Our Tolerance Capabilities

(For floating and fixed gear pump bearings)

The following should be used as a general guideline of the capabilities that we at Truline offer.
Disclaimer:- This list in no way implies what the tolerances on any parts should be. It just describes what we at Truline are capable of holding.

The standard column represents 70% of our product, while the tightened column represents the remainder, which are priced higher due to supplemental procedures added to our standard, it does not mean they are routed through different machines. (Remember the tighter tolerances, while priced slightly higher, are well within our capabilities)

Please call to discuss any tolerances not shown or tolerances tighter than stated.
The tolerances are total indicator readings.

Standard (Standard Pricing) Tightened (Slightly higher pricing)

OD Diameter .0005” (+-.00025”) .0003” (+-.00015”)
Micro Finish OD 63 25

ID Diameter .0005” (+-.00025”) .0003” (+-.00015”)
Concentric to OD .0005” (+-.00025”) .0003” (+-.00015”)
Square to Gear Face w/in .0005” (+-.00025”) .0002” (+-.0001”)
Micro Finish ID (prior to coating) 32 16

Gear Face
Flatness .0005” .00005”
Square to bore or OD .0005” .0002”
Micro Finish Face prior to coating 32 16

Opposite Face
(Fixed Bearing only)
Parallel w/in .0005” .0002”
Square to bore or OD .0005” .0002”
Flatness .0005” .0001”
Micro Finish Faces 32 16

Flat dimension to OD .001”(Parts Lapped in at assembly) .0003”
Flatness .0005” .0001”
Square to gear face .0005” .0002”
Micro Finish 63 25

Eccentric throws (floating bearings)
Diameters .002” (+-.001”) .001” (+-.0005”)
True Position to Face / Bore / OD .001” (MMC) .0005” (MMC)

Face Dams / Traps .005” profile of a surface .0025” profile of a surface
Hole in Flat
True Position .004” .0015”
Slot in Flat .004” .002”

Dry Lube Final Thickness per side .0003” to .0012” .0003” to .001”
Dry Lube Micro Finish Bore 63 70% 32 70%
Dry Lube Micro Finish Face 32 70% 32 70%
Dry Lube Material Sandstrom 9A . / E/M Lube Lok 4253