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Type: Posts; User: surfmase

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  1. Replies
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    yeah, I've seen pictures of what you are talking...

    yeah, I've seen pictures of what you are talking about. But this armature looks more like a PCB type of process, which is maybe where the "print" comes from. I'm having a hard time figuring out who...
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    Printed Armature Motor

    Hello,

    In our field (wire feed for GMAW) most people are using simple PMDC brushed motors up to about 100W. Some are using brushless motors in higher end applications, but not many. I have been...
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    Thanks for your input. This is really quite a...

    Thanks for your input. This is really quite a mess. I found out that my boss actually visited the heat treatment because we had some requests from a customer to increase the wear resistance. He...
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    Powder Metal Hardening

    Hello,

    Looking for some suggestions on hardening our powder metal parts. We have two types of parts: rollers from FC0205 and gears from FD0205. Both parts are compressed to relatively low...
  5. Thanks for the tip. The current design with key...

    Thanks for the tip. The current design with key is sufficient. Ease of manufacturing and cost are high on my list. This is why I am looking at alternatives to a key by using injection molded...
  6. Yes that is essentially my question. The...

    Yes that is essentially my question.

    The torque as well as the radial load can vary by application and user. Typically torque is between 2.5 Nm and 4.0 Nm. There are fluctuations but not jolts...
  7. pics

    1721
    1722

    Sorry; went on vacation then had to catch up with everything. So, in one view you can see the shaft with two flat sides. This shaft is driven by the gear in the back and should turn...
  8. Plastic Part Carrying Torque and Radial Load

    Hi Folks,

    I'm at it again. I'm working on a plastic "carrier" component to transmit power from an output shaft. I wanted to use a round shaft with two opposed flat sides to do this. I've...
  9. You have assumed that T1=T2, can you prove this? ...

    You have assumed that T1=T2, can you prove this? If so, then maybe this is the proof you need for your colleague. Could it not be that the slower wheel is delivering more torque than the faster...
  10. Replies
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    still working on it

    Thanks for everyone's input here. In the drawing there is black spot which is a straight knurl where a nylon gear is pressed onto the shaft. This gear is driving the shaft. On the left end there...
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    1466 was a little off with the dimensions...

    1466

    was a little off with the dimensions before
  12. Replies
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    I received some parts from the field today and...

    I received some parts from the field today and took a good look. The wear is from abrasion and shows small groove-like rings around the shaft. The wear is always stronger on the edge of the bearing...
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    Troubleshooting Shaft Wear

    Hello Forum,

    I'm having problems with a rotating shaft which is wearing excessively under its ball bearing support. The shaft is a cantilever layout with two ball bearings, one 6000 bearing in...
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    I may have found it... I = R^3 t ( a + sin (a)...

    I may have found it...

    I = R^3 t ( a + sin (a) cos (a) - ((2 sin^2 (a)) / a))

    where R is external radius
    t is thickness
    a is angle from vertical to one side. ie 2a is full sweep of section.
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    Thanks for your response. I have deduced that I...

    Thanks for your response. I have deduced that I am looking for the other one... to which I = b h cubed over 12 for a rectangle.
  16. Replies
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    perhaps sheets or rolls of foam tape.

    perhaps sheets or rolls of foam tape.
  17. Replies
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    Moment of Inertia- section of round tube

    Hi again,

    working of some plastic cantilever snaps which are on a ring shaped part. I found a calculator for half round tube, but I'm looking for 1/18 round tube, base spans 20 degrees. p.s. I'm...
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    Thanks for the tip, I'll investigate this milling...

    Thanks for the tip, I'll investigate this milling machine. I have no initial problems with extending the shaft out past the rollers. My problem is that the shaft is stationary and only the gear and...
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    741

    741
  20. Replies
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    Rotating mechanical connection

    Hello folks,

    I'm working on a carrier gear (gear with extension for carrying a changeable roller with it) with a quick release type function. The gear is supported by 2 bearings on a fixed shaft....
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    My book says that runout is a surface to axis...

    My book says that runout is a surface to axis control, concentricity is a median points to axis control, and position is an axis to axis control. I'm drawing a shaft which is supported by two...
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    Poll: I would say that one benefit of outsourcing is...

    I would say that one benefit of outsourcing is that a company can focus on its core competencies by outsourcing certain jobs. For example we are a small company and with limited resources we...
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    Hey there RWolfeJr, The product is a wire...

    Hey there RWolfeJr,

    The product is a wire feeder. The lifetime is over 10,000 Hrs. We achieve this with a current plastic spur gear design. I have thought of different gear systems such as...
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    4 plastic injection moulded gears + 1 brass...

    4 plastic injection moulded gears + 1 brass pinion + 2 cylindrical pins < $3.00

    1 plastic injection moulded worm-wheel + 2 sprockets + 1 chain + 1 tensioner assembly > $3.00 x 14
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    A chain seems to be a rather expensive solution...

    A chain seems to be a rather expensive solution as well
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