Calculation of distance between two adjacent holes on P.C.D. 

You can use the radius to the outside diameter... for example OD is 200 radius is 100 obviously.. you need your PCD to be on 80 so you just need to substact 20 of the OD.. I'm presuming you are talking about parts being made on a lathe etc..

I can explain, but before, give me detail about pipe, or Pipe drawing.

for connecting two hose pipe., mostly water pipe, a sealing made of rubber is also putted in between flanges for preveting from.leakage.

Because... PCD lies within ths Holes.

MechTechStation yeah..that is what i m asking..if R is not given then it is not poosible to calculate H.. You can not decide the position of PCD or holes arbitrary. am I correct and clear.?

see in the formula PCD= H* sin/n. where n is the no. of holes here, H & PCD both are unknown which is not possible to get from single equation.

Dear sir,... because H is related, You can see here... for PCD ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gRp22_Rn0Vo.html

@@RajanKumar-xc8pm exactly what I was wondering. Where did the 160mm come from.

yes, i m making a video on that. sorry for late replying.

Ammad Anis ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gRp22_Rn0Vo.html

Ammad Anis ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gRp22_Rn0Vo.html

If you want to calculate the distance bet. Corners of a nut then its always 2D, here D is diameter of bolt, this you can simply see from any mechanical engg. drawing book, all calculations for nut, bolt and rivets is given.

THANK YOU , I LOVED TO SHARE. GIVE ME SOME SUGGESTION FOR MORE INTERESTING TOPIC OR MAKING VIDEOS.

John Perez drive.google.com/file/d/0B4eRrlxX1yTSNWRkWUIxZDNQX1k/view?usp=drivesdk

John Perez ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gRp22_Rn0Vo.html

Right angle triangle?

really? i will fix it, i dont want to give any touble.

i ll give you... drop your email

50÷3

JUST WAIT TWO DAYS, IN MY NEXT VIDEO...I AM ABOUT TO ADD THAT CONTENT THERE,

i ll share the " Rule " and all the info in my next videos, just this in two days

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gRp22_Rn0Vo.html

xzcabhishek drive.google.com/file/d/0B4eRrlxX1yTSNWRkWUIxZDNQX1k/view?usp=drivesdk

xzcabhishek ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gRp22_Rn0Vo.html

Joe West I m glad to hear you, i ll try to have another video with my voice. And And if you have any topic, pls let me know, i ll gather out info and research and will make video for that. keep learning.

If you remember me please send me a link if you ever make that video I'm new to Machining I'm trying to duplicate an adapter plate on my leg to fit a 4 jaw Chuck I also have a small Mill in a rotary cable but I'm not about to use transfer punches to figure out where are these both holes are supposed to go to match the existing adapter I just don't know enough to know the proper way to do it thank you

mahesh gaikwad lets take same pcd.. =160mm no of holes =3 H = sin@ x PCD @ = angle btw two / 2 @ = 120*/2 = 60* so, H = sin60* x 160 = 0.8660 x 160 =138.56 mm

mahesh gaikwad download the excel sheet from there you can calculate your valus just putting the pcd and no of holes. simple

mahesh gaikwad drive.google.com/file/d/0B4eRrlxX1yTSNWRkWUIxZDNQX1k/view?usp=drivesdk

mahesh gaikwad ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gRp22_Rn0Vo.html

thank you sir