Ideal for the execution of very deep and wide holes in bowls and vases in solid wood. The useful drilling depth is 250 mm. This operation allows to accelerate the processing times of the internal part of a piece, obtaining an effective and rapid emptying.
It consists of a steel body, available in two different sizes.
The smaller head is equipped with a Ø 55 mm insert, the larger one with a Ø 100 mm insert.
For the use of both heads it is necessary to purchase separately the hexagonal stem CM2, with the relative support for the tool holder of the lathe.
All applicable inserts, available in different sizes, are made of HSS18% W steel and can be re-sharpened.

Order No 4086 includes:
Boring bit body with insert Ø 55 mm (the stem is not included). It can mount the OPTIONAL knives from Ø 40 mm to 65 mm.

Order No 4087 includes:
Boring bit body with insert Ø 100 mm (the stem is not included). It can mount OPTIONAL knives from Ø 70 mm to 95 mm.

Order No 4088 includes:
Hexagonal stem CM2 and support with Ø 16 mm pin for the lathe tool holder Can be used with art. 4086 and art. 4087

Bit support
Creating a large diameter hole in the wood requires a lot of energy. To work in safe conditions and to ensure maximum drilling efficiency, insert the bit shaft into a support, provided with a Ø 16 mm pin, to be placed in the tool holder sleeve. The latter is able to absorb the effort of rotation and, at the same time, to guide the tip while advancing with the tailstock of the two or more steps necessary to perform the complete drilling. Adapters for larger lathes (OPTIONAL) are available.

Inserts in HSS
The centering slot facilitates the positioning of the plate in the tip body. The insert is secured by two retaining screws.

Technical data