Giles
Western Thunderer
The current slew ring has to go, and the external gear must replace it. It used to be a full gear I saved from something twenty years ago (can't remember what) and I cut the centre out with a piercing saw to take the thin profile bearing, which was bedded I with Milliput (the loads of course being minute in real terms). Care was taken to get it as concentric as possible, however, to avoid the minor gear from disengaging.
![IMG_0317_zpsnsffqinh.jpg IMG_0317_zpsnsffqinh.jpg](https://www.westernthunder.co.uk/data/attachments/73/73845-aef2166afbbaa5ead2c34450bc1b4bd8.jpg)
One fiddly job, however was the minor gear was cored with a 'D' hole the wrong size. This needed boring out round, and then bushing ready for the slew motor. In order to hold this in the lathe, a piece of tube was cut and used as a 'split collet' to protect the teeth and hold it concentric. This job went fine, and a brass bush was araldited in.
![IMG_0323_zpscovkzrrj.jpg IMG_0323_zpscovkzrrj.jpg](https://www.westernthunder.co.uk/data/attachments/73/73846-9966940a84c1da32151d7434d62e7806.jpg)
![IMG_0317_zpsnsffqinh.jpg IMG_0317_zpsnsffqinh.jpg](https://www.westernthunder.co.uk/data/attachments/73/73845-aef2166afbbaa5ead2c34450bc1b4bd8.jpg)
One fiddly job, however was the minor gear was cored with a 'D' hole the wrong size. This needed boring out round, and then bushing ready for the slew motor. In order to hold this in the lathe, a piece of tube was cut and used as a 'split collet' to protect the teeth and hold it concentric. This job went fine, and a brass bush was araldited in.
![IMG_0323_zpscovkzrrj.jpg IMG_0323_zpscovkzrrj.jpg](https://www.westernthunder.co.uk/data/attachments/73/73846-9966940a84c1da32151d7434d62e7806.jpg)