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NPA 30/2017 INCH


Thread Milling Heads with the MULTI-MASTER Connection


ISCAR has modified most of the thread milling heads with the MULTI-MASTER connection to increase application and efficiency options. New milling heads have been added for the production of wider thread options.

ISCAR has changed the .472” (12 mm) and larger diameter thread milling head clamping method by replacing the clamping flats with a Torx cavity on the frontal face. The Torx key reliably secures the MULTI-MASTER thread milling heads and reduces the risk of overtightening.



(1) Order separately

In many cases the frontal clamping method is more convenient for the machine operator. Frontal clamping enables the production of a shorter head, to reduce the overhang of the milling head from the shank. This substantially increases the MULTI-MASTER tool’s stiffness, reducing vibration potential and increasing productivity.


Long Short

The Torx clamping design contributes both to performance and maintenance. The MULTI-MASTER thread milling heads can be used on any of the large variety MULTI-MASTER steel, carbide and heavy metal shanks with the proper thread connection size.
Another advantage is that the thread milling head can be replaced on the machine without having to set-up the edge location, substantially saving time.

The following three thread milling heads have been modified:

Attached is a list of current thread milling heads and the new items that will replace them once their stock is depleted.

Current Items New Items
5605514 MT 12D8 16UN-MMT06 908 3315744 MT12D10 16UN-MMTT06 908
5605517 MT 15D12 10UN-MMT08 908 3311810 MT15D13 10UN-MMTT08 908
5667187 MT 16C12 8UN-MMT08 908 3311813 MT16C12 8UN-MMTT08 908
5605518 MT 16C11 9UN-MMT08 908 3311812 MT16C11 9UN-MMTT08 908
5605516 MT 16E12 12UN-MMT08 908 3311816 MT16E13 12UN-MMTT08 908
5605515 MT 16E12 14UN-MMT08 908 3311817 MT16E13 14UN-MMTT08 908
5605505 MT 12D7 1.5ISO-MMT06 908 3301659 MT12D9 1.5ISO-MMTT06 908
5605507 MT 12D8 2.0ISO-MMT06 908 3301660 MT12D10 2.0ISO-MMTT06 908
5605506 MT 16F12 1.5ISO-MMT08 908 3311819 MT16F12 1.5ISO-MMTT08 908
5605508 MT 16E12 2.0ISO-MMT08 908 3311818 MT16E12 2.0ISO-MMTT08 908
5605509 MT 15E12 2.5ISO-MMT08 908 3311811 MT15E13 2.5ISO-MMTT08 908
5605510 MT 16C12 3.0ISO-MMT08 908 3305422 MT16C12 3.0ISO-MMTT08 908
5605521 MT 16D11 11W-MMT08 908 3311814 MT16D11 11W-MMTT08 908
5605520 MT 16D12 14W-MMT08 908 3311815 MT16D12 14W-MMTT08 908

Note: It is important to follow the recommended clamping torque instructions as uncontrolled clamping torque can sometimes cause performance problems on MULTI-MASTER heads. Over-tightening can cause MM thread breakage, while insufficient clamping torque can cause vibrations, drastically reducing tool life and part accuracy.
ISCAR offers the means to actually control the recommended clamping torque setting. The required clamping torque can easily be set on a handle with a scale window that displays the set torque value. For further information, please refer to NPA 29-2016.

Identification Code

MT 10 D 6 0.75 ISO MMT05
MULTIMASTER Thread Mill Cutting Dia. No. of Flutes Cutting Length Pitch Thread Profile ISO UN G (55°) Connection Size

* For thread milling heads with .472” diameter and larger

Carbide Milling Heads with a Threaded Connection,
for Internal and External 55° BSW Thread Profile
• For thread milling heads with .472" diameter and larger use Torx clamping keys
• Do not apply lubricant to the threaded connection

Carbide Milling Heads with a Threaded Connection for Internal ISO Metric Thread

Carbide Milling Heads with a Threaded Connection for Internal UN Thread Profile
• For thread milling heads with .472" diameter and larger use Torx clamping keys
• Do not apply lubricant to the threaded connection

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