projects:bridgeport
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projects:bridgeport [2018/03/25 22:03] – [Lubrication] enleth | projects:bridgeport [2020/01/07 00:01] – [Spindle transmission] enleth | ||
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====== Technical specifications ====== | ====== Technical specifications ====== | ||
+ | ===== Spindle bearings ==== | ||
+ | |||
+ | Main bearings: currently NSK 7207CTRDULP4Y. Previously FAFNIR 207. | ||
+ | |||
+ | Suitable NSK part numbers match '' | ||
+ | |||
+ | If replacement is needed, the requirements are: | ||
+ | * 35x72x17mm (7207) | ||
+ | * angular contact bearings, 15deg contact angle (C) | ||
+ | * any cage material suitable for spindles (TR, TYN, possibly some other options, see NSK designation guides) | ||
+ | * matched pair (D) | ||
+ | * universal or back-to-back arrangement (U, B) | ||
+ | * low or medium preload (L, M) | ||
+ | * ABEC7 or ISO P4 rating, those two are equivalent (P4) | ||
+ | * " | ||
+ | |||
+ | |||
===== Spindle transmission ===== | ===== Spindle transmission ===== | ||
* Minimum center distance - motor shaft to driven shaft: 244.5mm | * Minimum center distance - motor shaft to driven shaft: 244.5mm |