Bellsy
Member
I gave this Badger Brush a go and since there was no available mandrel I decided to design my own. One is for Acrylic handles and the other is for Wooden handles. Sorry about the poor picture quality. The brushes and AcryIic blank used were purchased through William Wood-write or Pen Blanks.ca The Wooden handle is Bicote.
Mandrel specs.....
1/2" dia. arbor for collet chuck.
3/4" dia. x .310" long arbor for blank to fit over.
5/16" - 18 threaded insert to attach blank (Acrylic) 1/4" drill for pilot hole of thread.
5/16" dia threaded insert to attach blank (Wood) 1/4" pilot hole in blank.
Drill a 3/4" hole 5/16" deep into the blank with a forstner bit. Then drill the pilot hole 7/8" deep for the Wood blanks and 1" deep for the Acrylic blanks. For the Acrylic blanks tap the blank with a 5/16 - 18 tap.
Mount your blank on the mandrels and start turning. Remember that the length of the larger arbor is .310" in length and your blank was drill @ 3/4 deep. Therefore the end of the blank will need to be trimmed back during turning until it reaches the 3/4" x .310" portion of the mandrel.
Note: I purchased 3" long hanger bolts which have a machine screw end 1 1/2" long and a wood screw end 1 1/2" long. For the Acrylic mandrel I use only the 1 1/2" portion of the bolt. For the Wood mandrel I use half of the machine screw end (3/4") and half of the wood screw end. The hanger bolts are threaded into the mandrels.
There is a second diameter @ 5/8" on the arbor that allows access to the end of the blanks face. This allows optional turning ideas to be used while turning the handles. i.e. a flat end or a tapered end. The handles shown are tapered down to the arbor leaving a sharp edge when removed from the arbor after finishing.
You can make the arbors any length desired and the prototypes shown below are @ 3" long over all, including the screw which is 3/4" in length.
Comments and suggestions welcomed.
Dave
Mandrels
Brushes
Mandrel specs.....
1/2" dia. arbor for collet chuck.
3/4" dia. x .310" long arbor for blank to fit over.
5/16" - 18 threaded insert to attach blank (Acrylic) 1/4" drill for pilot hole of thread.
5/16" dia threaded insert to attach blank (Wood) 1/4" pilot hole in blank.
Drill a 3/4" hole 5/16" deep into the blank with a forstner bit. Then drill the pilot hole 7/8" deep for the Wood blanks and 1" deep for the Acrylic blanks. For the Acrylic blanks tap the blank with a 5/16 - 18 tap.
Mount your blank on the mandrels and start turning. Remember that the length of the larger arbor is .310" in length and your blank was drill @ 3/4 deep. Therefore the end of the blank will need to be trimmed back during turning until it reaches the 3/4" x .310" portion of the mandrel.
Note: I purchased 3" long hanger bolts which have a machine screw end 1 1/2" long and a wood screw end 1 1/2" long. For the Acrylic mandrel I use only the 1 1/2" portion of the bolt. For the Wood mandrel I use half of the machine screw end (3/4") and half of the wood screw end. The hanger bolts are threaded into the mandrels.
There is a second diameter @ 5/8" on the arbor that allows access to the end of the blanks face. This allows optional turning ideas to be used while turning the handles. i.e. a flat end or a tapered end. The handles shown are tapered down to the arbor leaving a sharp edge when removed from the arbor after finishing.
You can make the arbors any length desired and the prototypes shown below are @ 3" long over all, including the screw which is 3/4" in length.
Comments and suggestions welcomed.
Dave
Mandrels
Brushes
