Search found 31 matches

by Vazquez
Thu Mar 09, 2017 9:47 am
Forum: Mechanical Projects
Topic: Changing from cam followers
Replies: 0
Views: 2065

Changing from cam followers

Hi folks been a while since i've been here and also able to play with something new. We have a small machine that operates with a small motor driving a shaft at 4 RPM. There are a few single lobe cams on the shaft and there are ball bearing followers they are acting on. The part the followers are on...
by Vazquez
Thu Mar 09, 2017 9:46 am
Forum: Mechanical Projects
Topic: How do i calculate the strength of a friction hinge?
Replies: 0
Views: 1473

How do i calculate the strength of a friction hinge?

Dears,

I am planning to use a single friction hinge at the center of the door. The door height is 7 inches and length is 17 inches. Weight of the door is 4.5 pound. Length of the hinge is 3.2 inches and pin diameter is .230 inches. How do i calculate if the hinge is good enough for the application?
by Vazquez
Thu Mar 09, 2017 9:45 am
Forum: Mechanical Projects
Topic: How to apply a constant, gradually increasing load to a machine.
Replies: 0
Views: 1573

How to apply a constant, gradually increasing load to a machine.

Hello. I'm an amateur engineer that has dabbled in just about everything. Electronics, computer engineering, wood, metal, plastic, the list goes on and on. But I'm having trouble figuring out how to design my newest project. Sure, I do have ideas, but they're not elegant. The machine is a piece of e...
by Vazquez
Thu Mar 09, 2017 9:41 am
Forum: Mechanical Projects
Topic: Crown and spur gears
Replies: 0
Views: 1274

Crown and spur gears

I have to make a small reversing gear assembly and i've proposed it to use 2 spur gears and a crown face gear. Now I have to do the models but i'm not finding much information of the modeling of a crown gear and how to make the teeth? Am I making it too complicated? I have it in solidworks now but i...
by Vazquez
Thu Mar 09, 2017 9:39 am
Forum: Mechanical Projects
Topic: Horizontal Rod Size Required
Replies: 0
Views: 1296

Horizontal Rod Size Required

Many, many years ago I graduated college as a Mechanical Engineering Technologist but my career path took me elsewhere. I therefore can use and comprehend most of the "tools of the trade" but I'm very rusty in that usage. I therefore don't feel fully confident in my own calculations and would like s...
by Vazquez
Thu Mar 09, 2017 9:38 am
Forum: Mechanical Projects
Topic: How do I determine a desired Charpy/Izod result?
Replies: 142
Views: 8976

How do I determine a desired Charpy/Izod result?

I have a design that we are seeing fractures in. We are changing the material in the design for better toughness. I have done FEA on the design and know the stresses. I know the approximate Yield and Ultimate strength that I am specifying. I would also like to specify a Charpy value but i can't find...
by Vazquez
Thu Mar 09, 2017 9:37 am
Forum: Mechanical Projects
Topic: Plastic Part Carrying Torque and Radial Load
Replies: 0
Views: 1459

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 tested some 3D printed parts and it transmits the torque fine. My problem is that this part is always under a rad...
by Vazquez
Thu Mar 09, 2017 9:36 am
Forum: Mechanical Projects
Topic: I need to lift a roof
Replies: 0
Views: 1458

I need to lift a roof

I have a outdoor structure that I'm replacing the entire roof on but it's 20' in the air. And when I say "the entire roof" I mean everything from the trusses to roof metal. Because of the structure design I built the roof on the ground with the intent of hoisting the old roof off and hoisting the ne...
by Vazquez
Thu Mar 09, 2017 9:35 am
Forum: Mechanical Projects
Topic: Usage of one way bearing
Replies: 0
Views: 1323

Usage of one way bearing

I am developing a motorized cable reel. I am using a geared DC motor to drive central cable drum on which the cable rests. This cable reel is only used to automatically retract the cable back once the cable is pulled out. The cable is pulled out manually by hand from the cable reel. I am using a one...
by Vazquez
Thu Mar 09, 2017 9:33 am
Forum: Mechanical Projects
Topic: Pumping against Vacuum
Replies: 0
Views: 1017

Pumping against Vacuum

I have a vacuum vessel that is half full of water and -0.7 bar vacuum maintained above it. I am constantly filling the vessel with cold water and removing it with a centrifugal pump. The tank outlet is on the bottom that runs down about 3 feet to the inlet of the pump. There is a small line (1/2" or...