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Technical Information

INDEX of THREAD DATA CHARTS

CEI - CYCLE ENGINEERING INSTITUTION THREAD CHART

Bicycle Screw Thread DIN 79012

Cycle Engineer Institution Thread, used in the British bicycle industry.
Major Diameter
Inch
Major Diameter
mm
Tapping Drill
Size
mm
TPI Pitch
mm
0.056 1.422 0.965 62 0.409
0.064 1.626 1.190 62 0.409
0.072 1.829 1.393 62 0.409
0.080 2.032 1.596 62 0.409
0.092 2.337 1.854 56 0.453
0.104 2.642 2.642 44 0.577
0.125 3.175 2.499 40 0.635
0.154 3.912 3.236 40 0.635
0.175 4.445 3.600 32 0.794
0.187 4.762 3.917 32 0.794
0.250 6.350 5.309 26 0.977
0.266 6.756 5.715 26 0.977
0.281 7.137 6.096 26 0.977
0.312 7.937 6.896 26 0.977
0.375 9.525 8.484 26 0.977
0.562 14.287 12.287 20 1.270
1.000 25.400 24.359 26 0.977
1.290 32.766 31.639 24 1.058
1.370 34.797 33.670 24 1.058
1.437 36.512 35.385 24 1.058
1.500 38.100 36.973 24 1.058
CEI Thread
 

Disclaimer
This data is provided for general information only. The intention is to provide accurate information; regardless; errors may exist in the supplied information. If accuracy is critical, base your final decisions on the data provided in the root document; which is a copyrighted document. To purchase a copy visit an Authorized Reseller.

Comments:
Original Posting: 2/28/2008
Last Revision: 2/13/2013
Error corrections in, or comments about, the above data can be sent to: gageguy@gagecrib.com

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