CoroDrill® Dura 462
Versatile solid carbide drills for short-hole drilling in multi-material applications
The hole
The three most basic parameters for the hole are:
- Hole diameter
- Hole depth
- Hole quality
The hole type and required precision affect tool choice. Drilling can be affected by irregular or angled entry/ exit surfaces and by cross holes.
The component
When the hole is analyzed, have a look at the workpiece material, component shape and quantity
- Does the material have good chip breaking qualities? Long or short chipping material?
- Machinability?
- Material hardness?
- Alloy elements?
The machine
The machine influences:
- The type of operation
- Which type of tool holders and/ or collets to use
Always consider:
- Machine stability
- Spindle speed
- Coolant volume and pressure
- Workpiece clamping
- Choice of horizontal or vertical spindle
Tool holding
Productivity is not only influenced by grade and geometry, but also by the ability to clamp the tool securely and precisely. For best stability and hole quality always use Coromant Capto® or CoroChuck® 930 with the shortest possible drill and overhang.
Tool run-out
Minimum tool run-out is essential for successful drilling. The run-out should not exceed 0.02 mm (0.0008 inch) in order to achieve:
- Close hole tolerance and straightness
- Good surface finish
- Long and consistent tool life
Coolant
Coolant supply influences:
- Chip evacuation
- Hole quality
- Tool life
Internal coolant is necessary for hole depths larger than 3×DC and for avoiding chip jamming.
External coolant can be used for shallow hole depths and good chip formation.
Chip control
Chip formation and evacuation is a critical issue. Chip jamming is dependent on:
- Workpiece material
- Choice of drill geometry
- Coolant pressure/ volume
- Cutting data
It affects hole quality, drill life/ reliability, drill breakages.
Cutting data
Cutting speed is the main factor affecting tool life.
High speed rates:
- High temperatures
- Increased tool wear
- Poor hole quality
- Bad hole tolerance
Lower speed rates:
- Built-up edges,
- Bad chip evacuation
- Longer time in cut
Initial considerations
Cutting speed, along with material hardness, are the main factors affecting tool life and power consumption.
How to achieve good hole quality
Achieving good hole quality may require some extra attention. Here you can find some useful tips to get you started.
Reconditioning
Recondition your round tools for major cost savings with our reconditioning service.
Recommendations
- It is recommended to use hydraulic precision chucks
- It is recommended to use internal coolant, minimum recommended pressure 10 bar (145 psi)
Product range
| Drill type | Length / diameter ratio | Diameter range, mm (inch) | Coolant | Grade |
| Type 1 | 3×DC | 3.00–20.00 (0.118–0.787) | Internal/external | X2BM |
| Type 1 | 5×DC | 3.00–20.00 (0.118–0.787) | Internal/external | X2BM |
| Type 1 | 8×DC | 3.00–20.00 (0.118–0.787) | Internal | X2BM |
| Type 2 | 3×DC | 3.30–18.00 (0.130–0. 709) | Internal | X2BM |
| Type 1 Micro drills | Up to 6×DC | 0.030–3.00 (0.001–0.118) | External | X0BU (uncoated) |
| Type 1 Micro drills | Up to 6×DC | 0.20–3.00 (0.008–0.118) | External | X0BM (coated) |
Tailor Made® options
Examples on customizable parameters, these will vary with the drill type selected.
| Drill type | 1, 2, 4, 5, 6 |
| Cutting diameter | 3–25 mm (0.001 increments) |
| Drill length | Up to 10×D |
| Point angle | 90–180 degrees |
| Coolant | Internal or external |
| Corner modification | No modification, chamfer, radius |
| Margin | Single or double |
| Shank | HA, MQLHA, reinforced, straight shank |
| Coating | X2BM |
Drill types
Drill type 1
Drill type 2
Drill type 4
Drill type 5
Drill type 6
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Sandvik Coromant UK
+44 (0)121 368 0305