1 00:00:11,110 --> 00:00:15,870 In the third and final part of this video series, the material will be threaded 2 00:00:15,870 --> 00:00:22,350 with a female thread to complete the series of this introduction to turning. 3 00:00:22,350 --> 00:00:29,950 Using the Jacobs chuck, chuck key and centre drill, the Jacobs chuck goes into 4 00:00:29,950 --> 00:00:35,310 the tail stock, making sure that it is secure and then in with the number four 5 00:00:35,310 --> 00:00:41,070 centre drill. Securing that and tightening with the chuck key. 6 00:00:44,950 --> 00:00:50,030 The tail stock is pushed up towards the material and locked off to secure into 7 00:00:50,030 --> 00:00:58,230 position. On with the machine, only a small hole is required up to about 8 00:00:58,230 --> 00:01:01,710 halfway on the drill bit, as indicated with the rule. 9 00:01:03,990 --> 00:01:08,590 Then maneuvering the drill bit into position to drill that hole, this hole is 10 00:01:08,590 --> 00:01:12,030 an initial start and will be drilled deeper. 11 00:01:12,030 --> 00:01:15,870 The turning of the lathe with the forward pressure on the slider block is what 12 00:01:15,870 --> 00:01:16,990 will create this hole. 13 00:01:27,190 --> 00:01:29,190 Undo the block and slide it back. 14 00:01:32,550 --> 00:01:36,790 Removing the drill bit and replacing with an eight and a half millimetre drill 15 00:01:36,790 --> 00:01:42,510 bit, making sure to secure with the chuck key ready to drill the main hole. 16 00:01:46,470 --> 00:01:50,670 The setting of a depth stop ensures that the hole is drilled no deeper than is 17 00:01:50,670 --> 00:01:55,070 required. This will be set initially at 20mm. 18 00:01:57,070 --> 00:02:01,390 Sliding the tail stock back into position, and then once again, locking it off 19 00:02:01,390 --> 00:02:03,550 to ensure that it's secure. 20 00:02:03,550 --> 00:02:10,870 Drilling will require cooling so the waterspout is positioned, water turned on, 21 00:02:11,510 --> 00:02:15,270 the machine powered on, and the operator is now ready to drill the main hole. 22 00:02:18,830 --> 00:02:24,950 Drilling to a depth of 20mm, the operator will manually control the depth, 23 00:02:25,310 --> 00:02:29,750 keeping an eye on the depth gauge and carefully applying steady forward 24 00:02:29,750 --> 00:02:32,830 pressure in order to achieve the depth required. 25 00:02:34,110 --> 00:02:36,590 Once done the water coolant can be switched off. 26 00:02:38,870 --> 00:02:42,430 With the machine off, the drill bit can be manoeuvred back into the hole 27 00:02:42,430 --> 00:02:46,550 created; in order to double check the depth gauge for accuracy. 28 00:02:46,870 --> 00:02:52,070 The operator started the depth gauge at 20 millimetres, and it is now at 40 29 00:02:52,070 --> 00:02:58,510 millimetres. So the hole has been drilled to a total depth of 20 millimetres. 30 00:02:58,510 --> 00:03:02,110 Unlocking the tail stock and sliding it back out. 31 00:03:02,790 --> 00:03:08,030 The Jacobs chuck is removed as the hole is now ready for threading and the live 32 00:03:08,030 --> 00:03:09,270 centre is inserted. 33 00:03:11,950 --> 00:03:14,030 The compound slide is moved out of the way. 34 00:03:16,630 --> 00:03:22,750 Next, with use of the tap wrench, the M10 tap for making the thread and some 35 00:03:22,750 --> 00:03:29,630 lubricant. The tap wrench has a square drive in the centre of it where the 36 00:03:29,630 --> 00:03:32,270 square drive of the tap itself is attached. 37 00:03:36,670 --> 00:03:40,510 Just like so, and then the tap wrench is tightened up. 38 00:03:42,350 --> 00:03:46,790 The tap is then inserted into the hole that has been pre drilled, supported by 39 00:03:46,790 --> 00:03:48,470 the top of the compound slider. 40 00:03:51,870 --> 00:03:55,110 The live centre is then manoeuvred into position on the tap wrench. 41 00:03:57,070 --> 00:04:01,830 Locked into position, the lubrication is then applied. 42 00:04:04,950 --> 00:04:09,510 To create the thread using the chuck key, the chuck is turned towards the 43 00:04:09,510 --> 00:04:14,190 operator in an anticlockwise direction, whilst at the same time with one hand 44 00:04:14,190 --> 00:04:18,910 on the tail stock turning in a clockwise direction to maintain pressure and to 45 00:04:18,910 --> 00:04:21,790 advance the screw cutting tap into the hole. 46 00:04:21,790 --> 00:04:26,030 When the process is complete, the tail stock can be unlocked, slid out of 47 00:04:26,030 --> 00:04:34,710 position. As well as the compound slider, the tap wrench can be removed 48 00:04:37,310 --> 00:04:41,870 and now the operator can inspect the thread that has been created. 49 00:04:41,870 --> 00:04:45,670 To reveal an M10 by one point five millimeter threaded hole.