Bracket for pressing the glass against the gears for sand polisher

thingiverse

After prolonged operation of my sand polisher, the problem of the glass jumping off the guide gears due to the axially opposing force occurred again and again. As a result, the gear ring is no longer in the groove and the drive gear slips. Prolonged and unattended operation is thus excluded. To solve this problem I have thought of two designs. One is a bearing that presses along the axis of rotation on the bottom of the glass to prevent it from slipping backwards (https://www.thingiverse.com/thing:4850834). On the other hand a bracket which encloses the whole glass and presses (via two bearings) the glass against the gear wheels. I have designed here a bracket with two 608 zz bearings that fits the already existing mounting points of reittecs housing. The height and thus the contact pressure can be varied via two slotted holes. <b>This seems to have solved both problems once and for all.</b> I have designed the bracket specifically for the 170 mm version of the IKEA glass. The upper part consists of two halves between the 608 ZZ bearings are placed. The upper part is held together with 5x M3 x 20 mm cylinder head screws. In the design, I tried to find a balance between the flexibility of the construction and the stiffness in order to prevent fatigue fractures. The two supports for the bracket are attached directly to the outer part of the housing. I have chosen the mounting points so that the originally intended four holes to connect the two halves of the housing can still be used for this purpose. 4x M3 x 25 mm, 4x M3 washers and 4x M3 self-locking nuts are needed here for fastening. The upper bracket can be attached to the two supports via two slotted holes. <b>The contact pressure can be variably changed via this.</b> My make of reittecs polisher: https://www.thingiverse.com/make:930670 <b>Visit my website for more information: [www.science-feles.de](https://science-feles.de/2021/05/08/improvements-of-my-sand-polisher/ "www.science-feles.de"). <b>I would be very happy about a [Tip](https://www.paypal.com/donate?hosted_button_id=33A3BXW43NW42 "Tip"). <b>Check out my other designs for the lab: [Cochrane lab designs](https://www.thingiverse.com/zefram_cochrane/collections/cochranes-lab "Cochrane lab designs"). > --------------------------------------------------------- > Ceterum censeo martem esse abeundum. > ---------------------------------------------------------