Hole sizes & fits, done right
All sizes

F623 bearing housing bore size

An F623 bearing seats in a Ø10.008 mm housing bore for a drop-in slip fit (ISO 286 H7), or Ø9.989 mm for a light press fit (N7).

F623Deep-groove ball bearing
bore Ø 3 mmhousing Ø 10.008 mm
H7 slip-fit housing pocket — interactive in the app

Housing bore

ISO 286 on the outer Ø
Slip fit (H7)
10 to 10.015 mm
Ø10.008 mm
Press fit (N7)
9.981 to 9.996 mm
Ø9.989 mm

Bearing dimensions

Deep-groove ball bearing
Bore Ø
the shaft seat
3 mm
Outer Ø
seats in the housing
10 mm
Width
4 mm
Flange Ø
11.5 mm
Flange thickness
1 mm
These are standard reference numbers. Every machine prints and cuts a little differently — set a hole to  Ø5.00 and it might land at Ø4.95. In the FitCheck app you calibrate your machine once, and every dimension here auto-corrects to match it — plus tolerance bands, more insert series, and full offline use.
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Which housing fit do I want?

A bearing's outer ring is toleranced 0/−Δ per ISO 492, so the housing bore decides the fit. An H7 bore leaves clearance: the bearing drops in by hand and needs a shoulder or circlip to stay put — the standard choice when the outer ring is stationary and the shaft rotates. An N7 bore gives light interference: the seat itself holds the bearing captive, at the cost of needing press force and a little preload.

Printing the pocket?

A printed housing rarely comes out at the commanded size, and a bearing pocket is exactly where that error shows — a few hundredths undersize turns a slip fit into a press fit, and oversize lets the outer ring spin in the bore. Measure your machine's error once and every number on this page moves with it.

Metric clearances per ISO 273 · imperial per ASME B18.2.8 · heat-set pockets per CNC Kitchen · bearing housing seats per ISO 286. Reference only — verify before you cut.