Step coolant drills combine multiple diameters and internal coolant, helping machine stepped holes while controlling chips and heat in one setup.
Step coolant drills are custom carbide drills that machine two or more diameters while delivering coolant through the tool body. They are used when a part needs a stepped hole, counterbore, shoulder or pilot-and-size feature and the buyer wants to reduce tool changes while keeping chips under control.
Step coolant drill links
Design points for step coolant drills
- Each step diameter, step length and tolerance must be clearly defined.
- Shoulder angle and bottom geometry affect burrs and surface quality.
- Coolant hole exit position must support the deepest cutting zone.
- Flute form must evacuate chips across diameter transitions.
- Coating and edge preparation should match the work material.
| Application | Why use a step coolant drill | RFQ note |
|---|---|---|
| Counterbore or stepped bore | Combines drilling and sizing in one tool | Send all diameters and shoulder requirements. |
| Deep stepped hole | Internal coolant helps protect the transition area | Send coolant pressure and depth by step. |
| High-volume production | Reduces tool changes and coaxiality risk | Send annual quantity and inspection target. |
Send your step coolant drill drawing with diameters, step lengths, material, tolerance, coolant pressure and annual quantity. KYTOOLS will review manufacturability and quote.
标签
step coolant drillsstepped coolant drillcustom step coolant drillstep carbide drillcoolant through step drillmulti diameter carbide drill