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| Hex holes |
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| Trebor:
Well I only have a myford s7 and I need to machine a hex through hole about 12mm (hex bar) into a piece of brass round bar 20mm long. I'm trying to find out which ways to go about doing this, if it works I could end up doing 100s. As yet I have no rotary table, indexing system, vertical / horizontal slides. I only have a three and four jaw chuck but looking into collets for the future. What's my best route to take ? Help I have a headache :bang: |
| DMIOM:
Have a look at this thread which may give you some food for thought. Dave |
| Trebor:
If only I had the tools or the money to buy one, just now I have to be a bit careful just what I buy. I was thinking about drilling 6 holes and machining out the centre to start with. Only it could be very repetitive. |
| drmico60:
Hi Trebor, If you have many of these to make then rotary broaching is probably the easiest way to go. I have developed a very simple rotary broaching tool which is described here: http://mikesworkshop.weebly.com/rotary-broaching.html The version I describe would be too small for what you want to do but you could probably scale it up to accommodate a bigger tool. Mike |
| Jasonb:
Or just use a hex broach and press you could cut several hundred in the time it takes to make a rotary broaching tool http://www.steelmans.co.uk/?130,12mm-hexagon-broach They can be homemade from silversteel (drill rod) if you just want a try. |
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