All these extra washers???

Hi all

I have 16 washers left after my carriage build.

On closer inspection I see the lower carriage assembly has 5 washers on the 4 diagonal bearings.

What is the purpose of these extra washers??

Can someone please clarify.

The bolts used don't have a thread all the way to the head. They have a "shoulder" that is 4mm diameter, whereas the M4 thread OD is a little bit less than that. Over long bolts are used so that the shoulder is long enough to go through the 4mm bearing, so that it is on a 4mm shaft rather than being loose on a slightly smaller thread. The washers are needed so that the nuts end up on the threaded area. Depending on your bolts and the washers you may need more or less.

While it gives a good fit for the bearing and standardises the bolts, I prefer shorter bolts as it is a pain tightening Nylocs over that length and some clashed with my modified extruder design.

Edited 1 time(s). Last edit at 06/12/2010 07:27AM by nophead.

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I use Locite 243 and this kind of bolt:

They work fine so far, except for the middle bolt on x-180-z-bearing-plate, as there's not enough space for the proper tools.