How to make rollers for grinder

In the design of this grinding machine, an important place is given to rollers or rollers. The drive roller sets the abrasive belt in motion, the tension roller picks up the slack, the driven rollers hold and impart uniform tension to the abrasive belt.
The rollers should be light, durable, and the surface should be smooth. You can make them yourself and you don’t need to be a professional.
How to make rollers for grinder

Required


To make rollers you will need the following materials and products:
  • multilayer plywood;
  • sealed ball bearings;
  • tube of wood glue;
  • bolts, washers and nuts;
  • plastic pipes.

We will carry out the work using the following tools and devices: a circular, circular and jigsaw, a drilling and lathe, a file and sandpaper, a hammer and wrenches, a device for centering squares, etc.

The process of making grinder rollers


Using a circular saw, we cut the multilayer plywood into six rectangular fragments, the long side of which is exactly twice as large as the shorter side.
We mark with a pencil using a device for centering square blanks the middle of the halves of rectangular fragments and mark the found centers with a center punch.
How to make rollers for grinder

We make blind holes for ball bearings on a drilling machine using a Forstner drill.
How to make rollers for grinder

Then, using a core drill of a larger diameter, we obtain two round disks from each rectangular fragment.
How to make rollers for grinder

Using a hammer and a piece of multi-layer plywood, we press sealed ball bearings flush into the blind holes.
How to make rollers for grinder

We make through holes in all disks in the center with a drill with a diameter corresponding to the size of the inner ring of the bearings.
How to make rollers for grinder

We thread three round disks onto the bolt and washer using glue. We place a wide washer on top and tighten the block with wrenches and leave it until the glue hardens.
How to make rollers for grinder

How to make rollers for grinder

Next, unscrew the nut and remove the tightening bolt. Now we have at our disposal three monoblocks with bearings pressed into the outer disks.
Using a pendulum saw, we cut three pieces from a plastic pipe of the required diameter, equal in length to the height of monoblocks of three disks made of multi-layer plywood.
How to make rollers for grinder

We grind the side surfaces of the monoblocks, securing them in the chuck of a drilling machine, first with a roughing file, then with sandpaper, to the inner diameter of the pieces of plastic pipe, controlling the turning with a caliper.
How to make rollers for grinder

We press the turned monoblocks with bearings at the ends into pieces of plastic pipes, using the tool feed mechanism of the drilling machine as a press. If the process is difficult, lightly sand the side surface of the monoblock with sandpaper.
How to make rollers for grinder

We remove the bolts and our tension and driven disks are almost ready.Once again we check the pressing of the bearings and, if necessary, seat them. We process the ends of the rollers on a grinder.
How to make rollers for grinder

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Comments (2)
  1. Evgeniy Nikolaevich Zetyukov
    #1 Evgeniy Nikolaevich Zetyukov Guests January 2, 2020 08:19
    5
    Yes, they will melt in ten minutes.
  2. Ivan Petrovich Ageev
    #2 Ivan Petrovich Ageev Guests 4 April 2020 16:31
    5
    Accuracy - none.