Berea Precision Pen Mandrel Shaft

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A mandrel is a round steel rod that you slide the wood blank with the brass tube inserted onto. We have two sizes A & B. 

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  • $8.00
  • Weight
    4 oz
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Berea Precision Pen Mandrel Shaft

A mandrel is a round steel rod that you slide the wood blank with the brass tube inserted onto. For the Berea Arbor System, two sizes are available - A & B. 

The A mandrel (sometimes called a "7mm" mandrel) which is 0.247 +0 -0.002 inches in diameter and and other mandrel which has a larger diameter, the B mandrel. This is 0.291 +0 -0.002 inches in diameter. The B mandrel  is used on some kits because the thicker diameter helps prevent whip while turning and allows for a much better result.This shaft will work with either of the Morse taper drivers, but only with the like size (A or B) bushings.

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Product questions

  • Daniel Frechette
    May 15, 2020, 01:08 PM

    Can this mandrel be used as a replacement on the PSI PenPal mini lathe? The one that came with the lathe is not threaded, the lathe has a collet nut headstock.

    May 17, 2020, 06:32 PM

    Hi Daniel, This will work on most all mini and midi lathes used for pen turning, but on the Micro Penpal lathe I can't advise you. We don't handle that lathe, and there could be some restrictions on it that we are not familiar with. PSI (the maker of the penpal) advises using this mandrel as a replacement - I hope that helps!

  • Hank Shannon
    Apr 30, 2020, 07:29 PM

    Is this 7mm mandrel? What is the thread size?

    May 1, 2020, 11:47 AM

    Hi Hank! Berea's A mandrel is the standard 7mm size. The B mandrel is a thicker rod, which helps in preventing warping. However, the B mandrel requires a larger thruput hole in the bushings (ie Berea's "B" bushings). Standard bushings will not fit. You can see the matching knurled nut for these mandrels here -