Drilling - Revision history

DianaProbst: /* Cobalt bits */

2015-06-24T23:54:48Z

‎Cobalt bits

2015-06-24T23:52:49Z

2015-06-24T10:09:20Z

2015-06-24T10:06:03Z

‎General purpose bits

2015-06-24T10:00:45Z

2015-06-23T17:15:55Z

2015-06-23T13:35:39Z

2015-06-23T13:35:09Z

2015-06-23T13:33:42Z

2015-06-23T13:33:28Z

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 These drill bits are harder, making them more able to drill steel without being damaged. However, there are very expensive. '''Please think carefully before attempting to drill with these'''
 Have you:
-* Mounted the bit in either a drill press or the lathe tailstock? (Do not use these bits in a handheld drill!)
+* Mounted the bit in either a drill press or the lathe tailstock, or in the mill? (Do not use these bits in a handheld drill!)
 * Applied cutting lubricant?
-* Set the speed of the drill press or lathe appropriately?
+* Set the speed of the drill press, lathe, or mill appropriately?
-'''If in doubt, as for help!'''
+'''If in doubt, ask for help!'''
 == Cutting lubricant ==

@@ Line 2: / Line 2: @@
 * '''General purpose bits''' These have a yellow coating, come in 0.5mm increments, are are kept in a box near the drill presses.
-* '''0.1mm bits''' These are dark grey, come in 1mm increments, and are also kept near the drill presses.
+* '''0.1mm bits''' These are dark grey, come in 0.1mm increments, and are also kept near the drill presses.
 * '''Centre bits''' Short, grey bits used to drill a starting hole. Kept in a wooden box near the lathe.
-* '''Cobalt bits''' Grey, kept in a black box (FIXME - where?). Intended for drilling steel. Expensive, use only if you're confident that you know what you're doing. Do not use these in a handheld drill - use only in the lathe or drill press.
+* '''Cobalt bits''' Grey, kept in a black box (FIXME - where?). Intended for drilling steel. Expensive, use only if you're confident that you know what you're doing. Do not use these in a handheld drill - use only in the lathe, mill, or drill press.
 Checklist for drilling:

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 [[File:Drillbits.jpg]]
-== 0.1 mm bits ==
+== 0.1 mm increment bits ==
 Do you know where these were ordered from? If so, please edit this page.
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 == Cobalt bits ==
 These can be reordered [http://www.toolstation.com/shop/p60904 here].

← Older revision		Revision as of 10:06, 24 June 2015
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	== General purpose bits ==		== General purpose bits ==
		+
		+	[[File:general_bits.jpg]]

	These can be reordered [http://www.screwfix.com/p/erbauer-hss-drill-bit-trade-pack-150pcs/73567 here].		These can be reordered [http://www.screwfix.com/p/erbauer-hss-drill-bit-trade-pack-150pcs/73567 here].

← Older revision		Revision as of 10:00, 24 June 2015
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	== Centre bits ==		== Centre bits ==
		+
		+	[[File:centre_bits.jpg]]

	These short, fat bits are much more resistant to deflection, so tend to put your hole in the right place. They can be delicate, and some of Makespace's set have had their fluted tip broken off. Please don't use a bit that is much smaller than the first 'full length' bit you're going to drill with.		These short, fat bits are much more resistant to deflection, so tend to put your hole in the right place. They can be delicate, and some of Makespace's set have had their fluted tip broken off. Please don't use a bit that is much smaller than the first 'full length' bit you're going to drill with.

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 * Finally drill with the 8.2mm bit.
-Check that the bit you have taken out really is the correct size (it may be printed on the shank, otherwise use callipers to check), and '''make sure you replace it in the correct hole'''.
+Check that the bit you have taken out really is the correct size (it may be printed on the shank, otherwise use callipers to check), only take '''one at a time''' out, and make sure you '''replace it in the correct hole'''.
 == Centre bits ==
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 * Applied cutting lubricant?
 * Set the speed of the drill press or lathe appropriately?
 == Cutting lubricant ==
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 When cutting metal, a cutting lubricant will usually give a better, more accurate, surface finish, and will protect the tool from damage.
-For steel, we have a lubricant called Molyslip. You can buy more at Mackays.
+For steel, we have a lubricant called Molyslip. You can buy more at Mackays. It lives in a plastic bottle, often near the metal mill.
-For aluminium, we do not have any dedicated cutting lubricant. These are often paraffin wax based. If you want to do some research and order some, that would be great!
+For aluminium, we do not have any dedicated cutting lubricant. These are often paraffin wax based. If you want to do some research and order some (and write about it here), that would be great!
 In the mean time, Boots plain lip balm seems to improve the cutting somewhat.

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 * Have you '''set the speed''' correctly from your material and the drill diameter?
 * Are you using '''cutting lubricant''' for drilling metal?
 Remember: breaking a bit is forgiveable, but 'fess up and report it on the google group.

← Older revision		Revision as of 13:35, 23 June 2015
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	* Are you using '''cutting lubricant''' for drilling metal?		* Are you using '''cutting lubricant''' for drilling metal?

		+	Remember: breaking a bit is forgiveable, but 'fess up and report it on the google group.