Up one level Neidrauer Adventures Photo Album and Blog » The Rahn-Larmon Lathe » Re-Assembly and return to service
Re-Assembly and return to service
Pictures from the repairs and the return to service story.

Closeup of the backside mystery screw. Closeup of the makers mark. Internet searching found patents from 1881-1889 by William L Sweetland for other chuck designs, mostly 3-jaw. Since this is not a patent chuck, I have not been able to date it. Also unknown is whether 21-Sept-07 Here's the latest picture showing the cleaned up Hoggson & Pettis MFG Co. 21-Sept-07 The faceplate all cleaned up. I think it might be original to the lathe; the number Closeup of the jaw slot and the pinion (?) support on the left. It is adjustable in some fashion as there is a screwhead on the backside, but what it adjusts I don't know. Slack in the pinion gear maybe. Or maybe it is just a replaceable part. The front of the It's been used to the point of abuse...the jaw gear for jaw #1 shows the crack in one side of the gear, which two others also have. Almost worn out - jaw #4 has a metal spacer jammed in it to prevent the chuck key from slipping on the badly worn hole. Everything still matches! Jaw K-1 was still mated to screw 1 (and the stamping was still visible!) which matched the 1 - K stampings on the chuck. 21-Sept-07 The backside of the Hoggson & Pettis It's Alive!!! It's Alive!! Happy Happy Joy Joy! 14-Sept-07 The drum switch is wired in, the overhead shaft clutch is connected (note the engage stick coming from the rafter) and she runs again!! I am so happy. 8-Sept-07 The new repleacement cross-slide screw and nut are installed. 8-Sept-07 A new replacement cross-slide screw and nut have been fabricated, thanks to Miller Machine & Fabrication. 11-Aug-07 Progress of the drive system re-assembly is slow, but moves forward with the mounting of the motor and chain drive to the overhead lineshaft. The main drive belt is also shorted to accomodate the lower overhead height. The Rahn-Larmon lathe awaits a new cross-slide screw and nut being fabricated by Miller Machinery in Carrolton, Il. Still trying to figure out all the gearing... The lathe at the end of April 31-March-07 The lineshaft installed! Clutch view of the overhead lineshaft assembly. 31-March-07 The overhead lineshaft after cleaning. I decided not to clean the pulleys at this time, but they sure are coated with layers of belt dressing. 21-Mar-07 Making a new feed spur shaft by turning between centers. We had to use the steady rest to minimize the chatter. Using the Sunnen Pin Hone is pretty simple with the right mandrel. Set the pressure, hang onto the part and turn on the hone, stoke until the dial indicates no pressure. 14-Mar-07 Bill shows me how to use a Sunnen Pin Hone to take the 0.002 14-Mar-07 Boring the bearing surfaces for the spur shaft to remove the damage scars. Lowing the apron into position for re-assembly. 13-Mar-07 A delicate operation - the feed and lead screw have to be put in from the headstock end, but I don't have enough room between the wall and the lathe to do that. So the screws are put into the apron before re-assembly, the the apron moved into place. 7-Mar-07 The brazed and repaired bracket after machining. The feed shaft spur shaft is prepared for replacement. After nosing around and finding a steel pin that was blended in with the gear profile (hiding it well), we were able to pull the gear off the damaged shaft. 7-Mar-07 Boring the braze off the repaired bracket. 7-Mar-07 The bracket was held to the faceplate with a stud. 7-Mar-07 Indicating the back hole for center, since we can't indicate the front--all the braze needs to be machined off first! Try #2--use the lathe to bore the hole, since I don't have a boring bar that will go big enough in the mill. 7-Mar-07 Try #1 to find a setup for machining the braze off the repaired bracket. Re-assembling the Rahn-Larmon lathe was done with the shop crane. The headstock, tailstock are in place and the carriage is positioned.

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