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Pump clearances

Pump clearances

Pump clearances

(OP)
In vertical multi stage condensate pump drawing, guide bearing has fit 120H8/f9. When I calculate it is clearance fit with
Min clearance: .036mm
Max clearance: 0.177mm

Where as in Pump instruction book of same vendor, nomianal clearances for guide bearing are as under
Min clearance : 0.15mm
Max clearance: 0.4mm

Kindly educate me whether my calculations are correct and if yes, then why two values are different?
If my calculations are wrong then what is mistake?

Daren!

RE: Pump clearances

Maybe the vendor doesn't known what they are doing.
As usual the first port of call should be the vendor - who else is better qualified to advise on their own product?

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

RE: Pump clearances

(OP)
Company has abandoned production.

Daren!

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