How spread sizing works
Why OD × 1.05 beats guessing by tonnage nicknames.
Puller jaw-spread sizing
3-jaw gear puller size by part OD
Measure bearing, gear, or pulley outside diameter. Match a 3, 4, 6, or 8 in max-spread class — or NO_MATCH.
Puller jaw-spread sizing
Result
Required spread = OD × 1.05. Smallest of 3 · 4 · 6 · 8 in max spread, or NO_MATCH above 8 in.
From measurement to decision
Open the calculator
Same tool with worked checks.
3 vs 4 vs 6 vs 8 in
When each class fits.
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