For thread forming｜ Swiss CNC lathes
Swiss CNC lathes threading
In thread whirling, the whirling head is tilted to a specific helix angle, the cutter is rotated at high speed, the bar stock (c axis) is rotated at a low speed, and the pitch (z axis) is the feed.
The inserts shear the material which enables single pass thread forming.
Machining multi-lead tread forms has many process requirements.
So it is important to contact us to discuss: mechanical specifications, spindle specifications, insert specifications, tooling specifications.
| Whirling cutter speed | Main spindle speed | Feed rate |
|---|---|---|
| 1,000 – 4,000 min-1 | 10 – 30 min-1 | Same as thread lead = pitch |
| Workpiece diameters | Work materials |
|---|---|
| For cutter with ID of φ12mm φ.472inch | Pure titanium, titanium alloys, SUS316, etc. |
| Worm gear | ||
|---|---|---|
| Work material : | Brass | |
| Bar stock diameter : φ7 φ.276” | Major diameter : φ6 φ.236” | Minor diameter : φ4 φ.157” |
| Number of start : 2 | Helix angle : 10.1° | Hand of thread: left |
| Main spindle speed : | 30min -1 | |
| Whirling cutter speed : | 3,200min -1 | |
| Lead = Feed : | 2.8mm/rev .110 IPR | |
| NTK Thread Whirling 9 teeth |
25 seconds
|
|
| Single point |
50 seconds
|
|
By replacing the single point threading tools with a thread whirling system the machine time for threading operation is greatly reduced and the total cycle time for the part is cut by 50%.
| Pin | ||
|---|---|---|
| Work material : | Hastelloy | |
| Bar stock diameter : φ3 φ.118” | Major diameter : φ1.5 φ.059” | Minor diameter : φ1.1 φ.043” |
| Number of leads : 1 | Helix angle : 4.3° | Hand of thread: right |
| Main spindle speed : | 20min -1 | |
| Whirling cutter speed : | 2,250min -1 | |
| Lead = Feed : | 0.3mm/rev .012 IPR | |
| NTK Thread Whirling 9 teeth |
600 pcs / corner
|
|
| Single point | 100 pcs / corner | |
By replacing the single point threading tools the threading system significantly improved tool life machining the difficult to cut Hastelloy material.
| Bone screw | ||
|---|---|---|
| Work material : | SUS316 | |
| Bar stock diameter : φ8 φ.314” | Major diameter : φ3.45 φ.135” | Minor diameter : φ2.67 φ.105” |
| Number of leads : 2 | Helix angle : 7.5° | Hand of thread: right |
| Main spindle speed : | 23min -1 | |
| Whirling cutter speed : | 2,000min -1 | |
| Lead = Feed : | 1.24mm/rev .048 IPR | |
| NTK Thread Whirling 9 teeth |
2,600 pcs / corner
|
|
| Competitor’s Thread Whirling 6 teeth |
1,000 pcs / corner
|
|
NTK thread whirling inserts achieved 2.6 x longer tool life compared to the competitor’s thread whirling inserts.
| Bone screw | ||
|---|---|---|
| Work material : | SUS316 | |
| Bar stock diameter : φ6.35 φ.250” | Major diameter : φ3.23 φ.127” | Minor diameter : φ2.2 φ.086” |
| Number of leads : 1 | Helix angle : 8.5° | Hand of thread: right |
| Main spindle speed : | 15min -1 | |
| Whirling cutter speed : | 2,250min -1 | |
| Lead = Feed : | 1.27mm/rev .005 IPR | |
| NTK Thread Whirling 9 teeth |
1,200 pcs / corner
|
|
| Competitor’s Thread Whirling 12 teeth |
1,000 pcs / corner
|
|
| Competitor’s Thread Whirling 3 teeth | 400 pcs / corner | |
NTK whirling inserts achieved 1.2 to 3 times longer tool life compared to the competition.
For more information about this product, visit our online e-catalog, or download the catalog/product report