Re-create a rotary bore punch handle

[a smile]

The hexagon punch tool made some time ago is feasible to actually use, but because of the small Angle, each use needs to adjust the small drag plate to increase the bias Angle, and recently more use, so I am determined to make a new one.

First make an auxiliary tool (eccentric clamp)

This time the eccentricity is set to 2.2 degrees

 

[Arbutus]

Thats interesting! What does the complete tool look like ?

Don

 

[a smile]

Thats interesting! What does the complete tool look like ?

Don

I don't think I can show the whole thing right now because I'm still working on it. I spent almost an afternoon driving a short shaft with a diameter of 25mm and a thick-walled steel pipe with a larger diameter. They are then pressed together by a press and welded together for reinforcement.

Now put it in the casing with the deflection Angle and start turning the large diameter steel pipe part.
With the increase in the frequency of using the lathe, I think my operating technique has improved greatly. The dimensions of the inner and outer diameter are very accurate, especially the inner diameter reaches the predetermined 42.00+0.01mm, which allows the bearing to be installed smoothly and maintain good working condition. Also, the surface finish is very good. This is my best inside diameter turning and I hope to keep it that way.

I thought I needed to give up playing catch-up and that it would be better to move the production process along quietly, which would allow me to avoid major errors.
I'll show you the final structure, and thanks for your concern, I think it'll be a good tool, so I'd like to share it with you.

 

[140mower]

I don't think I can show the whole thing right now because I'm still working on it. I spent almost an afternoon driving a short shaft with a diameter of 25mm and a thick-walled steel pipe with a larger diameter. They are then pressed together by a press and welded together for reinforcement.

Now put it in the casing with the deflection Angle and start turning the large diameter steel pipe part.View attachment 42003
With the increase in the frequency of using the lathe, I think my operating technique has improved greatly. The dimensions of the inner and outer diameter are very accurate, especially the inner diameter reaches the predetermined 42.00+0.01mm, which allows the bearing to be installed smoothly and maintain good working condition. Also, the surface finish is very good. This is my best inside diameter turning and I hope to keep it that way.
View attachment 42004View attachment 42005View attachment 42006
I thought I needed to give up playing catch-up and that it would be better to move the production process along quietly, which would allow me to avoid major errors.View attachment 42007
I'll show you the final structure, and thanks for your concern, I think it'll be a good tool, so I'd like to share it with you.

I'm pretty sure that if you are making it, it's going to not be a good tool....... It's going to be a great one. Looking forward to seeing the finished product, it might even get me going on my rotary broach project.

 

[Dabbler]

@a smile I really like it! I can't wait for seeing the rest of it!

 

[Matt-Aburg]

I don't think I can show the whole thing right now because I'm still working on it. I spent almost an afternoon driving a short shaft with a diameter of 25mm and a thick-walled steel pipe with a larger diameter. They are then pressed together by a press and welded together for reinforcement.

Now put it in the casing with the deflection Angle and start turning the large diameter steel pipe part.View attachment 42003
With the increase in the frequency of using the lathe, I think my operating technique has improved greatly. The dimensions of the inner and outer diameter are very accurate, especially the inner diameter reaches the predetermined 42.00+0.01mm, which allows the bearing to be installed smoothly and maintain good working condition. Also, the surface finish is very good. This is my best inside diameter turning and I hope to keep it that way.
View attachment 42004View attachment 42005View attachment 42006
I thought I needed to give up playing catch-up and that it would be better to move the production process along quietly, which would allow me to avoid major errors.View attachment 42007
I'll show you the final structure, and thanks for your concern, I think it'll be a good tool, so I'd like to share it with you.

nice finish !!!

 

[a smile]

It took about five hours to make the shaft, the cap, and a bearing inner sleeve.


Then today I will go to the store to test my production and I hope it will work perfectly.

 

[140mower]

Then today I will go to the store to test my production and I hope it will work perfectly.

I have full confidence in your workmanship...... Looking forward to seeing pictures of the results.

 

[a smile]

I have full confidence in your workmanship...... Looking forward to seeing pictures of the results.

Thank you for your high expectations. Recently, I have been busy and forgot to take photos. Fortunately, my phone recorded some test videos. I will take photos of the finished inner hole tomorrow! Don!

 

[a smile]

I will continuously make a small batch to test the durability of the handle and determine whether the bearing structure is reasonable.

 

[a smile]

I think I need some help with the rotary punch.
I also made a punch handle some time ago, because of the short time, I did not carefully turn the inner hole, resulting in the bearing position size is too large, so the bearing will have some movement, and then extended to the far edge position will have more difficult to shake.
According to the conventional theory, a larger size deviation will cause some problems in the operation of the equipment, such as durability, machining accuracy or increased tool wear. But I found an interesting problem in the process of using it: it seems that a larger size deviation makes the punch handle easier to use because it has plenty of wiggle room, which makes it easier to find the center of the reserved hole at the moment of rotation. I don't know if my speculation is correct, I hope to get a sure answer from the forum mechanic.
Because the bearings of the rotary punch handle I made recently are closely matched, but the hexagonal holes punched out have obvious traces of deviation from the center. (Also because I didn't set the knife very carefully). So, I need to know if a larger bearing shake is a worthwhile solution?