"A versatile process delivering consistent performance...
Thread milling is a process producing a screw thread by an annular thread cutting tool
moving in three axis. In order to thread mill, a CNC machining centre or turning centre must
be able to move simultaneously in three axis. The programming path is simple, there is no
need to have a cycle for thread milling. If you are unsure we can guide you on cutting data
and programming. Unlike tapping the torque applied is negligible, therefore enabling use of
high rpm on low power direct drive motors.
In order to help you decide, we have listed both positive and negative aspects of the process. These attributes are then objectively compared to tapping, although due to the variability of factors, the conclusions are not definitive but a general guide.
Excellent surface texture - no "lead in" allows full form threading to the bottom of a
hole - single cutter geometry for most materials - very small swarf chips - cutting
data independent from thread size - one cutter for a range of nominal diameters of constant
pitch for right and left hand helix - taper threads are easily cut - combine features such
as c/bore, thread chamfer, drilling.
Factors which may effect
the programming approach, cycle time or texture...
cut length exceeding 2xd - excessive tool "overhang" typ' above 4xd -
lack of work holding rigidity - thin wall section unclamped - spindle vibration
When do I threadmill or tap ?
This is subjective because of your situation, not just the application. We have summarised the
most likely situations, stating where thread milling becomes more effective...
We can advise on every application, considering all aspects of your requirement. Contact us.
Our range is the largest available, consisting of solid multi-fluted cutters in straight and helical flute. Through coolant is also available, both straight through and into the flutes. Deep hole milling is satisfied with runover shank and shell type.
Cutters are manufactured in sub-micro grain carbide and HSS3(8.5%Co, pm). All T-TECH products are supported by a comprehensive regrind service, including re-forming threads and removing badly damaged teeth!
We are undoubtedly the leading manufacturer of special cutters. Extremely competitively
priced and available in a matter of days. If the cutter specification is unsuitable,
such as too short a cut length, we will manufacture quickly. All threadforms are within
our capability.
ISO MJ UNIFIED UNJ WHITWORTH RP RC G NPS NPT NPSM NPSF NPSI NPT NPTF ANPT API ACME STUB TRAPEZOIDAL RADIUS KNUCKLE BA PG
and the list goes on!
Please view our standard range in carbide thread mills or HSS3 Thread Mills, or simply contact us.
Here is a guide to the
information required. Firstly the essential, then essential plus, enabling us to select the most suitable
thread mill for your application.
Essential... thread nominal diameter, eg: 10mm - pitch, eg: 1.25mm - threadform if
not already defined, eg: NPSM - length of full form thread - material being cut
Essential plus... access restrictions or "overhang" - work holding type - your priority whether cycle time, tool life or cost - typical batch size
Please contact us and we will ask the relevant questions. Technical assistance is always available, whether you chose tel, fax, E-mail, or would prefer a personal visit... See Contact Us.
