A member of the shop had fabricated a lifting attachment from HSS tubing. If the part of the device are two sections mitered at 45 and welded together are these still considered two sections with the weld joint being a treated as a fixed support or one section in a FBD?
Customer drawing calls for minimum bend radius on 304 ASTM A666 stainless steel. ASTM specifications give a Bend Factor of 1 for Thicknesss>0.050 to <= 0.1874in. for Free Bending and Bend Factor of 3 for V-Block Bending. Is air bending regarded as "Free Bending"?
Our company is considering purchasing a flexible cable fall protection system. The manufacture requires the climbing structure be capable of supporting the loads imposed by the system. For calculation purposes the required bracket load may be assumed to be distributed evenly between the number...
I'm constructing a small rotating tool stand and planning to use two sets of tapered roller bearings (Timken L44643 2 bearings. The average loading would be less than 500 lbs. The nominal shaft size is 1.0 inch diameter, and the housing is 1.98 inch diameter. The housing would be stationary and...
Does anyone have an calculation to estimate the tonnage required to form a joggle or offset bend in sheet metal? Most texts will give an estimate between 3 - 6x the tonnage for air bending?
I had recently fabricated a set of welding turning idlers for our weld shop using a set of 10 diameter wheels, 28 inches center to center. We are using it to turn 50" diameter tanks while welding. The tanks will be over 1500#, welding at a maximum of 45 ipm. I want to motorize the unit using a...
If you were designing a mobile gantry with the side structure being typically an A-frame, would both ends of the vertical column be considered as "fixed" end conditions.
I need to make a custom bushing driver. I am considering using ASTM 4140 material? Any other material I should be considering? Should it be hardened and too what degree?
Thanks for your help
Has anyone in the forums had any experience in press fitting drawn cup needle bearings? I would like some know how to calculate the force required to press fit a needle bearing into a bore?
Over the years I have done stop watch time study analysis, but would prefere to use a pre-determined time standard system such as Modapts or MOST. Both are similarly structured and have been around for many years, but which one is prefered in practise.
Your feedback would be appreciated.
What is the best way of determining the proper size of a plug weld to replace a resistance weld in an assembly? Is it based upon the diameter of the spot weld electrode and the depth of the plug weld.
Does anyone know of a facilty in the USA or Canada which can test a certify a surge tank design? This is a small tank 9.98" height x 8.13"width x 29" length.
