THE BIGGEST WOODEN BOWL
The largest turned wooden bowl measured 4.01 m (13.15 ft) in diameter and 1.03 m (3.37 ft) from base to rim. The bowl was made by Peter Andres and Werner Rumplmayr in Gurtis, Austria on 4 September 2005. The enormous cost of a giant lathe brought the idea to use a tractor as woodturning lathe.
Diameter: 4.01 m
Depth inside: 1.03 m
Depth outside (base to rim): 1.23 m
Girth: 12.6 m
Thickness of the wall: 16 cm
To hold in: 7,200 litres
Weight: 1200 kg
Volume: 2.56 m³
Kind of wood: Spruce (Pine)
Consumption of glue: 44 kg
Glue: Semparoc I 12 NV
To glue the bowl: 430 hours
Single segments: 486 pieces
Parts of base: 10 pieces
Time to turning the bowl: 20 hours
( across 3 days)
For the segmented bowl total of 450 hours of work had to be invested. 486 segments were glued with a 55 kg special glue.
Bowl was made from 9 m³ spruce wood
1700kg bowl was placed on a 136 hp tractor and it was spinning at ~60 rpm.
They only used gouges and held it with hands.
After all process they made about 300 kg of chips.