Crucible Chairpanzee Analog Computer

Item: CT-CAC

in stock In stock

£20.00 inc VAT


Product Description

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 maths for you with its simple, no-maths-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. 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 and tables. With the Chairpanzee, you can:

  • 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 (Lost Art Press 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 mortices.
  • 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.

The Chairpanzee was developed by Ed Sutton at FirstLightWorks in the UK and is printed and assembled in the United States. The Chairpanzee is compact (4” x 9¼”) and durable – it’s printed on .024” board stock with a tough gloss coating. The exterior is glued and secured with metal eyelets.

Instructions for using the Chairpanzee are printed on both faces of the tool, so you’ll never lose the instruction manual. The video shows the tool in use.


Collect in Store

This item is available for collection.

Home Delivery

UK mainland delivery from £4.50

check delivery cost

You Can Also...
ask a question

You may also like

Veritas Centre MarkerVeritas Centre Marker
Veritas Centre Marker
£26.95 inc VAT

Crucible Sliding BevelCrucible Sliding Bevel
Crucible Sliding Bevel
£255.00 inc VAT

Crucible GoDrillaCrucible GoDrilla
Crucible GoDrilla
£72.00 inc VAT

People who bought this also bought

Veritas Mk.II Honing GuideVeritas Mk.II Honing Guide
Veritas Mk.II Honing Guide
from £26.00 inc VAT
Veritas Narrow Router Plane BladesVeritas Narrow Router Plane Blades
Back In Stock
Veritas Narrow Router Plane Blades
from £19.00 inc VAT

Welsh Stick Chairs
Welsh Stick Chairs
£29.00 (VAT exempt)