance Ordering Code LKC When using LKC, the unit specified 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
	FC	Additional surface machining at 1 location Ordering Code FC10-E8 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 6 to 16 1 20 to 40 2 50 3
	WFC	Additional planar machining at 2 locations Ordering Code WFC8-A8-E4 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 6 to 16 1 20 to 40 2 50 3
	SX	Add a second wrench slot machining Ordering Code SX15 SX = specified unit 1 mm SC + SX + ℓ1 × 2 < L SX ≥ 0 Cannot be machined on the same plane	D W ℓ1 8 7 8 10 8 12 10 10 13 11 15 13 16 14 18 16	D W ℓ1 20 17 10 25 22 30 27 15 35 30 40 36 20 50 41
	PC QC	PC: Perform undercut machining on the P dimension section. QC: Perform undercut machining on the Q dimension section. Ordering Code PC For details on undercut machining dimensions, please refer to P.37 Applicable conditions Applicable for M ≥ 6 Not applicable for D = Q or D = P	· When using coarse threads P PC Q QC 6 4.4 8 6 10 7.7 12 9.4 16 13 20 16.4 24 19.6 30 25	· When used in combination with fine threads PMC PC QMC QC 6 4.8 8 6.4 10 8.4 12 10.4 15 13.4 17 15.4 20 18.4 25 22.7 30 22.7	PMC PC QMC QC 10 8 12 9.7 14 11.7 18 15.7
	RC	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	D b1 h 10 6 0.5 12–20 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 1 25 10 30 12
	PMC PMS QMC QMS	Change the external thread to a fine thread PMC·QMC: Fine thread pitch suitable for bearing locknuts PMS·QMS: Fine thread pitch suitable for cylinders	D PMC PMS 6 3 4 5 6                         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

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

Part Number		Specified unit: 1 mm			P·Q Selection											Wrench Slot Size			(Y) Max.
Type	D	L	F·T	B·S												SC	W	ℓ1
Standard Type (With Wrench Slot) (D Tolerance g7) E-SFAU E-SSFAU E-PSFAU E-PSSFAU (D Tolerance f8) E-PSFGU	6	25–896	2 ≤ F ≤ P × 5 2 ≤ T ≤ Q × 5	(When P ≤ 6) B ≤ F-2 (When P = 8 or 10) B ≤ F-3 (When P ≥ 12) B ≤ F-5 (When Q ≤ 6) S ≤ T-2 S ≤ T-3 (When Q ≥ 12) S ≤ T-5 (When there is no thread) B = 0 S = 0 B·S ≥ pitch×3	3	4	5									SC = specified unit 1 mm SC + ℓ1 ≤ L SC ≥ 0 Wrench slot details >>See (PDF)	5	8	900
	8	25–1096			3	4	5	6									7		1100
	10	25–1196			3	4	5	6	8								8		1200
	12	25–1396			3	4	5	6	8	10							10	10	1400
	13	25–1396				4	5	6	8	10	12						11		1400
	15	25–1396				4	5	6	8	10	12						13		1400
	16	25–1396				4	5	6	8	10	12						14		1400
	20	25–1396					5	6	8	10	12	16					17		1400
	25	25–1396						6	8	10	12	16	20	24			22		1400
	30	25–1496							8	10	12	16	20	24			27	15	1500
	35	25–1496								10	12	16	20	24	30		30		1500
	40	25–1496									12	16	20	24	30		36	20	1500
	50	25–1496										16	20	24	30		41		1500

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

D Tolerance
D	g7	f8
6	-0.004 -0.016	-0.010 -0.028
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

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.

Corrosion resistance of metal materials and Surface Treatments Click Corrosion Resistance Table