The bearings on mine are a very close push-on fit, so no 'persuation' was necessary. Luck of the draw I guess.
Another Proxxon Modification.
- Thread starter Stuart Little
- Start date
- Watchers 4
Thank you Stephan. I will made the modification in the next few weeks. I want to to finish my Belem structure before beginning the masts and rigging. I will take a look on yout thread about the subject too before removing the bearing.
Have a good day,
Michel
Have a good day,
Michel
Further to Mf 70 Proxxon Mill Spindle Mod to ER11 Collets - Apologies for the delay posting.
The install is very straightforward but I had one gotcha involving the removal of the original Proxxon drive collar. The collar is retained by a 3mm Phillips Head which rounded first try and had to be drilled out.
This isn’t really a problem as the intention is for the original spindle to be discarded but I used an 2mm easy out to remove the remaining part of the screw after I removed the original spindle so as to retain the original as a spare.
When fitting the new spindle, I used a new 3mm Hex socket head machine screw to replace the OEM Phillips Head - just a heads up as it isn’t part of the kit. The offending screw is shown in the instruction sheet photo step 5.
Photo 1 - Instruction sheet – see step 5 and 10 for a better view of the retaining screw and drive grommet.
Photo 2 - shows the original Proxxon Spindle, bearings and the Drive collar. I was pretty disappointed to note the pitting and rough machining of the original spindle in what is a new and not inexpensive machine, especially when compared with the kit spindle machining shown in photo 3.
Photo 3 - Kit contents – note the lower ball race is already pressed in place on the new spindle. Also note the instructions don’t mention the obvious ie that the old bearings have to be removed.
Photo 4 - shows the Hex Head Machine screws used to retain the motor so why didn’t they use one for the drive collar retainer instead of a Phillips head??
Photo 5 – Comparison of Collet holders and old bits removed. The black plastic drive collar is shown but there is a more flexible grommet not shown which press fits over the top of the drive collar
Photo 6 - New spindle installed with collet holder and a 5mm collet. The first run was noticeably quieter with no discernible runout. Very happy so far.
Photo 7 – Range of ER 11 collets 1mm – 7mm. Bought these on Banggood for just under $40 and despite the homey labels they were nicely machined and supplied in individual oil filled plastic bags. Comparison of the 3mm Proxxon to the 3mm ER11 collet.
When using the larger mill bits, one has to have regard to the limited torque available and take shallower cuts but to me this is a easy limitation to accept for the far greater Type and range of standard milling bits available to the ER11 collets than the 3.2mm Proxxon max.
The web page for the manufacturer of these kits is www.usovo.de . They were great to deal with and for me offered value for money at 91euro. There are two versions available for mill serial numbers above or below serial 22852. They also offer a beautiful planetary reduction gearbox for the earlier serials to give more torque for the larger mill bits – would love one for mine, a later serial, but not in the works at the moment unfortunately.
Hope this is of use to others. Cheers.
The install is very straightforward but I had one gotcha involving the removal of the original Proxxon drive collar. The collar is retained by a 3mm Phillips Head which rounded first try and had to be drilled out.
This isn’t really a problem as the intention is for the original spindle to be discarded but I used an 2mm easy out to remove the remaining part of the screw after I removed the original spindle so as to retain the original as a spare.
When fitting the new spindle, I used a new 3mm Hex socket head machine screw to replace the OEM Phillips Head - just a heads up as it isn’t part of the kit. The offending screw is shown in the instruction sheet photo step 5.
Photo 1 - Instruction sheet – see step 5 and 10 for a better view of the retaining screw and drive grommet.
Photo 2 - shows the original Proxxon Spindle, bearings and the Drive collar. I was pretty disappointed to note the pitting and rough machining of the original spindle in what is a new and not inexpensive machine, especially when compared with the kit spindle machining shown in photo 3.
Photo 3 - Kit contents – note the lower ball race is already pressed in place on the new spindle. Also note the instructions don’t mention the obvious ie that the old bearings have to be removed.
Photo 4 - shows the Hex Head Machine screws used to retain the motor so why didn’t they use one for the drive collar retainer instead of a Phillips head??
Photo 5 – Comparison of Collet holders and old bits removed. The black plastic drive collar is shown but there is a more flexible grommet not shown which press fits over the top of the drive collar
Photo 6 - New spindle installed with collet holder and a 5mm collet. The first run was noticeably quieter with no discernible runout. Very happy so far.
Photo 7 – Range of ER 11 collets 1mm – 7mm. Bought these on Banggood for just under $40 and despite the homey labels they were nicely machined and supplied in individual oil filled plastic bags. Comparison of the 3mm Proxxon to the 3mm ER11 collet.
When using the larger mill bits, one has to have regard to the limited torque available and take shallower cuts but to me this is a easy limitation to accept for the far greater Type and range of standard milling bits available to the ER11 collets than the 3.2mm Proxxon max.
The web page for the manufacturer of these kits is www.usovo.de . They were great to deal with and for me offered value for money at 91euro. There are two versions available for mill serial numbers above or below serial 22852. They also offer a beautiful planetary reduction gearbox for the earlier serials to give more torque for the larger mill bits – would love one for mine, a later serial, but not in the works at the moment unfortunately.
Hope this is of use to others. Cheers.