water bottle screw sizing
05-09-12 | 12:18 PM
#4
aka Tom Reingold
Joined: Jan 2009
Posts: 44,338
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From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
I notice that with metric bolts, the diameter implies the thread pitch. There are exceptions, but it seems that 5mm implies 0.8mm pitch and 6mm implies 1mm pitch. Is this correct?
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Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
05-09-12 | 07:39 PM
#5
In ISO metric threading standards, there are coarse, fine (like UNC and UNF for imperial) and even extra-fine. Most of the smaller-diameter threads used on a bike are coarse. A fine 5mm thread has pitch 0.5 mm. Axle threading used on a bike (9 and 10 x 1 or 0.75) is considered fine thread. 35 x 1 mm threading is no doubt extra-extra-fine!
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