JIS standard parallel shaft keys

Features of Seiki Seisakujyo JIS-compliant parallel shaft keys

Stable and accurate precision of materials: We use precision cold-drawn materials that allow us to ensure quality and minimize variability within lots to the smallest extent.
Abundant stock: We maintain an inventory of 10,000 JIS-compliant items.
Improved corrosion resistance: SUS316 can be used to achieve greater corrosion resistance.
Free sample: We will send you a sample for free.

	JIS standard	Seiki Seisakujyo default standards
Strength	600N/m㎡+	600N/m㎡+
Steel grade	None to note	S50C・SUS316

Comparison table of JIS standard and Seiki Seisakujyo default keys

The material generally used in keys is S45C, but we use S50C, which has greater strength than S45C.

If you require greater strength and corrosion resistance than S50C, we also stock SUS316 as standard.

Our products are compliant with environmental regulatory standards.

New JIS standard (Seiki machine keys)
Dimensions b×h	Compatible shaft diameter Φ	b		h			c
Dimensions b×h	Compatible shaft diameter Φ	Standard Dimensions	Tolerance (h9)		Standard Dimensions	Tolerance	c
2×2	6～8	2	0 -0.025	2	0 -0.025	h9	0.16 ～0.25
3×3	8～10	3	0 -0.025	3	0 -0.025
4×4	10～12	4	0 -0.030	4	0 -0.030
5×5	12～17	5		5			0.25 ～0.40
6×6	17～22	6		6
(7×7)	20～25	7	0 -0.036	7	0 -0.036
8×7	22～30	8		7	0 -0.090	h11
10×8	30～38	10		8			0.40 ～0.60
12×8	38～44	12	0 -0.043	8
14×9	44～50	14		9
(15×10)	50～55	15		10
16×10	50～58	16		10
18×11	58～65	18		11	0 -0.11
20×12	65～75	20	0 -0.052	12			0.60 ～0.80
22×14	75～85	22		14
24×16	80～90	24		16
25×14	85～95	25		14
28×16	95～110	28		16
32×18	110～130	32	0 -0.062	18
(35×22)	125～140	35		22	0 -0.13		1.00 ～1.20
36×20	130～150	36		20
(38×24)	140～160	38		24
40×22	150～170	40		22
(42×26)	160～180	42		26
45×25	170～200	45		25
50×28	200～230	50		28
56×32	230～260	56	0 -0.74	32	0 -0.16		1.60 ～2.00
63×32	260～290	63	0 -0.74	32	0 -0.16		1.60 ～2.00

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