Arbors are manufactured in accordance with DIN 69871 AD-B, MAS 403 BT AD+B, DIN 2080, ANSI-CAT, DIN  69893 hardened and ground to AT3 tolerance and the  ISO 26623-1 and are made of carburized steel.

Arbor sizes MHD’ 80, 110, and 140 are recommended for heavy milling operations and for bores deeper than 250 mm and exceeding 125 mm in diameter. Special arbors are available upon request.

Extensions of various lengths are available for each MHD’ size, which make it possible to optimize the desired machining depth.

Reductions are available for MHD’ components of a smaller size can be used by means of adaptor sleeves which allow greater interchangeability and ensure tool stability.

D’Andrea solves the deep-hole boring machining by means of a wide program of BMD carbide bars having diameter 16, 20, 25, 32 mm diameter, and ending with MHD’ arbor.

BMD bars are built in three different lengths for the machining of holes (length diameter ratio), whose depth is 6.3, 8, and 10 times the diameter/bar. On BMD bars can be mounted: TS double-bit roughing heads, TRD-TRC-TRM Testarossa finishing heads, PE chucking tools for ER collets.

The BLC balancing ring, with simple positioning of the two incorporated graduated counterweights, makes it possible to accurately and inexpensively balance the tool holder on which it is mounted.

The use of the BLC ring provides the following advantages:

• - improvement of accuracy and surface finish
• - a considerable extension of tool life
• - a considerable extension of the machining center spindle life
• - drastic reduction of vibrations and noise levels in the machining center.

The twin cutter rough boring tools are easy and extremely rigid thanks to the extensive serrated areas in contact between the bit holder seats and the heads, together with the constant distance between the seat clamping screw and the cutter.

How to use it? The diameter setting of the cutters should be carried out with a tool presetting bench. Two-bit holders are used for roughing operations involving heavy chip removal. It may include:

• two SSCC bit holders on the same plane and with the two cutting edges set at an identical radial distance for high feed rate roughing operations
• an SSCC bit holder and an SMCC bit holder not at the same plane and with the two cutting edges set at different radial distances for high cutting depth roughing operations
• the boring bars are fitted with a single bit holder for roughing and finishing operations involving normal chip removal.
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The TR-ELETTRA is a finishing head, where the radial displacement of the tool holder slide is viewed on a built-in digital display, providing the operator with maximum speed and accuracy of adjustment. The operating range of these heads is extensive: from 2.5 mm to 2,700 mm depending on the size of the head selected. The entire TR-ELETTRA'S range is also available as a kit, complete with all the accessories necessary for its correct use. TR-ELETTRA, uses the well-known D’ANDREA MHD modular system and the new PSC modular system as coupling systems, in accordance with the standard ISO 26623-1. The TR-ELETTRA is the digital evolution of the TRM, the famous D’ANDREA micrometer finishing head.

The TRM heads in the D’Andrea Testarossa line have a protective rustproof coating. High precision work to IT6 tolerance, with excellent surface finish, is achieved using TRM boring heads. These are very sensitive and radial correction of 1 micron can be effected directly on the machine and easily read on the Vernier scale.

The BPS boring system crossbars cover a working area from ø 200 - 2700 mm. It is constructed in aluminum and mounted on a steel double-bit plate.

The BPS double-bit crossbars cover a working area from ø 200 - 2700 mm. The BPS double-bit crossbars are constructed in aluminum and mounted on a steel double-bit plate.

High precision work to IT6 tolerance, with excellent surface finish, is achieved using TRC boring heads. These are very sensitive and radial correction of 5 microns can be effected directly on the machine and easily read on the Vernier scale.

The twin cutter rough boring tool allows both roughing and high precision finish thanks to their rigidity and the sensitivity of the sliding mechanism which can achieve radial correction of 5 microns. This can be carried out directly on the machine and easily read on the Vernier scale.

The TRD head’s main advantage is the centesimal head adjustment. 

The Testarossa kits are supplied in a box with a wide range of tool holders, tools, inserts, and service spanners.

The complete program of D’Andrea modular adapters with MHD connection, which satisfies the various processing needs related to milling, drilling and tapping.
Combi-tool holders Weldon (DIN 1835 B) and Whistle Notch (DIN 1835 E) with axial adjustment screw.

PE: Collet chucks to DIN 6499 sizes ER 11, ER 16, ER 20, ER 25, ER 32, ER 40, including axial adjustment screw. Supplied without collets.
AM: Tapping chuck holders for high production thread cutting, length compensation in response to tension and compression. With quick-change clutch for tap holders with or without torque limitation.
PF: Universal milling cutter-holders for disc cutters and facing cutters.
CM: : Tool Holders with internal morse taper for tools with the threaded bore to DIN 228-A and tang to DIN 228-B.
B16: Drill chuck-holders with internal taper B16 to DIN 238.
NS: Semi-finished tool holders for special tools with hardened and ground MHD’ coupling part and cylindrical part with hardness HRC 22-25.
ACR: Coolant chucking tools.

The complete program of D’Andrea modular adapters with MHD connection, which satisfies the various processing needs related to milling, drilling and tapping.
Combi-tool holders Weldon (DIN 1835 B) and Whistle Notch (DIN 1835 E) with axial adjustment screw.

PE: Collet chucks to DIN 6499 sizes ER 11, ER 16, ER 20, ER 25, ER 32, ER 40, including axial adjustment screw. Supplied without collets.
AM: Tapping chuck holders for high production thread cutting, length compensation in response to tension and compression. With quick-change clutch for tap holders with or without torque limitation.
PF: Universal milling cutter-holders for disc cutters and facing cutters.
CM: : Tool Holders with internal morse taper for tools with the threaded bore to DIN 228-A and tang to DIN 228-B.
B16: Drill chuck-holders with internal taper B16 to DIN 238.
NS: Semi-finished tool holders for special tools with hardened and ground MHD’ coupling part and cylindrical part with hardness HRC 22-25.
ACR: Coolant chucking tools.