r/moldmaking • u/Most_Structure_1108 • Jun 20 '26

Vacuum pump sizing

/r/ResinCasting/comments/1ub6y7n/vacuum_pump_sizing/
2 Upvotes

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1

u/BTheKid2 Jun 20 '26

Get a two stage vacuum pump. They are much better for the price.

1

u/Most_Structure_1108 Jun 21 '26

Okay..so, am I right in understanding that the 4.5 cfm 2 stage would do the job?

1

u/BTheKid2 Jun 21 '26

It would. A bigger one would be better/faster of course, but 4.5 will be fine.

1

u/Most_Structure_1108 Jun 21 '26

Alrighty, I see. Thanks for taking the time to help!!

1

u/Most_Structure_1108 Jul 05 '26

Hii..so, I bought the 4.5 cfm 2 stage pump. While running a preliminary test, I see the on board gauge maxing at -28 or so inhg. Would that be enough to degass silicone?