File:Watch jewel bearing.svg
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Summary
| Description |
English: Drawing of jewel bearing used in a mechanical watch. The donut-shaped bearing is shown sectioned through its axis. This type is called a 'hole jewel', used for most of the ordinary wheels in the gear train. The bearing (red) is usually made of synthetic sapphire (ruby). It is press-fitted into a hole in the movement's supporting plate (grey). The cup-shaped depression in the top of the jewel is the oil cup; it's purpose is to hold the lubricating oil (yellow) in contact with the bearing shaft by capillary action. In wheels where friction is critical, a 'capstone' (shown in Watch jewel bearing and capstone.svg) is added on the end to prevent the shoulder of the shaft from bearing against the face of the jewel. Information for this drawing came from Henry B. Fried (1954) Bench Practices for Watch and Clockmaker, Arlington Book Co., Virginia, USA, Book 3, Ch. 1, p.140-188 |
| Date | |
| Source | Own work, using Inkscape |
| Author | Chris Burks Chetvorno |
| Permission (Reusing this file) |
I, Chris Burks the author, release this work into the public domain for any use whatever. |
| SVG development |
Licensing
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I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 07:10, 14 July 2008 | | 640 × 420 (16 KB) | Chetvorno | {{Information |Description=Drawing of jewel bearing used in a Wikipedia:mechanical watch. The bearing is sectioned through its axis. This type is called a 'hole jewel' |Source=Own work by uploader |Date=2008-07-13 |Author=Chris Burks [[User:Ch |
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