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3100 Series Small Displacement Roller Bearing Gear Pump

Description & Features

Designed for small displacement hydraulic applications, the Permco 3100 Series Small Displacement Roller Bearing Gear Pump delivers reliable fluid transfer performance in a compact form factor. Roller bearing construction supports consistent shaft load handling and contributes to extended service intervals under demanding duty cycles.

Built by Permco, a recognized manufacturer of heavy-duty hydraulic gear pumps, this unit fits within the 3100 Series platform, which is commonly used in mobile and industrial hydraulic circuits requiring dependable flow at moderate displacement. The roller bearing configuration distinguishes this pump from bushing-type alternatives, making it well suited for applications where shaft side loads are a design consideration.

SKU: P3100A085ADZI17-

Supplier Part Number (MPN): P3100A085ADZI17-

Alternate Part Numbers: P3100A085ADZI17-55

Specifications

Alternate Part Numbers Alternate Part Number P3100A085ADZI17-55	Brand Permco Inc.	Brand Permco	Pack Size 1.00	UOM EA	Supplier Part Number P3100A085ADZI17-	Product Weight 0.50 lbs

Product Questions & Answers (3)

Question by: Hank H on Sep 21, 2025, 9:02 AM

got a setup where the pump sees some side load on the shaft. is this 3100 series one of them roller bearing pumps or just bushings

Answer by: Customer Support on Sep 22, 2025, 12:59 PM

Roller bearing construction is one of the main differences on this 3100 Series pump. That setup is meant to handle shaft side loads more consistently than a bushing style gear pump, which helps in applications where side load is part of the design.

Question by: Brenda L on Jul 9, 2025, 1:47 PM

Been running bushing-type gear pumps for years and had nothing but grief with shaft side loads wearing them out early. This roller bearing setup on the 3100 Series supposed to hold up better for that kind of thing?

Answer by: Customer Support on Jul 11, 2025, 6:17 AM

Roller bearing construction handles shaft side loads considerably better than bushing-type pumps, so yeah, that wear pattern you're dealing with should be a lot less of a problem here. Bushing pumps can struggle when there's consistent lateral force on the shaft, and the 3100 Series was built with that exact limitation in mind. For applications where side loading is part of the operating reality, the roller bearing configuration is the more durable choice long term.

Question by: Ralph M on Dec 23, 2025, 10:12 AM

What kind of hydraulic applications does this Permco pump work best in?

Answer by: Customer Support on Dec 24, 2025, 12:54 PM

This Permco 3100 series gear pump is designed for small displacement hydraulic applications where you need reliable fluid transfer. It's built to hold up under demanding use, thanks to the roller bearing construction.