⚙ GD&T / Assembly Fit

GD&T Fit Calculator

Shaft and hole assembly fit analysis. Enter nominal size with tolerances to get clearance, interference, or transition fit — with max/min values instantly.

Clearance Fit Interference Fit Transition Fit ASME Y14.5
⌀
Hole (Internal)
mm
mm
mm
⬤
Shaft (External)
mm
mm
mm
Hole MMC
-mm
Hole LMC
-mm
Hole Tol.
-mm
Shaft MMC
-mm
Shaft LMC
-mm
Shaft Tol.
-mm
Max Clearance
-mm
Min Clearance
-mm
Fit Range
-mm
Tolerance Visualization
Hole ⌀ -
Shaft ⬤ -
Formulas Used
Hole MMC (smallest hole) Nom + Lower Dev
Hole LMC (largest hole) Nom + Upper Dev
Shaft MMC (largest shaft) Nom + Upper Dev
Shaft LMC (smallest shaft) Nom + Lower Dev
Max Clearance Hole LMC − Shaft LMC
Min Clearance Hole MMC − Shaft MMC

About This Calculator

Shaft-hole assembly fit real machining mein sabse important concept hai. Ek wrong fit matlab ya toh part assemble hi nahi hoga (zyada interference), ya phir loose play hogi (zyada clearance). Dono cases mein rejection aur rework.

Yeh calculator MMC aur LMC boundaries calculate karta hai, phir automatically determine karta hai fit type: clearance (dono limits positive), interference (dono negative), ya transition (mixed). ISO 286 aur ASME B4.1 standards ke formulas use hote hain.

Part of TaskJunction — free mechanical engineering calculators for Indian engineers and students.

Vaibhav Dhokpande, Mechanical Engineer & Developer, TaskJunction