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Hello, Is there a standard with HVAC that the world uses to certify a leak test for nozzles? Thank you, FGY

Hi All, I am unsure exactly what the drawing is stating here; I cannot word out what it is? i think it reads - "D.C.D" but unsure. I believe the second and third letter stands for Cold Drawing, but I've never heard of the first letter D. With MXB1113, I cannot find anything about this. is this...

Hi All, I was wondering if ASTM B633 has examples of situations or environmental affects that may relate the appropriate Type Rating & SC rating? If not, any books or key website that would best use for reference? Thank you, FGY

Hello all, It seems like there are quite the issue now and days with dichromate. Does anyone know what has replaced it in ASTM B633 standard? i do not have access to it. What has replaced it or equivalent that can pass Type VI with 120HR minimum Salt Spray pass? FGY

Hi There, May i ask if anyone know what SAE MXB1113 is? i cannot figure out what it stands for and what it is exactly? Thank you, FGY

Hello, If Multiple parts are being tested for the same finish to meet a standard, how would this task be handled? Multiple parts will not be the same, but will vary in size, design, edges, corners etc. 1. Should testing be done for all different parts for validation? 2. Should I select 1-3...

Hello, With Stainless Steel 300 series, are there much difference in material properties? with the increase in values (e.g. 301, 302, 303, 304, 305 etc.) what deciphers them for your needs. I do not have access to expensive websites or books. Any tips will help. Thank you

Hi All, May someone please explain this call out? i am unsure what it means. Does this mean a tangent radius of .750 is blending its way to a straight line? does it also mean the other radius below is blended with 0.750? Thank you all

Hello All, I am outputting 108VAC, 120VAC, and 132VAC on the actuator, but the Voltage Amperage is staying consistent maybe +/-1. What would be the root cause? other actuators I'm testing has an increase VA by voltage increase. Assuming there are so many possibilities, but maybe a few big item...

I would like guidance on this material change. The new material (12L14) is the same but without Tellurium. Tellurium improves machinability and lead, but i've discovered it didn't matter for my sake. The material properties are similar, except the “Reduction in Area.” I am not too concern with...

Hi all, I am unfamiliar with this symbol (image below) being used for this drawing specifically. this is a round brass being machined down. Once machine, doesn't it remove material? doesn't the symbol represent you can do all sorts of processes, but without removing maerial? Can someone...

Hello, I am unsure, but is it a norm to put some sort of brass cutting oil + Mineral spirt on top of a finished zinc plated part to reduce rusting? is it necessary? Thank you, FY

Hi All, if a radius has a Max or Min radius call out, is it affected by the general tolerance table in the drawing? Thank you

Hello, What does this SYMBOL mean in a drawing? Can someone please help me understand?

Hello, I am new to actuators and trying to understand some definition. This gets confusing to me because i can't picture it in my head. can someone help me understand the difference? Example below 1. Rated Torque 2. Spring Return Torque 3. Stall Torque 4. Lower limit stall torque 5. upper...

Hello, I was wondering what this symbol represents marked in yellow. can someone help me understand the correct terminology for it?

Hello all, I am fresh to GD&T and was wondering what a datum on a hole represents and what does it describe back to me. Image below

Overall, I believe UV wax on screws is to protect from and prolong the life of a screw during high heat temps. Is there any other purpose and how critical is this feature? does it act more of a lubricant at the end of the day?

Hello, Which would be best to use for sheet metal? Thank you, FGY

Hello All, I was wondering if there is anyone out there that can help me understand the two processes. Is there a difference between the two? which is more reliable? Thank you, FGY