SEARCH our FREE online woodworking library

Woodworking Tool Manufacturers

Browse Categories

Chairpanzee Analog Computer

Chairpanzee Analog Computer, 433256
Chairpanzee Analog Computer, 433256Chairpanzee Analog Computer, 433256Chairpanzee Analog Computer, 433256Chairpanzee Analog Computer, 433256
Chairpanzee Analog Computer
Highland Item # 433256

Price : $19.00
In Stock


Detailed Description

Chairpanzee Analog Computer

Chairmaking is complex enough without having to worry about the trigonometry used to calculate the drilling and sighting angles for a chair’s legs and spindles. The Chairpanzee does all the math for you with its simple, no-math-needed interface. Simply slide the tool’s interior card so the splay you desire appears in its top window. Choose the rake you wish in the window below, and the Chairpanzee calculates the sighting angle. Flip the Chairpanzee over, and you’ll see the drilling angle (called the "resultant") displayed. The Chairpanzee is ideal for anyone who works with compound angles for chairs, stools, or tables.

  • Use photos of antique pieces to calculate the sightline and resultant angles so you can copy a classic piece, or merely swipe the angles for your own interpretation.
  • Use construction drawings or models (we make models with wire clothes hangers for the legs) to design entirely new pieces of furniture and easily figure out how to drill the compound mortises.
  • Learn the relationship between rake and splay at a deeper level than plugging numbers into an equation. The Chairpanzee shows you how small changes in rake and splay cascade through a design. Sometimes small changes make little difference. Sometimes they make huge differences.
  • Instructions for using the Chairpanzee are printed on both faces of the tool, so you’ll never lose the instruction manual.

The Chairpanzee was developed by Ed Sutton at FirstLightWorks in the U.K. and is printed and assembled in the United States. The Chairpanzee is compact (4" x 9-1/4") and durable – it’s printed on .024" board stock with a tough gloss coating. The exterior is glued and secured with metal eyelets.


The Chairpanzee Analog Computer

Product Warnings


This product may expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Please read our Proposition 65 warning.
For more information, see

Related Products

Dial Protractor 168072
Dial Protractor
Price: $64.99
Highland Woodworking Social Media
Shopping Cart
Your cart is empty.

Woodworking Gift Certificate

Woodworking Tool Catalog
FLIP thru our latest Woodworking Tool Catalog
The Highland Woodworker TV Show
Watch the Highland Woodworker TV Show

Woodworking Tool Clearance

Search Shopping Lists
Enter name to search for wish list