| Gallery, Projects and General > Project Logs |
| Dry sump pump build |
| << < (4/4) |
| andre:
G'day Jones I also live in Sydney. I am in year 12 I am building a cnc lathe Out of curiosity what Cad are you using? |
| jones:
Hi Andre, all CAD is done in Solidworks :D :worthless: Not too much progress to report, other than that I've got the new workshop sorted to a level where I can continue work on the pump :) The jig for machining the bores for the gears: This ensures they're all the same. I've only machined one of the bores but to do so I had to make a new boring bar. It's pretty rough but it did the job. The pocket for the gear is bored to 38.12mm for a 38.10mm diameter gear and 30.50mm depth for the 30.48mm width of the gear. The aluminium will expand more than the steel gears so the clearances should increase and it shouldn't seize (well, that's the theory. I might have not given it enough clearance, we'll see once I've got it assembled) Now that I've got the boring bar, 1/2" reamer and faceplate jig sorted I hope the pump won't take too long to make. It really is not a complicated part but each piece needs to be fairly accurate for it to work properly. I don't think I've ever made anything with tolerances this tight, it's interesting. |
| jones:
Found time to bore another of the gear housings. The gears mesh pretty well, I'm happy with how it's going. I've got the process down now so it shouldn't take long to finish off the other housings. |
| jones:
I'd say the pump is around 70% done now, not including the mounts or pulley. I've bored out all the gear pockets and most of the bearing ones. The bottom right piece shown in the last pic slipped in the jig after the last cut. The hole is the right diameter and depth but now has a huge burr at the bottom. I might be able to fix it, I'll try tomorrow. To finish the pump I have to drill and tap the inlets and outlets, bore out the end piece for it's second bearing and oil seal, put a keyway in two of the gears and make the drive shafts, pulley and mounting bracket. |
| Navigation |
| Message Index |
| Previous page |