27:
1209:
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1481:
98:
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A new split pin (see figure A) has its flat inner surfaces touching for most of its length so that it appears to be a split cylinder (figure D). Once inserted, the two ends of the pin are bent apart, locking it in place (figure B). When they are removed they are supposed to be discarded and replaced,
164:
The most common type of split pin is the extended prong with a square cut, but extended prongs are available with all of the other types of ends. The extended prong type is popular because the difference in length of the two tines makes it easier to separate them. To ease insertion into a hole the
88:
is sometimes used for a split pin. A further use of the term "cotter pin" is the "crank cotter pin" used to lock bicycle pedal cranks to the bottom bracket axle. These are not "split" at all and are wedge shaped.
124:
Split pins are typically made of soft metal, making them easy to install and remove, but also making it inadvisable to use them to resist strong shear forces. Common materials include
171:
split pins are properly installed by striking the head with a hammer to secure the pin. This forces the shorter tine forward, spreading the pin.
160:
of the split pin is defined as the distance from the end of the shortest tine to the point of the eyelet that contacts the hole.
1462:
1429:
1408:
1485:
156:
Types of ends available on split pins: Standard, extended prong, mitre end, bevel end and hammer lock. The length
1506:
1511:
42:
165:
longer tine may be slightly curved to overlap the tip of the shorter tine or it is beveled.
8:
1501:
118:
1458:
1425:
1404:
62:
31:
1452:
1440:
1419:
1398:
1221:
137:
73:
with a half-circular cross section, split pins come in multiple sizes and types.
20:
1298:
30:
A split pin (UK usage) / cotter pin (USA usage) holding a rod in place with a
1495:
1343:
1253:
1258:
1248:
81:
58:
1273:
1236:
1217:
125:
1225:
1212:
A car hub showing a castellated nut cover and split pin (near center)
1208:
141:
1454:
From
Tinkering to Torquing: A Beginner's Guide to Tractors and Tools
1263:
1232:
54:
26:
152:
329: in. Metric conversions in the table below are approximate.
1480:
1268:
1216:
Split pins are frequently used to secure other fasteners, e.g.
133:
108:
16:
Metal fastener with two tines that are bent during installation
1235:, and provide less strength but easier to install/remove than
129:
97:
66:
70:
1421:
Standard aircraft handbook for mechanics and technicians
1493:
61:that are bent during installation, similar to a
1231:Split pins are cheaper but less reusable than
194:The diameters of split pins are standardized.
1424:(6th ed.), McGraw-Hill Professional,
1417:
1379:
1363:
1361:
1207:
151:
96:
25:
19:For a split pin used in stationery, see
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1336:
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1319:
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1310:
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1316:
112:D: Cross-section of a new split pin
13:
1445:, Reinhold Publication Corporation
1224:, or, infrequently, as a low-tech
14:
1523:
1473:
1400:Interpreting Engineering Drawings
1479:
1418:Reithmaier, Lawrence W. (1999),
84:". To avoid confusion, the term
1203:
92:
1403:(6th ed.), SteinerBooks,
1373:
1304:
1291:
1:
1397:Jensen, Cecil Howard (2001),
1279:
309:American split pins start at
80:" is equivalent to US term "
7:
1242:
76:The British definition of "
10:
1530:
1457:, MBI Publishing Company,
69:. Typically made of thick
18:
343:
340:
337:
333:American split pin sizes
189:
147:
198:Metric split pin sizes
1451:Welsch, Roger (2005),
1439:Soled, Julius (1957),
1213:
161:
113:
105:B: Installed split pin
34:
1299:U.S. patent 4,298,299
1211:
155:
100:
29:
1507:Mechanical fasteners
1488:at Wikimedia Commons
319: in and end at
41:, also known in the
1442:Fasteners handbooks
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199:
1214:
332:
197:
162:
114:
35:
1486:Split cotter pins
1484:Media related to
1464:978-0-7603-2082-2
1431:978-0-07-134836-2
1410:978-0-7668-2897-1
1220:, or to secure a
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1200:
338:Nominal diameter
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203:Nominal diameter
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103:A: New split pin
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1222:castellated nut
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138:stainless steel
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1474:External links
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1393:
1385:
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1382:, p. 151.
1372:
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174:Types include
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121:from bending.
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21:Brass fastener
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213:For bolt size
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1390:Bibliography
1389:
1388:
1375:
1349:, retrieved
1344:
1306:
1293:
1284:
1283:
1259:Hairpin clip
1249:Cotter (pin)
1230:
1215:
1204:Applications
1191:
1175:
1153:
1137:
1115:
1099:
1077:
1061:
1039:
1023:
1005:
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900:31.75, 34.93
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101:Cotter pins:
93:Construction
86:split cotter
85:
77:
75:
50:
46:
38:
36:
1368:Jensen 2001
1345:Cotter pins
1311:Welsch 2005
1237:spring pins
1218:clevis pins
832:25.4, 28.58
292:30, 36, 42
169:Hammer lock
117:because of
1496:Categories
1351:2009-08-17
1326:Soled 1957
1280:References
1274:Spring pin
341:Hole size
126:mild steel
78:cotter pin
51:cotter key
47:cotter pin
1502:Fasteners
1233:linchpins
1226:shear pin
208:Hole size
142:aluminium
57:with two
39:split pin
1264:Linchpin
1243:See also
176:standard
55:fastener
1184:⁄
1168:⁄
1146:⁄
1130:⁄
1108:⁄
1092:⁄
1070:⁄
1054:⁄
1032:⁄
1016:⁄
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978:⁄
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389:⁄
373:⁄
324:⁄
314:⁄
281:24, 28
259:12, 14
119:fatigue
1461:
1428:
1407:
1269:R-clip
184:clinch
180:humped
140:, and
134:bronze
109:R-clip
82:cotter
63:staple
32:washer
1285:Notes
1192:19.05
1176:19.05
1154:15.88
1138:15.88
1116:12.70
1100:12.70
1078:11.11
1062:11.11
1006:44.45
971:7.94
954:38.10
777:19.05
727:15.88
677:12.70
190:Sizes
148:Types
130:brass
67:rivet
59:tines
45:as a
1459:ISBN
1426:ISBN
1405:ISBN
1040:9.53
1024:9.53
986:7.94
934:6.75
918:6.35
866:5.95
850:5.56
811:5.16
795:4.76
761:4.37
745:3.97
711:3.97
695:3.57
661:3.57
645:3.18
623:3.18
607:2.78
589:9.53
573:2.78
557:2.38
539:7.94
523:2.38
507:1.98
489:6.35
473:1.98
457:1.59
435:1.59
419:1.19
397:1.19
381:0.79
182:and
71:wire
815:1,
364:mm
358:mm
352:mm
303:48
300:8.5
289:6.3
278:5.6
270:20
267:4.5
256:3.4
248:10
245:2.8
242:2.5
234:2.4
223:1.9
220:1.5
215:mm
210:mm
205:mm
107:C:
65:or
49:or
1498::
1360:^
1333:^
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1239:.
1228:.
1072:16
1056:16
980:16
966:16
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375:32
361:in
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349:in
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237:8
226:6
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144:.
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132:,
128:,
43:US
37:A
1468:.
1447:.
1435:.
1414:.
1355:.
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1182:3
1170:4
1166:3
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1144:5
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1128:5
1110:2
1106:1
1094:2
1090:1
1068:7
1052:7
1034:8
1030:3
1018:8
1014:3
1000:4
996:3
993:+
991:1
976:5
962:5
948:2
944:1
941:+
939:1
912:4
908:1
894:8
890:3
887:+
885:1
880:4
876:1
873:+
871:1
840:7
826:8
822:1
819:+
817:1
785:3
771:4
767:3
735:5
721:8
717:5
701:5
685:9
671:2
667:1
651:9
639:8
635:1
617:8
613:1
597:7
583:8
579:3
563:7
547:3
529:5
513:3
497:5
483:4
479:1
463:5
447:1
425:1
409:3
387:3
371:1
326:4
322:3
312:1
297:8
286:6
275:5
264:4
253:3
231:2
158:L
23:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
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