MWF FEED
4th March 2022, 08:10 PM
Old Italian cylindrical grinder. Dirty, but nothing seems to be seized.
Has a 125mm TOA chuck on some sort of rough backplate. Runout is large. Too large to use this as a cylindrical grinder, so chuck has to come off, except that we can't work out how!!!
IMG_2679.jpg (https://metalworkforums.com/attachment.php?attachmentid=397392&d=1646383065)
Behind the back plate is a driving plate for the spindle. It is somehow loosely keyed into the spindle (i.e. you can turn it a few degrees before the spindle moves). There is a gap between them. The spindle diameter in there looks like 25mm. It doesn't seem sturdy enough to hammer wedges between the two.
Other end of the spindle has a drawbar. Here is its nut:
IMG_2680.jpg (https://metalworkforums.com/attachment.php?attachmentid=397393&d=1646383646)
Drawbar is 16mm diameter, about 1mm pitch. Unscrewing it gives a rattling bar, still retained in the spindle somehow!
We are assuming that the chuck+backplate is a taper (MT4?), and that the drawbar tightens it into the spindle's taper, but bashing the drawbar with a hammer had some nothing.
Anyone ever used one of these?
Attached Images
https://metalworkforums.com/images/attach/jpg.gif IMG_2679.jpg (https://metalworkforums.com/attachment.php?attachmentid=397392&d=1646383065) (176.8 KB)
https://metalworkforums.com/images/attach/jpg.gif IMG_2680.jpg (https://metalworkforums.com/attachment.php?attachmentid=397393&d=1646383646) (203.7 KB)
Read the full thread at metalworkforums.com... (https://metalworkforums.com/showthread.php?t=207832&goto=newpost)
Has a 125mm TOA chuck on some sort of rough backplate. Runout is large. Too large to use this as a cylindrical grinder, so chuck has to come off, except that we can't work out how!!!
IMG_2679.jpg (https://metalworkforums.com/attachment.php?attachmentid=397392&d=1646383065)
Behind the back plate is a driving plate for the spindle. It is somehow loosely keyed into the spindle (i.e. you can turn it a few degrees before the spindle moves). There is a gap between them. The spindle diameter in there looks like 25mm. It doesn't seem sturdy enough to hammer wedges between the two.
Other end of the spindle has a drawbar. Here is its nut:
IMG_2680.jpg (https://metalworkforums.com/attachment.php?attachmentid=397393&d=1646383646)
Drawbar is 16mm diameter, about 1mm pitch. Unscrewing it gives a rattling bar, still retained in the spindle somehow!
We are assuming that the chuck+backplate is a taper (MT4?), and that the drawbar tightens it into the spindle's taper, but bashing the drawbar with a hammer had some nothing.
Anyone ever used one of these?
Attached Images
https://metalworkforums.com/images/attach/jpg.gif IMG_2679.jpg (https://metalworkforums.com/attachment.php?attachmentid=397392&d=1646383065) (176.8 KB)
https://metalworkforums.com/images/attach/jpg.gif IMG_2680.jpg (https://metalworkforums.com/attachment.php?attachmentid=397393&d=1646383646) (203.7 KB)
Read the full thread at metalworkforums.com... (https://metalworkforums.com/showthread.php?t=207832&goto=newpost)