How to install the end bearing to the lead screw short shaft
From Zen_Toolworks_Wiki
The fit between the end bearing and the lead screw shaft(short side, or other side of the motor) must be tight. It is a little trick (or most tricky part in our assembling process) to make it right. We have mentioned that if you have a drill press, it can make this task easy and accurate. But as a home machinist, most of us don't have a easy access to a industrial size drill press. But don't worry, here is another way of doing it, with basic hand tools and a hammer. We do assume you will have a access to a bench vise, otherwise, you need to find something equivalent.
Here is how:
Figure: 1
Frist, push the bearing into the holding frame, this is also a tight fit, but with a bench vise, it should be very easy. Just make sure that the force applied is balanced and the bearing is in the right position. When you see the bearing cut into the side of the hole, something is wrong. Back it out and realign them.
Figure: 1
Frist, push the bearing into the holding frame, this is also a tight fit, but with a bench vise, it should be very easy. Just make sure that the force applied is balanced and the bearing is in the right position. When you see the bearing cut into the side of the hole, something is wrong. Back it out and realign them.|thumb|m|none|
Figure: 2
Apply an even force and do it slowly, reposition it if necessary.
Figure: 1
Frist, push the bearing into the holding frame, this is also a tight fit, but with a bench vise, it should be very easy. Just make sure that the force applied is balanced and the bearing is in the right position. When you see the bearing cut into the side of the hole, something is wrong. Back it out and realign them.|thumb|m|none|
Figure: 2
Apply an even force and do it slowly, reposition it if necessary.|thumb|m|none|
Figure: 3
Now, we have successfully push the bearing into the #3 holding frame.
Figure: 1
Frist, push the bearing into the holding frame, this is also a tight fit, but with a bench vise, it should be very easy. Just make sure that the force applied is balanced and the bearing is in the right position. When you see the bearing cut into the side of the hole, something is wrong. Back it out and realign them.|thumb|m|none|
Figure: 2
Apply an even force and do it slowly, reposition it if necessary.|thumb|m|none|
Figure: 3
Now, we have successfully push the bearing into the #3 holding frame.|thumb|m|none|
Figure: 4
Let's prepare the lead screw. We need a M8 nut, with 1.25 pitch, which will hold the leadscrew in a vise
Figure: 1
Frist, push the bearing into the holding frame, this is also a tight fit, but with a bench vise, it should be very easy. Just make sure that the force applied is balanced and the bearing is in the right position. When you see the bearing cut into the side of the hole, something is wrong. Back it out and realign them.|thumb|m|none|
Figure: 2
Apply an even force and do it slowly, reposition it if necessary.|thumb|m|none|
Figure: 3
Now, we have successfully push the bearing into the #3 holding frame.|thumb|m|none|
Figure: 4
Let's prepare the lead screw. We need a M8 nut, with 1.25 pitch, which will hold the leadscrew in a vise|thumb|m|none|
Figure: 5
Screw the M8 nut to the lead screw, on short shaft end.
Figure: 1
Frist, push the bearing into the holding frame, this is also a tight fit, but with a bench vise, it should be very easy. Just make sure that the force applied is balanced and the bearing is in the right position. When you see the bearing cut into the side of the hole, something is wrong. Back it out and realign them.|thumb|m|none|
Figure: 2
Apply an even force and do it slowly, reposition it if necessary.|thumb|m|none|
Figure: 3
Now, we have successfully push the bearing into the #3 holding frame.|thumb|m|none|
Figure: 4
Let's prepare the lead screw. We need a M8 nut, with 1.25 pitch, which will hold the leadscrew in a vise|thumb|m|none|
Figure: 5
Screw the M8 nut to the lead screw, on short shaft end.|thumb|m|none|
Figure: 6
Use the bench vise to hold the M8 nut and lead screw in position as shown.
Figure: 1
Frist, push the bearing into the holding frame, this is also a tight fit, but with a bench vise, it should be very easy. Just make sure that the force applied is balanced and the bearing is in the right position. When you see the bearing cut into the side of the hole, something is wrong. Back it out and realign them.|thumb|m|none|
Figure: 2
Apply an even force and do it slowly, reposition it if necessary.|thumb|m|none|
Figure: 3
Now, we have successfully push the bearing into the #3 holding frame.|thumb|m|none|
Figure: 4
Let's prepare the lead screw. We need a M8 nut, with 1.25 pitch, which will hold the leadscrew in a vise|thumb|m|none|
Figure: 5
Screw the M8 nut to the lead screw, on short shaft end.|thumb|m|none|
Figure: 6
Use the bench vise to hold the M8 nut and lead screw in position as shown.|thumb|m|none|
Figure: 6
Position the #3 with bearing on top of the screw shaft.
Figure: 1
Frist, push the bearing into the holding frame, this is also a tight fit, but with a bench vise, it should be very easy. Just make sure that the force applied is balanced and the bearing is in the right position. When you see the bearing cut into the side of the hole, something is wrong. Back it out and realign them.|thumb|m|none|
Figure: 2
Apply an even force and do it slowly, reposition it if necessary.|thumb|m|none|
Figure: 3
Now, we have successfully push the bearing into the #3 holding frame.|thumb|m|none|
Figure: 4
Let's prepare the lead screw. We need a M8 nut, with 1.25 pitch, which will hold the leadscrew in a vise|thumb|m|none|
Figure: 5
Screw the M8 nut to the lead screw, on short shaft end.|thumb|m|none|
Figure: 6
Use the bench vise to hold the M8 nut and lead screw in position as shown.|thumb|m|none|
Figure: 6
Position the #3 with bearing on top of the screw shaft.|thumb|m|none|
Figure: 7
Find a screw with proper diameter and use it as a puncher.
Figure: 1
Frist, push the bearing into the holding frame, this is also a tight fit, but with a bench vise, it should be very easy. Just make sure that the force applied is balanced and the bearing is in the right position. When you see the bearing cut into the side of the hole, something is wrong. Back it out and realign them.|thumb|m|none|
Figure: 2
Apply an even force and do it slowly, reposition it if necessary.|thumb|m|none|
Figure: 3
Now, we have successfully push the bearing into the #3 holding frame.|thumb|m|none|
Figure: 4
Let's prepare the lead screw. We need a M8 nut, with 1.25 pitch, which will hold the leadscrew in a vise|thumb|m|none|
Figure: 5
Screw the M8 nut to the lead screw, on short shaft end.|thumb|m|none|
Figure: 6
Use the bench vise to hold the M8 nut and lead screw in position as shown.|thumb|m|none|
Figure: 6
Position the #3 with bearing on top of the screw shaft.|thumb|m|none|
Figure: 7
Find a screw with proper diameter and use it as a puncher.|thumb|m|none|
Figure: 8
Slowly knock the bearing into the shaft with a hammer.
Figure: 1
Frist, push the bearing into the holding frame, this is also a tight fit, but with a bench vise, it should be very easy. Just make sure that the force applied is balanced and the bearing is in the right position. When you see the bearing cut into the side of the hole, something is wrong. Back it out and realign them.|thumb|m|none|
Figure: 2
Apply an even force and do it slowly, reposition it if necessary.|thumb|m|none|
Figure: 3
Now, we have successfully push the bearing into the #3 holding frame.|thumb|m|none|
Figure: 4
Let's prepare the lead screw. We need a M8 nut, with 1.25 pitch, which will hold the leadscrew in a vise|thumb|m|none|
Figure: 5
Screw the M8 nut to the lead screw, on short shaft end.|thumb|m|none|
Figure: 6
Use the bench vise to hold the M8 nut and lead screw in position as shown.|thumb|m|none|
Figure: 6
Position the #3 with bearing on top of the screw shaft.|thumb|m|none|
Figure: 7
Find a screw with proper diameter and use it as a puncher.|thumb|m|none|
Figure: 8
Slowly knock the bearing into the shaft with a hammer.|thumb|m|none|
Figure: 9
finally, use a punch with thinner head to push the bearing flash to the leadscrew shoulder.
Figure: 1
Frist, push the bearing into the holding frame, this is also a tight fit, but with a bench vise, it should be very easy. Just make sure that the force applied is balanced and the bearing is in the right position. When you see the bearing cut into the side of the hole, something is wrong. Back it out and realign them.|thumb|m|none|
Figure: 2
Apply an even force and do it slowly, reposition it if necessary.|thumb|m|none|
Figure: 3
Now, we have successfully push the bearing into the #3 holding frame.|thumb|m|none|
Figure: 4
Let's prepare the lead screw. We need a M8 nut, with 1.25 pitch, which will hold the leadscrew in a vise|thumb|m|none|
Figure: 5
Screw the M8 nut to the lead screw, on short shaft end.|thumb|m|none|
Figure: 6
Use the bench vise to hold the M8 nut and lead screw in position as shown.|thumb|m|none|
Figure: 6
Position the #3 with bearing on top of the screw shaft.|thumb|m|none|
Figure: 7
Find a screw with proper diameter and use it as a puncher.|thumb|m|none|
Figure: 8
Slowly knock the bearing into the shaft with a hammer.|thumb|m|none|
Figure: 9
finally, use a punch with thinner head to push the bearing flash to the leadscrew shoulder.|thumb|m|none|
Figure: 10
Here we can take it off the bench
Figure: 1
Frist, push the bearing into the holding frame, this is also a tight fit, but with a bench vise, it should be very easy. Just make sure that the force applied is balanced and the bearing is in the right position. When you see the bearing cut into the side of the hole, something is wrong. Back it out and realign them.|thumb|m|none|
Figure: 2
Apply an even force and do it slowly, reposition it if necessary.|thumb|m|none|
Figure: 3
Now, we have successfully push the bearing into the #3 holding frame.|thumb|m|none|
Figure: 4
Let's prepare the lead screw. We need a M8 nut, with 1.25 pitch, which will hold the leadscrew in a vise|thumb|m|none|
Figure: 5
Screw the M8 nut to the lead screw, on short shaft end.|thumb|m|none|
Figure: 6
Use the bench vise to hold the M8 nut and lead screw in position as shown.|thumb|m|none|
Figure: 6
Position the #3 with bearing on top of the screw shaft.|thumb|m|none|
Figure: 7
Find a screw with proper diameter and use it as a puncher.|thumb|m|none|
Figure: 8
Slowly knock the bearing into the shaft with a hammer.|thumb|m|none|
Figure: 9
finally, use a punch with thinner head to push the bearing flash to the leadscrew shoulder.|thumb|m|none|
Figure: 10
Here we can take it off the bench|thumb|m|none|
Figure: 10
A final look of the #3, bearing and leadscrew.
If the fit between bearing and shaft is too loose, you can use a punch make a din on the shaft to make it tight again. If it is too tight, you can sand off a little bit on the shaft.
Now, with this part completed, the rest of work will be really easy, but please still check the instruction and do it slowly. You only do it once and the machine will serve you for a long time.
