Modular Drills — Full Specifications
Spade Drill System — Overview
Indexable spade drilling, Ø14.0–30.0mm, available in 3xD and 5xD depths.
Galtona's Modular Drills range is an indexable spade drill system (DSCD series) covering Ø14.0mm to Ø30.0mm in both 3xD and 5xD depths, with an interchangeable insert (Spade.GTPP450) clamped via a Torx Plus screw. The system is built around a single, precise insert seat — the same insert dimensions and clamping-screw sizes are shared across both depth ranges at each diameter.
Your benefits
- Easy handling
- Increased productivity thanks to the interchangeable insert
- Precise and stable insert seat, clamping via Torx Plus screw
Cost savings
- Sustainable and economical
- Reduces tool-change time by up to 20%
- High feed possibility up to 0.5 mm/rev in steel
3xD Range — Ø14.0–30.0mm
Tool and insert designation for the 3xD depth, representative sizes across the full diameter range.
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| Ø [mm] | Tool designation | Tool material no. | Insert designation | Insert material no. |
|---|---|---|---|---|
| 14 | DSCD.3D.1400.R.16.00 | GD14738935 | Spade.14,00.GTPP450 | GD14968329 |
| 16 | DSCD.3D.1600.R.20.00 | GD14738939 | Spade.16,00.GTPP450 | GD14968338 |
| 18 | DSCD.3D.1800.R.20.00 | GD14738943 | Spade.18,00.GTPP450 | GD14968346 |
| 20 | DSCD.3D.2000.R.25.00 | GD14738947 | Spade.20,00.GTPP450 | GD14968352 |
| 22 | DSCD.3D.2200.R.25.00 | GD14738951 | Spade.22,00.GTPP450 | GD14968356 |
| 25 | DSCD.3D.2500.R.32.00 | GD14738957 | Spade.25,00.GTPP450 | GD14968366 |
| 28 | DSCD.3D.2800.R.32.00 | GD14738963 | Spade.28,00.GTPP450 | GD14968376 |
| 29.5–30.0 | DSCD.3D.2950.R.32.00 | 14738966 | Spade.29,50/30,00.CTPP450 | 14968382 / 14968384 |
Full 3xD range available in 0.5mm steps from Ø14.0 to Ø30.0mm (32 sizes) — complete designation and material-number table available on request.
5xD Range — Ø14.0–30.0mm
Tool and insert designation for the 5xD depth, representative sizes across the full diameter range.
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| Ø [mm] | Tool designation | Tool material no. | Insert designation | Insert material no. |
|---|---|---|---|---|
| 14 | DSCD.5D.1400.R.16.00 | GD14738903 | Spade.14,00.GTPP450 | GD14968329 |
| 16 | DSCD.5D.1600.R.20.00 | GD14738907 | Spade.16,00.GTPP450 | GD14968338 |
| 18 | DSCD.5D.1800.R.20.00 | GD14738911 | Spade.18,00.GTPP450 | GD14968346 |
| 20 | DSCD.5D.2000.R.25.00 | GD14738915 | Spade.20,00.GTPP450 | GD14968352 |
| 22 | DSCD.5D.2200.R.25.00 | GD14738919 | Spade.22,00.GTPP450 | GD14968356 |
| 25 | DSCD.5D.2500.R.32.00 | GD14738925 | Spade.25,00.GTPP450 | GD14968366 |
| 28 | DSCD.5D.2800.R.32.00 | GD14738931 | Spade.28,00.GTPP450 | GD14968376 |
| 29.5–30.0 | DSCD.5D.2950.R.32.00 | GD14738934 | Spade.29,50/30,00.CTPP450 | 14968382 / 14968384 |
Full 5xD range available in 0.5mm steps from Ø14.0 to Ø30.0mm (32 sizes) — complete designation, overall-length (OAL), flute-length (LU), and material-number table available on request.
Spade Insert Geometry & Grades
135° point angle, GTPP450 grade, insert dimensions by diameter.
The spade insert has a fixed 135° point angle across the full diameter range. Insert dimensions (cutting diameter DC, insert height H2, thickness s, and overall height H1) scale with tool diameter.
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| DC [mm] | H2 [mm] | s [mm] | H1 [mm] |
|---|---|---|---|
| 14 | 12.8 | 5.1 | 7.73 |
| 16 | 14.4 | 5.9 | 9.06 |
| 18 | 16.3 | 6.6 | 10.19 |
| 20 | 18.2 | 7.3 | 11.33 |
| 22 | 20.2 | 8.0 | 12.56 |
| 25 | 22.7 | 8.7 | 13.91 |
| 28 | 25.3 | 9.5 | 15.36 |
| 30 | 26.2 | 9.5 | 15.49 |
Grade overview
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| Grade | ISO | Composition | Coating | Recommended application |
|---|---|---|---|---|
| GTPP425 | HC-P25 / HC-M25 | Co 9.0%, mixed carbides 4.0%, WC balance, fine/medium grain | PVD TiAlN/TiN | Particularly suitable for the machining of steels |
| GTPP440 | HC-M40 / HC-P40 | Co 9.0%, mixed carbides 0.7%, WC balance, submicron grain | PVD TiAlN | First choice for austenitic steels and heat-resistant alloys |
| GTPK415 | HC-K15 | Co 6.0%, mixed carbides 2.0%, WC balance, fine grain | — | Suitable for cast iron machining |
| GTPP450 | HC-P40 | Co 11.0%, others 0.8%, WC balance, submicron grain | PVD TiAlXYN | Steel and stainless steel — tough, wear-resistant substrate with heat-resistant PVD coating (default spade insert grade) |
Technical Data — Cutting Parameters, Applications & Assembly
Recommended cutting speed and feed rate, application guidance, and insert-change procedure.
Recommended cutting speed — GTPP450 (m/min)
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| Material group | Material | Strength Rm [N/mm²] | min | opt. | max |
|---|---|---|---|---|---|
| P 1.0 | Non-alloy steels | ≤500 | 80 | 100 | 120 |
| P 2.0 | Non-alloy / low alloy steels | 500–900 | 80 | 100 | 120 |
| P 3.0 | Low alloy steels, heat treated / nitride / tool steels | >900 | 70 | 90 | 110 |
| P 4.0 | High alloy steels | >900 | 40 | 50 | 60 |
| P 4.1 | HSS | — | 40 | 50 | 60 |
Special alloys (Inconel, Hastelloy, Nimonic), titanium, stainless steels, and cast iron groups are listed in the catalogue as "coming soon" for this grade at time of publication.
Recommended feed rate f (mm/rev) by diameter band, non-alloy steel
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| Ø14–16 | Ø16–20 | Ø20–25 | Ø25–30 |
|---|---|---|---|
| 0.22 | 0.25 | 0.28 | 0.32 |
| 0.25 | 0.28 | 0.32 | 0.35 |
Applications
| Application | Guidance |
|---|---|
| Stack drilling | Ensure either no gap or the maximum possible gap between stacked plates. Good workpiece clamping is required. |
| Drilling into solid material | Possible. |
| Drilling on inclined surfaces | For angled surfaces <3°, reduce feed by approx. 50%. For an angled drill entrance >3°, prior spot facing is required. |
Assembly of the indexable insert
- Loosen the clamping screw anti-clockwise using a Torx Plus screwdriver (screwdriver not included in the scope of supply).
- Remove the indexable insert from the insert seat.
- Clean the insert seat and screw thread with compressed air.
- Insert the new indexable insert in the insert seat.
- Insert the clamping screw from the correct side and tighten clockwise with the specified torque. Observe the change interval of the clamping screw.