31-15 compatibility with servo motor

[steveh]

Cityclip, I use the original pully wheel on the machine, My v-belt is small 1/4 inch or 3/8 and is compatable with the machine and the motor.

[JerryZ]

Some of the 31 class machines were shipped from the Singer Sewing Machine Factory in Elizabeth Port N.J. with a round groove, designed for a 5/32" diameter round leather belt and mounted on a foot powered treadle "Table" for tailors, etc or from a "line shaft". The handwheels with pulleys designed for v-belts were originally intended by Singer to be sold for "factory" production manufacturing, or in other words to be operated from a "safety table" with some kind of a motorized transmitter or motor.

Singer model 31 class machines were manufactured for many many years. It was a successful design, inexpensive to produce and was an amazingly good product for its time. They were produced in several countries around the world in various forms from about 1895 to just a few years ago. In fact copies are still manufactured in India and Russia. Although the materials are not the same as when Singer poured castings in New Jersey and Connecticut, literally threw them out in the snow and summer heat for a few years before machining and assembling them, some poorer countries still use a 31 style machine for tailoring purposes.

Jerry

[rdb]

Thanks Art, always very useful information...appreciate it.

Thanks to JerryZ too. You made me look closer at my pully wheel. It has a round leather belt, but after looking at it, it has a v groove...woohah. Mine must be one of those industrial ones set up for the vee. Now just have to find a motor.

cityclip, hope yours is the same, although both steveh and Luke say it will work anyways, but here's Gates Rubber in case: http://www.gates.com/

[cdthayer]

Some of the 31 class machines were shipped from the Singer Sewing Machine Factory in Elizabeth Port N.J. with a round groove, designed for a 5/32" diameter round leather belt and mounted on a foot powered treadle "Table" for tailors, etc or from a "line shaft". The handwheels with pulleys designed for v-belts were originally intended by Singer to be sold for "factory" production manufacturing, or in other words to be operated from a "safety table" with some kind of a motorized transmitter or motor.

Singer model 31 class machines were manufactured for many many years. It was a successful design, inexpensive to produce and was an amazingly good product for its time. They were produced in several countries around the world in various forms from about 1895 to just a few years ago. In fact copies are still manufactured in India and Russia. Although the materials are not the same as when Singer poured castings in New Jersey and Connecticut, literally threw them out in the snow and summer heat for a few years before machining and assembling them, some poorer countries still use a 31 style machine for tailoring purposes.

Jerry

I believe that there were two different handwheels. The larger treadle 6-spoke handwheel #2135 was both larger in diameter and heavier than the smaller 5-spoke #12358, and for a couple of reasons. Mainly to provide added momentum to assist the treadle effort, and secondly, to allow a "Stop Motion Device" to be included that allowed the pulley to run free, making it possible to wind bobbins without the mechanism turning.

I'm in the process of setting up a 31-15 combo treadle/electric table at the shop. I have a couple of heads, one with a large wheel and one with a small wheel. I'll be using the large wheel because I want to be able to treadle mine. I just have to decide which head I'm going to use. If I can remember the next time I go to the shop, I'll try to get some photos of the pulley grooves for a comparison.

[cdthayer]

....I'll try to get some photos of the pulley grooves for a comparison.

Here are the handwheel/pully comparison photos:

[DCKNIVES]

Another one here with a 31-15. I have the five spoke handwheel with a v-belt.Dave