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I am looking at a comparison between the impact properties of wood and plastic. However, wood impact properties are given in reference to a different test. Plastics use I-zod or charpy. Is there data on how wood would perfrom in these tests. Even a simple comparison such as "pine has an...

Does a worm gear have to be helical? Or can it be a spur gear? My output shaft angle is 58 degrees instead of the common 90 degrees. I have read from several sources to treat this as a crossed axis helical gear configuration. Crossed axis helical gears with opposite hands, require that...

Does anyone know where I could find information regarding the nubmer of seats for each of the FEA packages? e.g. 10,000 seats ansys, 7,000 abaqus, 9,000 Femap, etc.

Is stainless 303 applicable to rivets? Does it typically require an addtional coating, and if so what are they. Thanks for the help. Spears

I am looking for a shaft and bushing combination. THe shaft will have a medium load, low rpm, at normal temp, and occasional use. THe bushing will not be lubricated. I would like to use brass or bronze. I am curious about the surface roughness specs for the shaft and bearings as well as the...

I have a skewed worm assembly for medium power transmission and indoor use. I have choosen 1045 steel for the helical worm gear and will probably use 1045 for the worm as well. However I have seen similar gear setups with a gold or bronze coating on the steel. I presume this is for friction...

I am looking for reference information on skewed worm gears. All of the info I have found is related to a 90 degree angle between the non-intersecting shafts. I am looking at designing a worm and worm gear assembly where the shafts are skewed at 30 degrees. Thanks