• Range: 152.4mm" To 409.58mm
• The Ammco 8500 series Drum Micrometers are famous for their durability, just like our brake lathes.
• The 8500 series are off set to allow for measuring both on the bench or while the drum is still mounted on the lathe
• All three models can be owner calibrated in the 9582 checking fixture sold separately
• The addition of an 8539-50 (90853950) extension shaft increases the micrometers measuring range to 152.4mm - 660.4mm for truck applications
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