| Gallery, Projects and General > How do I?? |
| Calling all Watchmakers!!!! |
| << < (2/3) > >> |
| 75Plus:
After thinking about my previous post I realized that the subject of this thread will measure surface speed not RPM. The one in the link will only show RPM so it is back to looking for a watchmaker or instrument repairman to service the this one. You might look in the yellow pages for "Instrument Repair". BTW: The measuring wheel is 6" in circumference and makes 2 revolutions per foot. A point contact attachment to press against a shaft would tell the RPM by doubling the FPM reading. Joe |
| ieezitin:
Bernd. Great eyes you have I did not notice that I will check that out tomorrow. 75 plus. No problem on the mistake, you say you used them before tell me your opinion on this little tool? Stilldrilin. Glad you like the rpm meter, since you like it I may look into buying one cant beat the price. Andy. if you had that clock now even tho It was not working you would have no less than 500 pounds in your back pocket. All the best Anthony. |
| 75Plus:
Anthony, My use of this type speed indicator predated digital readouts. (Biddle does/did make one that was digital) I was involved in plant maintenance including several miles of conveyor systems. The indicators we had were made by Biddle. They were very accurate and easy to use. The way they used a time interval to record the speed meant that you did not need to watch the dial during measuring. Some of the rollers we had to measure were not completely accessible so it was easy to just reach in/over and get the measurement blindly. The way it works is, you push the plunger which winds the mechanism and resets the pointer. With the plunger depressed place the wheel on the part to be measured. Releasing the plunger starts the clock and measurement. After the time interval the pointer stops and you read the speed. The ones we had had FPM and RPM scales and several adapters for different types of turning surfaces. This may be more information than you were asking for but you can use it as needed. Joe |
| DICKEYBIRD:
Can't help with fixing that nifty Swiss instrument you found but here's a good deal on a Tach/Surface speed meter. http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=66400 I got one a while back and it works great! |
| SKIPRAT:
I too have a mechancial speed indicator made by smiths industries about 50 years ago and still works ok. measurement of surface speed is taken using the wheel and revolutions measured using the contact point or by using the cup on the end of small spindles. Cheers Paul |
| Navigation |
| Message Index |
| Next page |
| Previous page |