Patent U.S. # 5317853 / CAN. # 2115722
For 5mm Spaceballs
Spaceballs need a minimum spacing of 3mm per side. If you cut your stiles and
crossers, as you would normally do for your panel doors......then cut your panels
3mm smaller on all sides. This will leave the minimum space for proper
installation and the Spaceballs will be able to expand and contract as needed.
Please Note: If you are using a curved bottom dado slot this spacing
must be increased to a minimum of 4mm on all sides
We recommend 2 balls per side ( possibly 3 if the door is very tall or wide). The
Spaceballs will be compressed when the door is assembled and will expand and
compress with the movement of the wood.
It is advisable to keep the humidity
content of the wood under consideration when constructing your doors.
Flat Bottom Dado: Curved Bottom Dado:
Example : if the Rail measures 30 cm Example: if the Rail measures 30 cm
the Panel should be 29.4 cm the Panel should be 29.2 cm
"DO NOT OVER-COMPRESS"
Copyright © 1997 [
Space Balls]. All rights reserved.
Revised:November 04, 2010.