ISO 3912 Woodruff Keys and Keyways

Dimensions	H	d2	l	for shafts d/d1	for shafts d/d1
2	2.6	7	6.76	6 - 8	10 - 12
2	3.7	10	9.66	6 - 8	10 - 12
2.5	3.7	10	9.66	8 - 10	12 - 17
3	3.7	10	9.66	8 - 10	12 - 17
3	5	13	12.65	8 - 10	12 - 17
3	6.5	16	15.72	-	12 - 17
4	5	13	12.65	10 - 12	17 - 22
4	6.5	16	-	10 - 12	17 - 22
4	7.5	19	-	-	17 - 22
5	6.5	16	-	12 - 17	22 - 30
5	7.5	19	-	12 - 17	22 - 30
5	8	22	-	-	22 - 30
6	7.5	19	-	17-22	30 - 38
6	9	22	-	17-22	30 - 38
6	11	28	27.35	-	30 - 38
8	9	22	21.63	22-30	> 38
8	11	28	27.35	22-30	> 38
8	13	32	31.43	-	> 38
10	11	28	27.35	30-38	> 38
10	13	32	31.43	30-38	> 38
10	16	45	43.08	-	> 38