Finally upgraded the Sieg SC3 from a 3" flanged spindle to 4" flanged spindle. At least I regain the 3/4" back from not having to use a 3" to 4" adapter backplate, that was so annoying! Glad I ordered when I did as it is now shown as "out of stock, back ordered".
Ordered Wednesday last week (11th sept) arrived this morning (16th Sept). Quick international shipping at its best.
For those wondering, yes, it was from LittleMachineShop.com (L.M.S),
part# 5579 (<<< LINK) on the website.
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Photos of the fitted 4" flange spindle. As can be seen in the below phots, the original 3" flanged spindle is coated in storage oil, wrapped and sealed in a plastic outer bag.
The Red dykem line is a single centre-punch mark to indicate where a 4 bolt chuck lines up with the two top bolts level when the marks is at TDC, the Blue dykem mark is two centre-punch marks to indicate where a three bolt chuck mounts up with a single bolt at the top when the mark is at TDC. It should be that the blue is for the 4 bolt and red for three bolt chucks, so it needs changing. It is based on a simple map of red has 3 letters, blue has 4 letters, so red = 3 bolt and blue = 4 bolt. It is a simple but effective way to just glance, clock the spindle and then mount the chuck without having to think about it.
Each chuck also has a centre-punch mark/s that align/s with the spindle marks, only added once all possible positions have been checked and the best balance is achieved.
Yes, the flange of the new spindle has a coating of oil to protect it between uses. It gets wiped off before a chuck is mounted.
Already had the ER32 faceplate and 4JIP on it after it was fitted, finishing up a part was working on (Nothing worthy of a post TBF)
4" flange certainly makes life easier, just need to source the allen grub screws and nuts for all the chucks now. Previously with the adapter, it was a case of swapping the adapter, using SHCS to secure the chuck to the adapter befoire fitting to the spindle. A lot of messing around that would eat up time I would rather spend on the project at hand.
*** EDIT TO ADD PHOTS ***