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Hi all, how do you increase the accuracy in solidworks? Thanks, Lee

Hi all, does anyone know a way to export high resolution movie file from design animation module? I can only get screen capture quality movie from it. thanks, lee

Hi all, Could anyone explain how a vacuum regulator / pressure regulator work? My understanding is a regulator is used to create 2 chambers of different pressure readings. If a diaghram is used, how can air goes from one chamfer to another? Thanks, Lee

Hi all, what is the standard angle for a locking taper? Does it depend on mating materials? A taper machined onto two mating parts such that when the parts are mated the frictional forces are so great will not rotate or move with respect to one another. No clamping forces are required to keep...

hi all, I'm designing a plastic float which will be subjected to medical sterilization such as ETO, autoclaving and hydrogen peroxide gas plasma. I'm thinking about doing a 2-piece design which will be snapped together with o-ring in between for preventing water from getting into the float. I'm...

Hi All, For aluminum casting part (sand cast, permanent mold or investment casting), do we need to core out the part? I have seen a lot of casted parts with very thick section. What is the recommended maxinum wall thickness for a part size of about 3" X 2" X 24"? Thanks, Lee

hi all, where can I find info about coefficient of friction for plastics? any good websites or books? i'm designing a ball joint and thinking about using pp on pc Or pp on pp. I also need to know the compatibility and wear issues. I can find info regarding individual plastics but i need to know...

Hi All, I'm thinking about using TPE/elastomer material as a spring, like wave washer or flat spring. Has anyone done something like this? creep might be an issue? how do you predict spring force? thanks, Lee

Hi All, Has anyone seen a custom thread design that allows a threaded nut to follow a curved threaded rod (true arc trajectory), like bending a lead screw. can it be done? I think it might be possible if the nut only has one thread inside. has eveyone seen something like that? and where...

Hi all, I have a fluid question and hope you can help me. If the air flow rate and tube (inlet and outlet) ID remain constant, is it true that the pressure drop across a member will remain the same no matter what the pressure at the system is operating at? eg. for constant flow rate and tube...

Hi All, What are the finishing options for aluminum part with blasted surface finish? I'm looking for some kind of coatings/platings/... which can protect the part from stains/scratches and normal cleaning agents. I also need to keep the natural aluminum color (dull silver look), so I guess...

Hi, I'm looking for small gas spring (3.5" max. overall length after extension). Could anyone point me to any companies who make small gas springs? by the way, how small can a gas spring go? is there any limitations? I'm interested in gas spring's ability of providing force and dampening...

Hi All, I'm looking for standard torque specifications for bolts/screws (table/chart)? Does it ever exist? Thanks, Lee

Hi All, Is it common to pickle and then passivate stainless steel weld joints? Or, it is either pickling or passivate, not both. or, we need to pickle the material before welding, and then passivate the welds after welding. I am trying to find out the general weld finish requirements for...

Hi All, Do anyone know where to find/get rodend with roller/ball bearings of bore size of at least one inch in diameter. I need them for high speed applications. The only thing I can find is hanger bearing from SealMaster (SEHB-20), but it uses pipe thread. Most of the rodends are with plain...

Hi all, Are there ways to reverse a regular single phase fractional hp AC motor? I think switching the wires will not do it. Can I do it by using additional hardware (switches or controller or ...)??? Or Do I have to get special kind of motor. Thanks, Lee

Hi Gurus, I am designing an agitator which can agitate an 3000lb object linearly at about 180 rpm. I will use a 10 to 1 gear ratio gear box to achive 180 rpm requirement. And, I will use an VFD drive to alter the speed of the agitation (from 60 rpm to 180 rpm). I have a few questions and hope...

Hi Gurus, Is there any theories or equations relate force to velocity? An object, which is tied to a rope, moves in constant velocity. When the rope is taut, what is the tension on the rope at that instant (when the object is instantly stopped/reversed)? I think the force will be approaching...

Hi All, I looking for suitable material for cam. It is the first time I am working with cam. what is the common cam material nowadays? My application is high load, low speed, metal to metal, both sliding and rolling contact, grease lubrication. The material needs to have good wear and corrosion...

Hi all, Could anyone help me in finding door seal manufacturers for freezing chamber? The temperature range is -70 to room temp in celcius. so far silicone rubber is my choice of material (teflon might be a little overkill). I couldn't find anyone selling stocked extruded silicone gasket (P...