What Is a Split Pin?

A split pin is a mechanical part. To avoid damaging the hole wall, grease can be added to the pin hole. To make this part, high-quality steel and rigid materials with good elasticity are required.

Used to prevent loosening of threaded connections. After the nut is tightened, insert the cotter pin into the nut groove and the hole at the end of the bolt, and pull the cotter pin away to prevent the nut and bolt from rotating relatively.

The cotter pin standard is GB / T91-2000.

The standard range of cotter pins is 0.6 to 20mm.

Toughness: Each foot of the split pin should be able to withstand repeated bending without breaking or cracking in the bent part.

Bending method: Pull the cotter pin apart and clamp any of its straight legs in the inspection mold (squeezing should not occur); then bend the cotter pin 90 °, once for each round trip. The test speed should not exceed 60 times / min. Inspection mold should be made

Specifications (nominal specifications)	d max	d minimum	a max	b	c max	Product specifications l	Bolt diameter used>	Bolt diameter	U-shaped pin diameter>	U-shaped pin diameter	100mm long mass / kg	Reference price
0.6	0.5	0.4	1.6	2	1	4 ~ 12	-	2.5	-	2	0.0004	4-280
0.8	0.7	0.6	1.6	2.4	1.4	5 ~ 16	2.5	3.5	2	3	0.0004	4-280
1	0.9	0.8	1.6	3	1.8	6 ~ 20	3.5	4.5	3	4	0.0007	4-280
1.2	1.0	0.9	2.5	3	2	8 ~ 25	4.5	5.5	4	5	No	4-280
1.6	1.4	1.3	2.5	3.2	2.8	8 ~ 32	5.5	7	5	6	0.0016	4-280
10	9.5	9.3	6.3	20	19	45 ~ 200	56	80	44	69	No	4-280
13	12.4	12.1	6.3	26	24.8	71`250	80	120	69	110	No	4-280
16	15.4	15.1	6.3	32	30.8	112 ~ 280	120	170	-	160	No	4-280
2	1.8	1.7	2.5	4	3.6	10 ~ 40	7	9	6	8	0.0033	4-280
2.5	2.3	2.1	2.5	5	4.6	12 ~ 50	9	11	8	3	0.005	4-280
20	19.3	19.0	6.3	40	38.5	160 ~ 280	170	-	160	-	No	4-280
3.2	2.9	2.7	3.2	6.4	5.8	14 ~ 63	11	14	9	12	0.0054	4-280
4	3.7	3.5	4	8	7.4	18 ~ 80	14	20	12	17	0.01	4-280
5	4.6	4.4	4	10	9.2	22 ~ 100	20	27	17	twenty three	0.017	4-280
6.3	5.9	5.7	4	12.6	11.8	32 ~ 125	27	39	twenty three	29	0.023	4-280
8	7.5	7.3	4	16	15	40 ~ 160	39	56	29	44	0.041	4-280

1. The split pin used should not be broken, cracked, rusted, etc .;

2.The nominal size of the split pin should be equal to that of the split pin hole.

1. Insert the cotter pin into the cylindrical pin with your hand or pliers. Do not drive the cotter pin with a hammer.

2. Open the cotter pin with a screwdriver.

3. The angle of the split pin is 60 ° in principle. If it collides with the workpiece, it can be rolled up.

4. When the cotter pin is opened, pay attention to make the separated part straight and symmetrical. R-shaped and neutral positions are not allowed.

5. When fixing the slotted nut, the opening angle of the cotter pin is 60 ° in principle, and it should be twisted appropriately for several turns. But if there are obstacles around or insulation distance is not enough, roll up the split pin.