David Nolan
Plastic
- Joined
- Apr 14, 2021
Hi, I'm planning on building my own mill at some point in the future. I'm not buying one because I figure it will be much cheaper to build one with my specificications, I already have a mini mill. I am however a little apprehensive, I've had issues with spindles being slightly out concentricity wise in the past and it caused me a lot of grief. So I want to get a better picture of how to assemble a (practically)perfectly concentric spindle.
I'm unsure of a few things. So my tools are mostly MT3 tapers, what I'm wondering is do most mills have an internally cut taper to mate with a given taper type, presuming they use a Morse tapers that is. Or is the 'socket' just a regular hole that is sized proportionally to the given taper size. Obviously it would be great if a regular hole would do the trick cause it' a lot easier then cutting an internal taper which I would most likely have to outsource.
(I can't use the actual motor spindle as the spindle like on a router because, I need to step down the rpms before it gets to the tool, cheap chinese spindles don't do so good at low speeds and I want low speed for steel)
Second question is about bearings... How on earth do I get the right fit on a bearing so that the concentricity is of a perfect tolerance, I'm most likely going to buy the spindle body and the bearing seperately so how do I ensure a good fit. I feel like I have the wrong idea here, maybe I'm being way to ambitious. Do I buy a tapered spindle or tapered roller bearings or do I need to manually cut the spindle body to the exact right dimension so it perfectly press fits with into the bearing. How would a lay person like myself go about this? Can I buy these together, ready to assemble and where? I live in Ireland... I mean I have nightmares about concentricity. Please give me some advice, cheers.
I'm unsure of a few things. So my tools are mostly MT3 tapers, what I'm wondering is do most mills have an internally cut taper to mate with a given taper type, presuming they use a Morse tapers that is. Or is the 'socket' just a regular hole that is sized proportionally to the given taper size. Obviously it would be great if a regular hole would do the trick cause it' a lot easier then cutting an internal taper which I would most likely have to outsource.
(I can't use the actual motor spindle as the spindle like on a router because, I need to step down the rpms before it gets to the tool, cheap chinese spindles don't do so good at low speeds and I want low speed for steel)
Second question is about bearings... How on earth do I get the right fit on a bearing so that the concentricity is of a perfect tolerance, I'm most likely going to buy the spindle body and the bearing seperately so how do I ensure a good fit. I feel like I have the wrong idea here, maybe I'm being way to ambitious. Do I buy a tapered spindle or tapered roller bearings or do I need to manually cut the spindle body to the exact right dimension so it perfectly press fits with into the bearing. How would a lay person like myself go about this? Can I buy these together, ready to assemble and where? I live in Ireland... I mean I have nightmares about concentricity. Please give me some advice, cheers.