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| boring a small hole |
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| colin563:
ive got to bore a small hole 0.500" round & 0.600 deep flat bottom what type or were would i purchase such a small boring tool or is any other way to do it i have limited resources & space :( i did think of a d bit never made one also i have no way of heating it up thanks colin |
| Dean W:
Colin, grind one from a HSS tool bit. Dean |
| colin563:
thanks for the reply dean does anybody know of any links to help me grind a boring tool im still learning this i went for the diamond tool holder for ease ive only got the use of 1 arm just make thing a bit difficult thanks colin |
| andyf:
Hi Colin, I reckon Dean's pics are a pretty good start on the sort of shape required. A bit of relief under the front cutting edge (on his middle tool, that's the edge resting on the ruler), and sufficient relief under the point so that the part under it it doesn't foul the side of the hole when the tool is at centre height, should get you there. If the material to be bored isn't too hard, a trick I have used here at Poverty Acres is to find an old Allen key, cut off most of the short leg and grind what remains into the required shape. A decent Allen key works quite well; avoid the sort that Ikea issues with flat-pack furniture. Andy |
| Lew_Merrick_PE:
--- Quote from: colin563 on June 30, 2010, 05:16:48 PM ---ive got to bore a small hole 0.500" round & 0.600 deep flat bottom what type or were would i purchase such a small boring tool or is any other way to do it i have limited resources & space :( i did think of a d bit never made one also i have no way of heating it up --- End quote --- Colin, What is your basic tool for this job? Lathe, mill, hand tools? The answer will depend on the foundation. If you have a barbecue or coffee tin (hobo stove), charcoal, and a hair dryer (blower), you have all you need to heat treat steel. Good even red glowing coals are sufficient to heat up a reasonably sized piece of steel to the Curie point (where it ceases to attract a magnet). Hold it at that temperature for a few minutes (20 minutes per inch of the thickest dimension is a pretty good starting point) and then quench in (salt) water or oil. Keeping the piece close to the coals gives you a carbon monoxide "blanket" that will protect you from some of the bad-nasties that can happen when working with gas. The American "steel industry" was charcoal based well into the 1830's. |
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