Clearance for reaming the coupling of reciprocating compressors
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We have two compressors whose coupling bolts are shear bolts that require reaming; the bolt diameter is 45 mm. What is the typical reaming allowance? The actual bore diameter is 44.7 mm, with a reaming allowance of 0.3 mm. I’m not sure if this is appropriate The machining manual states that the allowance for reaming should be 1% of the hole diameter. What impact does the amount of reaming allowance have on the quality of reaming?
Why isn’t anyone answering? Hi!
0.3mm is generally suitable; too small a pore size will result in deviations from the specifications, while too large one makes twisting difficult
If the allowance is too small, the precision cannot be achieved; if it is too large, it increases the workload.
The torque transmission in reciprocating compressors relies on shear force; the two work together, and reaming is required
The reaming allowance depends not only on the size of the hole to be reamed but also on the positional tolerance between holes; the allowance left for reaming must not be less than this positional tolerance. For a hole diameter of 45, the distance between two holes should be over 500, so an allowance of 0.3 is appropriate. If too large an allowance is used, it may be advisable to employ rough reaming followed by fine reaming