Excuse me can flange three, why the general flange is four hole
In order to distribute the fastening force evenly, of course, the 4 hole can be made symmetrically. Three can
The flange is according to size and standard, with American Standard, German standard, national standard, Japanese standard, British standard and so on. Generally, 1/2 "-24" requires 4 holes at the minimum. For example, in ANSI B16.5, 24 of the flanges are 20 holes, which play a joint and fixation role. But the non-standard flange can be made according to the actual situation and requirements, no matter the number of holes, specifications, or thickness, PCD and so on, can be done as required. Therefore, the non-standard flange can be made as required 3 holes
Processing time is advantageous to the operation, usually is 4 multiples. 90 degrees, 45 degrees, 22.5 degrees, 11.25 degrees, these are good, and 60 degrees, 120 degrees, 72 degrees will need these tools.
