Rotary Shafts-One End Stepped and Tapped

Brand :

MISUMI

Caution

Product Description

Expanded to a maximum length of 1000mm!
It is also possible to process key grooves, flats, and retaining rings on stepped parts with additional machining!

[Basic shape] Single step on one end
[Shaft end shape (left)] Stepped female thread
[Shaft end shape (right)] No processing
[Material] Equivalent to S45C, SUS304
[Additional machining available] Keyway, retaining ring groove, flat surface, slit cam groove, L dimension tolerance change, slotted groove, concentricity change, C chamfer width change, female thread depth change

Rotary Shafts – Stepped, Threaded Types

These rotary shafts have a single step with a female thread at one end, and a plain end at the other. Lengths up to 1000 mm are available, and keyways, flats and retaining ring grooves can be added to the stepped part. Materials: S45C equivalent, SUS304 and high-hardness stainless steel.

Dimensional drawing

Rotary Shafts – Stepped, Threaded Types

Wrench-flat type

Surface roughness of part D: h9 (cold-drawn bar) uses the first image below; h7 and g6 (ground bar) use the second image.

Rotary Shafts – Stepped, Threaded Types

High-hardness stainless steel may have a center hole.

Tolerance table

D, P	h9 (cold-drawn bar)	h7 (ground bar)	g6 (ground bar)
4–6	0 -0.030	0 -0.012	-0.004 -0.012
8, 10	0 -0.036	0 -0.015	-0.005 -0.014
12–18	0 -0.043	0 -0.018	-0.006 -0.017
20–30	0 -0.052	0 -0.021	-0.007 -0.020
35–50	0 -0.062	0 -0.025	-0.009 -0.025

Roundness and straightness / Coaxiality and perpendicularity

Rotary Shafts – Stepped, Threaded Types

D roundness

D		Roundness M
Over	Up to	Roundness M
5	13	0.004
13	20	0.005
20	40	0.006
40	50	0.007

L, F and SC dimensional tolerances

Dimension		Dimension tolerance
Over	Up to	Dimension tolerance
2	6	±0.1
6	30	±0.2
30	120	±0.3
120	400	±0.5
400	1000	±0.8

Conforms to JIS B 0405 m class (medium).
For h9 (cold-drawn bar), D roundness, straightness, coaxiality and perpendicularity do not apply.

Type			Tolerance		Material	Surface treatment
No.	Standard type	Wrench-flat type	D	P	Material	Surface treatment
①	NSFRMHG	NSFRMHGS	h9 (cold-drawn bar)	h7	S45C equivalent	-
	SFRMHG	SFRMHGS				Black oxide
	PSFRMHG	PSFRMHGS				Electroless nickel plating
	SSFRMHG	SSFRMHGS			SUS304	-
②	NSFRMGG	NSFRMGGS		g6	S45C equivalent	-
	SFRMGG	SFRMGGS				Black oxide
	PSFRMGG	PSFRMGGS				Electroless nickel plating
	SSFRMGG	SSFRMGGS			SUS304	-
③	NSFRHG	NSFRHGS	h7 (ground bar)	h7	S45C equivalent	-
	SFRHG	SFRHGS				Black oxide
	PSFRHG	PSFRHGS				Electroless nickel plating
	SSFRHG	SSFRHGS			SUS304	-
④	NSFRG	NSFRGS	g6 (ground bar)	g6	S45C equivalent	-
	SFRG	SFRGS				Black oxide
	PSFRG	PSFRGS				Electroless nickel plating
	SSFRG	SSFRGS			SUS304	-
	AHFRG	AHFRGS			High-hardness stainless steel Hardness 35HRC min.	-

Center hardness of high-hardness stainless steel is lower.

Part numbers and dimensions

Ordering example

Item	Type	-	L	-	F	-	P	-	M	-	SC
① D part h9 / P part h7	SFRMHG30	-	250	-	F30	-	P16	-	M10
③ h7 (ground bar), wrench-flat type	SFRHGS25	-	200	-	F40	-	P20	-	M10	-	SC30
④ g6 (ground bar)	SF-SSFRG20	-	200	-	F20	-	P18	-	M12

① D part tolerance h9 (cold-drawn bar) / P part tolerance h7, ② D part tolerance h9 (cold-drawn bar) / P part tolerance g6 types

Type			0.1 mm increments		1 mm increments	M (coarse) Selection											1 mm increments	W	ℓ2	(Y) max.
Type		D	L	F	P												SC Wrench-flat type only
Standard type	Wrench-flat type	D	L	F	P												SC Wrench-flat type only
① D part h9, P part h7 NSFRMHG SFRMHG PSFRMHG SSFRMHG (SSFRMHG: D13, 17, 18, 22 not available) ② D part h9, P part g6 NSFRMGG SFRMGG PSFRMGG SSFRMGG (SSFRMGG: D13, 17, 18, 22 not available)	① D part h9, P part h7 NSFRMHGS SFRMHGS PSFRMHGS SSFRMHGS (SSFRMHGS: D13, 17, 18, 22 not available) ② D part h9, P part g6 NSFRMGGS SFRMGGS PSFRMGGS SSFRMGGS (SSFRMGGS: D13, 17, 18, 22 not available)	6	15.0–498.0	2≤F≤P×5	5	2.6	3										SC+ℓ2 ≤ L SC = 0 or SC ≥ 1 When SC ≤ M×3-F: W-M ≥ 2	5	8	500
		8	15.0–498.0		For M3–M8: M+2 ≤ P < D For M10–M16: M+3 ≤ P < D For M20, M24: M+4 ≤ P < D	2.6	3	4	5									7		500
		10	15.0–798.0				3	4	5	6								8		800
		12	15.0–898.0				3	4	5	6	8							10	10	900
		13	15.0–898.0				3	4	5	6	8							11		900
		15	15.0–998.0				3	4	5	6	8	10						13		1000
		16	15.0–998.0					4	5	6	8	10	12					14
		17	24.0–998.0					4	5	6	8	10	12					14
		18	24.0–998.0					4	5	6	8	10	12					15
		20	24.0–998.0					4	5	6	8	10	12	16				17
		22	24.0–998.0					4	5	6	8	10	12	16				19
		25	24.0–998.0					4	5	6	8	10	12	16	20			22
		30	24.0–998.0						5	6	8	10	12	16	20			27	15
		35	40.0–998.0							6	8	10	12	16	20	24		30	15

L-SC≤N×3

③ h7 (ground bar) type

Type			0.1 mm increments		1 mm increments	M (coarse) Selection												1 mm increments	W	ℓ2	(Y) max.
Type		D	L	F	P													SC Wrench-flat type only
Standard type	Wrench-flat type	D	L	F	P													SC Wrench-flat type only
NSFRHG SFRHG PSFRHG SSFRHG	NSFRHGS SFRHGS PSFRHGS SSFRHGS	6	15.0–498.0	2≤F≤P×5	5	2.6	3											SC+ℓ2 ≤ L SC = 0 or SC ≥ 1 When SC ≤ M×3-F: W-M ≥ 2	5	8	500
		8	15.0–498.0		For M3–M8: M+2 ≤ P < D For M10–M16: M+3 ≤ P < D For M20, M24: M+4 ≤ P < D For M30: M+5 ≤ P < D	2.6	3	4	5										7		500
		10	15.0–798.0				3	4	5	6									8		800
		12	15.0–898.0				3	4	5	6	8								10	10	900
		15	15.0–998.0				3	4	5	6	8	10							13		1000
		17	24.0–998.0					4	5	6	8	10	12						14		1000
		20	24.0–998.0					4	5	6	8	10	12	16					17		1000
		25	24.0–998.0					4	5	6	8	10	12	16	20				22
		30	24.0–998.0						5	6	8	10	12	16	20				27	15
		35	40.0–998.0							6	8	10	12	16	20	24			30	15
		40	40.0–998.0									10	12	16	20	24	30		36	20
		50	40.0–998.0										12	16	20	24	30		41	20

L-SC≤N×3

④ g6 (ground bar) type

Type			0.1 mm increments		1 mm increments	M (coarse) Selection												1 mm increments	W	ℓ2	(Y) max.
Type		D	L	F	P													SC Wrench-flat type only
Standard type	Wrench-flat type	D	L	F	P													SC Wrench-flat type only
NSFRG SFRG PSFRG SSFRG AHFRG (sizes marked * only)	NSFRGS SFRGS PSFRGS SSFRGS AHFRGS (sizes marked * only)	* 6	15.0–498.0	2 ≤ F ≤ P×5 AHFRG and AHFRGS only: 2 ≤ F ≤ P×4	5	2.6	3											SC+ℓ2 ≤ L SC = 0 or SC ≥ 1 When SC ≤ M×3-F: W-M ≥ 2	5	8	500
		* 8	15.0–498.0		For M3–M8: M+2 ≤ P < D For M10–M16: M+3 ≤ P < D For M20, M24: M+4 ≤ P < D For M30: M+5 ≤ P < D	2.6	3	4	5										7		500
		*10	15.0–798.0				3	4	5	6									8		800
		*12	15.0–898.0				3	4	5	6	8								10	10	900
		13	15.0–898.0				3	4	5	6	8								11		900
		*15	15.0–998.0				3	4	5	6	8	10							13		1000
		*16	15.0–998.0					4	5	6	8	10	12						14
		17	24.0–998.0					4	5	6	8	10	12						14
		18	24.0–998.0					4	5	6	8	10	12						15
		*20	24.0–998.0					4	5	6	8	10	12	16					17		1000
		22	24.0–998.0					4	5	6	8	10	12	16					19
		*25	24.0–998.0					4	5	6	8	10	12	16	20				22
		30	24.0–998.0						5	6	8	10	12	16	20				27	15
		35	40.0–998.0							6	8	10	12	16	20	24			30	15
		40	40.0–998.0									10	12	16	20	24	30		36	20
		50	40.0–998.0										12	16	20	24	30		41	20

When D-P ≤ 2, step chamfer C is 0.2 or less.
L-SC ≤ N×3
For AHFRG and AHFRGS, D10–25, overall length (Y) is max. 800.

Alterations

Alterations are available. Refer to the alteration table for applicable codes, dimensional limits and conditions.

For details, please see the PDF catalog.

Technical reference

Keyway dimensions

Shaft dia.	b		t		r
Shaft dia.	Basic size	Tolerance (N9)	Basic size	Tolerance	r
6–7	2	-0.004 -0.029	1.2	+0.1 0	0.08–0.16
8–10	3	-0.004 -0.029	1.8
11–12	4	0 -0.03	2.5
13–17	5		3.0		0.16–0.25
18–22	6		3.5
23–30	8	0 -0.036	4.0	+0.2 0
31–38	10	0 -0.036	5.0		0.25–0.4
39–44	12	0 -0.043	5.0
45–50	14	0 -0.043	5.5

b ≤ A, E, C ≤ 100
Not available for D = 2–5.

Rotary shaft retaining ring groove dimensions by shaft diameter

Shaft dia.	d tolerance		Groove width (m) tolerance		Applicable retaining ring	Material
2	1.2	+0.06 0	0.4	+0.05 0	JIS type E 1.2	SUS304
2.5	1.5		0.5		JIS type E 1.5
3	2		0.5		JIS type E 2
4	3		0.7	+0.1 0	JIS type E 3
5	4	+0.075 0			JIS type E 4
6	5				JIS type E 5
7	6		0.9		JIS type E 6
8	7	+0.09 0			JIS type E 7
9	8	+0.09 0			JIS type E 8
10	9.6	0/-0.09	1.15	+0.14 0	JIS type C 10	SUS304
11	10.5	0 -0.11			JIS type C 11
12	11.5				JIS type C 12
13	12.4				JIS type C 13
14	13.4				JIS type C 14
15	14.3				JIS type C 15
16	15.2				JIS type C 16
17	16.2				JIS type C 17
18	17		1.35		JIS type C 18
19	18		1.35		JIS type C 19

Shaft dia.	d tolerance		Groove width (m) tolerance		Applicable retaining ring	Material
20	19	0 -0.21	1.35	+0.14 0	JIS type C 20	SUS304
21	20				JIS type C 21
22	21				JIS type C 22
23	22				JIS type C 23
24	22.9				JIS type C 24
25	23.9				JIS type C 25
26	24.9				JIS type C 26
28	26.6		1.65		JIS type C 28
29	27.6				JIS type C 29
30	28.6				JIS type C 30
32	30.3	0 -0.25			JIS type C 32
35	33				JIS type C 35
40	38		1.9		JIS type C 40
45	42.5		1.9		JIS type C 45
50	47		2.2		JIS type C 50

Groove width (m) follows the former JIS standard JIS B 2805 (1978).

(Reference) center hardness of high-hardness stainless steel

D	Center hardness (HRC)
3	35 or more
4	35 or more
5	35 or more
6	35 or more
8	35 or more
10	30 or more
12	30 or more
15	30 or more
16	30 or more
20	25 or more
25	25 or more

(Reference) mechanical properties

Material	Tensile strength (MPa)	Yield point (0.2% proof stress) (MPa)	Young's modulus (GPa)	Shear modulus (GPa)	Poisson's ratio
S45C	570 or more	345 or more	200 or more	77 or more	0.3
SUS304	520 or more	210 or more	193 or more	74 or more	0.3
SCM435	930 or more	785 or more	206 or more	79 or more	0.3
High-hardness stainless steel	1102	715	199	77	0.3

Chemical composition (%)

C	Si	Mn	P	S	Ni	Cr
0.15-0.25	≤0.50	7.5-9.5	≤0.05	≥0.12	1.5-3.0	13-15

[O-ring details]

O-ring material	Hardness	Color	Type
Urethane rubber	94	Milky white	Iron Rubber O-ring P series (NOK)
Nitrile rubber	70	Black	JIS B 2401 P series (NOK)
Nitrile rubber	90	Black
Fluororubber	70	Black

Application examples

Rotary Shafts – Stepped, Threaded Types