| Gallery, Projects and General > Project Logs |
| Elmer's horizontal mill engine. |
| << < (19/23) > >> |
| modeldozer:
We have been away on a short holiday and I got so involved with finishing the governor that I am a bit behind in updating. Because of a few tricky operations on the governor body it was made from aluminium. I could just squeeze it into a 25mm round bar. The outer end was faced and turned down. It was mounted in the collet chuck and the inner end faced and turned to size. The groove for the fork was cut with a parting off tool. It was carefully drilled for the spring and shaft and the very end drilled through and taped for the adjusting screw. Then it was over to the mill to mill the ears flat, drill the holes for the weight arms and mill the slot for the drive pin. After doing the same on the other side it was set up and the slot for the arms milled flush with the outer part. Holes were then drilled at the ends of the slot. The slots were finished with a carbide single flute cutter that I normally use on the CNC router, as this is thin and long it was done very slowly. The finished body. The “ears” will be filed round. Next a piece of mild steel bar was turned down for the bearing end of the shaft. It was swapped around and the end that fits in the body was turned down. A pocket was cut in the end for locating the spring. It was then clamped in a V-block and set up on the mill to cut the two slots where the arms engage. The V-block and shaft was then repositioned to drill the hole for the drive pin. The shaft and body. The weights were turned and then, after a bit of head scratching, clamped down like this on the fixed jaw of the milling vice to cut the slots for the arms. For the arms a few pieces of 3mm plate was milled with a tiny upright on the one side (these will be filed to engage with the slots in the shaft). The other sides were milled down leaving material to file the pivot ears. They were then held on their sides and the pivot holes located and drilled. Turning the pivot pins. The pins were drilled for split pins. Various other pins were made from 3mm and 2.5mm rod. Had to cut these with a cutoff disk in the Dremel as these rods are some mystery very hard material and could not me turned. All the parts so far, after soldering, filling and a bit of cleanup. The governor was assembled and tested in the lathe. A few different springs were tried until one was found that gave a nice smooth operation. With this spring it was at full travel around 600 RPM. Once fitted it might be tweaked a little more. More to follow. Cheers Abraham |
| Manxmodder:
Superb work as usual,Abraham. This is going to be a very pretty engine indeed.....OZ. |
| modeldozer:
OZ, Thanks for looking in and the kind words. Made a fixture to hold the levers for silver soldering. Melted the one link a bit while soldering, unfortunately I only have 20% silver content rods. Turning the small pulley using a thread cutting tool and feeding at halt angle with the compound. Drilled out before parting off. Turning the large pulley. Both pulleys were drilled and tapped for a grub screw. For the post a piece of aluminium was milled square and to size and then set up. To drill the hole for the fork shaft. It was flipped and the cutouts for the governor milled. And the shaft hole drilled. Mounted upright to drill a oil hole with a small centre drill. Flipped over and mounting holes drilled and taped. Finished for now, some detailing might follow once tested. Two bushes were turned from brass. And fitted with retaining compound. The floor was set up and the mounting holes were located, drilled and counter sunk. With everything mounted the length for the connecting link was confirmed. The link was machined from a piece of 3mm plate. Pins were silver soldered in, here with a coupling I made for the exhaust port. All mounted on the engine, am waiting for some belt material to arrive. Cheers Abraham |
| Manxmodder:
With the collective parts all seen together the effect of all your painstaking detail work is really shining now. Very impressive build :clap: :clap:.....OZ. |
| Stilldrillin:
Abraham. This build, just gets better and better! :thumbup: Well done! :clap: :clap: David D |
| Navigation |
| Message Index |
| Next page |
| Previous page |