I am trying to verify the force to slip of our dual rubber cleated hose puller. Any input would be appreciated!
•We use 16 die springs / 8 per side of the belts. – Spring Rate 241 lb./1/10 in
•Total spring displacement is .5 in.
•Average coefficient of friction of cleated rubber belts - .45...
According to the Unbrako/SPS catalog (link above) the tensile strength for a 5/16 UNRF socket head cap screw is 11,000 lbs this is above the NAS standards.
If this is correct the SPS is 5% stronger then the Holo-Krome (10,440 lbs) fastener. If you also look the SPS material tensile strength...
Paint Specification
My company like many other machines manufactures supplies our equipment with standard paint colors. Over the years we have been able to work with our vendors to provide paint color that is uniform throughout paint types and processes. However we have the occasional...
My company exclusively uses Unbrako fasteners in specific high strength applications.
This practice as you can imagine gives our purchasing department fits when fastener deliveries do not meet expectations.
For this reason I have been searching for an acceptable alternative. I have found...
Machine Drivetrain Efficiencies
What is best way to determine the sum of machine drivetrain efficiencies?
Example:
20 hp motor driving a gearbox (98% efficient), which drives a timing belt (89% efficient) which drives a roller chain(89% efficient). What is total efficiency of the drive...
Has anyone addressed the new CE Machinery Directive stating that all fixed guards require the fixing systems have to be remain attached to the guards or to the machinery when the guards are removed? Also, where possible, guards must be incapable of remaining in place without their fixings...
TVP,
Our application does not requires aerospace approval.
Shell Lubrication recommended a non MIL spec grease ALVANIA® GREASE CG. Do you have any experience with this grease?
Wrap Spring Clutch Lubrication
My company has been utilizing a wrap spring clutch on our braiding machine for over 20 years. Do to the discontinuation of the original Aeroshell 17 grease we have been forced to change to Aeroshell 33MS grease. The new grease is not performing as well as the...
Rolling Impact Load Calculation
Does anyone know a simple formula for calculating impact load on a cam follower type bearing rolling over a .003” high track misalignment for a given mass and acceleration?
I am looking for a way to best specify matte chrome plate finish. I need to have a .001 max
thickness and a uniform roughness of 15-40 micro-inches. Our current company standard is very
vague and calls for a 120 grit bead blast after plating and a “light rag-wheel polish to remove...
Thanks EnglishMuffin for all your input. I tried to put your formula into an Excel spreadsheet and I am having some difficulties with the results. It appears that no matter what diameter I use the Ymax stays the same. Any thoughts.
Wire Sag
Ymax: 7.223390595 Max. Sag...
I am looking for some help in finding a way of analytically predicting the helix and diameter of high tensile strength wire being pulled over a rotating pin.
