I have a problem with a disc flexible shaft coupling that is used in screw compressors. This coupling is cracked and damaged after a short time, and the changing rate of this coupling is very high — about every 3 months. But as I understand from the machine manual, the coupling replacement may be every 8,000 hours or 12 months...
I'd like to invite you to come visit us at
Motion+Power Technology Expo. The show takes place in October at Cobo Center in Detroit, and we'll be there in booth #3826.
Does the definition of specific sliding mean the same between ISO 21771:2007 and AGMA 917-B97? In ISO, specific sliding is the ratio of the sliding speed to the speed of a transverse profile in the direction of the tangent to the profile. In AGMA, specific sliding is ratio of gear tooth sliding velocity to its rolling velocity.
I'm not able to get a good connection
between the pulley and shaft in my drive
assembly. Could you explain the various
ways of connecting a pulley to a shaft to
prevent the pulley from slipping?
I need help determining the diametral pitch needed to achieve the closest
center-to-center distance for 2 spur gears. The 1st gear is a 34-tooth and
the 2nd gear is a 28-tooth. The center-to-center distance between the
gears needs to be as close to 2 1/8" as possible.
I have a fairly straightforward question about a worm gear segment. But as of yet, I haven’t gotten a straight answer from any of the gear job shops I’ve approached about this job. Is there a "traditional" gear cutting method that can produce a ~180
degree enveloping worm gear segment when a feature on the back of the part will interfere with a complete rotation of the part? Or am I left with only the option of 4- or 5-axis surfacing with a CNC mill? I have presented this part to several well-known gear shops in the U.S. without a straight answer on how the part can be made. Any help you could offer would be appreciated.
Referencing a June 2014 Article, “High Gear Ratio
Epicyclic Drives Analysis,” by Dr. Alex Kapelevich:
I have designed a small compound epicyclic gearbox
with common planets.
Sun = 10 teeth
Planet = 14 teeth
Ring Gear stationary = 38 teeth
Ring gear output = 41 teeth profile shifted onto a 38
tooth pitch diameter.
Carriers are simply cages for the planet alignment
and location.
According to your article, and according to my
calculations and the prototype I have built, my inputto-
output ratio is a reduction of 65.6:1. I am using a ~
VG1 viscosity grease and Nylatron materials for the
gears and carriers.
A reader asks: I've determined that a stainless steel bearing is the best option for my application. I'm being asked to specify the grade of stainless steel in my product design. I'm not sure which grade to select and specify. Can you help?
A gear can be defined as a toothed wheel which, when meshed with another toothed wheel with similar configuration, will transmit rotation from one shaft to another. Depending upon the type and accuracy of motion desired, the gears and the profiles of the gear teeth can be of almost any form.
