Wednesday, December 23, 2009

Reducing the number of skate bearings from 32 to 24 or maybe only 20



Some times some thing is stareing you in the face and yet you dont see it.

Well after two weeks I have seen it by taking just a few 5mm spring washers and 6mm spring washers. I have reduced the number of skate bearings required from 32 down to 24 skate bearings a significant saveing.

You could save 4 more by keeping the 3 and 2 bearing configuration of Mendel.

Im lazy and it was easier to just change 1 block per boggie thus mine are all 3 bearing blocks now. Maybe once its all going I will change the Y axis to be a 3 and a 2 configuration.






Here is the method to make both types the three and the two bearing types.

Three bearing boggies.

Here is how you assemble one:

1 nylon corner block in this order.

1 8mm bolt 1 bearing, 1 nut, 1 bearing, 1 washer, Nylon corner block and a nut.

Using two 4mm screw put thru the two holes of 2 bearing block then put an un modified block on the two screws first block now add two 5mm spring washers on to the 4mm screws then add the next block thats made in this order:

1 bearing, 1 nut, 1 washer, Nylon corner block and a nut.

Add the two nuts to hold the new bogie assembly together.

Two bearing boggies.

Here is how you assemble one:

Make 2 nylon corner block in this order.

1 bearing, 1 nut, 1 washer, Nylon corner block and a nut.

Using two 4mm screw put thru the two holes of 1 bearing block now add two 6mm flat washers on to the 4mm screws then put an un modified block on the two screws then two 6mm flat washers folowed by the second 1 bearing block

Add the two nuts to hold the new bogie assembly together.




The 3 bearing seperation is based on the 5mm spring washers bein 1.3mm - 1.4mm when comppresed spring washers are better as it gives you the ability to loosen or tighten the grip of the skate bearings.

The 2 bearing seperation is based on the 6mm spring washers bein 1.4mm - 2mm when comppresed spring washers are better as it gives you the ability to loosen or tighten the grip of the skate bearings.

New image uploaded for  oiaohm to show how the bevel on the skate bearings works to produce the effect of  3 bearings at 120 degrees this effect definatly provides a slider with much less friction than using the four bearings boggies. I do not know the angle of the bevel maybe it is a 60 degree bevel.



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