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Model WD-7 Quincunx Board

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  • Model WD-7 Quincunx with Adjustable Pin Block
35.00 LBS
Calculated at checkout

 Product Description

1½ x 14½ x 28 inches
Adjustable Pin-Block - Makes 4 Different Distributions
3 gates

The top part of the quincunx has a reservoir for holding the beads. The bead release lever will drop five beads with every stroke, or a single bead can be discharged. The moveable funnel, which represents adjustments in a process or a shift in the mean, is spring loaded to hold it in position until it is moved. In control chart terms, a shift in the funnel is an 'assignable cause'. The pins in the pin block, simulate the 'chance causes' of variation in a process. The adjustable pin block can make four different distributions.

The Quincunx is designed so that the pin block slides in from the side into a mitered slot, thus preventing binding were the wood to swell. Each pin is accurately located and securely imbedded in its plastic base. The channels of our units are painted white for high visibility in a classroom session. Each WD-7 Quincunx also has three gates which hold the bead distributions in place for comparison. The sturdy Plexiglas face can be marked with water-based transparency markers or chart-pack tape to depict tolerance or size denominations.


  • Smaller and smoother gate locks
  • An improved funnel that is spring loaded to hold it in place
  • An easel stand that locks open
  • The ability to simulate four different statistical distributions with a single pin block

Note: All products may be ordered directly from our sales office by emailing us at sales@qualitytng.com or calling 248-641-7030.

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