Press / Interference Fit Calculator

Calculate interface pressure, hoop stress, assembly force, and holding torque for cylindrical press fits

Hub

Shaft

Fit Parameters

-
°C

Fits

Clearance
Transition
Interference
Design looks good
Within Limits
0.00
Assembly (Press) Force (kN)
0.00
Hub Hoop Stress (at bore) (MPa)
0.0
Holding Torque (N·m)
SECTION VIEWSteel 1018HUB OD: 80.00 mmBORE: 50.00 mmSHAFT: 50.05 mmHub Hoop Stress0.00 MPa (0% of 370.0 MPa yield)0%50%75%100%SIDE VIEWL = 40.0 mmFLine-to-lineδ = 0.0000 mm (0.0 μm)p = 0.00 MPaF = 0 NAA

Design Results

Max Hoop Stress
0.00 MPa
Safety Factor (Hub)
0.00
Safety Factor (Shaft)
0.00

Tolerance Band Impact

IT7 bore (25 μm) + IT6 shaft (19 μm) = ±22.0 μm

MinNominalMax
δ (μm)28.050.072.0
Force (kN)32.9758.8784.77
Torque (N·m)824.21471.72119.2

Temperature Effect

Sensitivity+0.00 μm/°C

Set temperature differential above to see effect on interference

Created by Catlynn Nguyen & Jie Chai · 2026