BEYOND WC25-5D-SD20.5-WC03 U-Drill | 20.5mm Indexable Drill (5D Depth)
BEYOND WC25-5D-SD21-WC04 U-Drill | 21mm Indexable Insert Drill (5D Depth)
BEYOND WC25-5D-SD21.5-WC04 U-Drill | 21.5mm Indexable Insert Drill
BEYOND WC25-5D-SD22-WC04 U-Drill | 22mm Indexable Insert Drill (5D Depth)
BEYOND WC25-5D-SD22.5-WC04 U-Drill | 22.5mm Indexable Insert Drill (5D Depth)
BEYOND WC25-5D-SD23-WC04 U-Drill | 23mm Indexable Drill for WC04 Inserts
BEYOND WC25-5D-SD23.5-WC04 U-Drill | 23.5mm Indexable Insert Drill (5D Depth)
BEYOND WC25-5D-SD24-WC04 U-Drill | 24mm Indexable Insert Drill (5D Depth)
BEYOND WC25-5D-SD24.5-WC04 U-Drill | 24.5mm Indexable Insert Drill (5D Depth)
BEYOND WC25-5D-SD25-WC05 U-Drill | 25mm Indexable Insert Drill (5D Depth)
BEYOND WC32-5D-SD25.5-WC05 U-Drill | 25.5mm Indexable Insert Drill (5D Depth)
BEYOND WC32-5D-SD26-WC05 U-Drill | 26mm Indexable Insert Drill (5D Depth)
BEYOND WC32-5D-SD26.5-WC05 U-Drill | 26.5mm Indexable Insert Drill (5D Depth)
BEYOND WC32-5D-SD27-WC05 U-Drill | 27mm Indexable Insert Drill (5D Depth)
BEYOND WC32-5D-SD28-WC05 U-Drill | 28mm Indexable Insert Drill (5D Depth)
BEYOND WC32-5D-SD28.5-WC05 U-Drill | 28.5mm Indexable Insert Drill (5D Depth)
BEYOND WC32-5D-SD29-WC05 U-Drill | 29mm Indexable Insert Drill (5D Depth)
BEYOND WC32-5D-SD29.5-WC05 U-Drill | 29.5mm Indexable Insert Drill (5D Depth)
BEYOND WC32-5D-SD30-WC05 U-Drill | 30mm Indexable Insert Drill (5D Depth)
BEYOND WC32-5D-SD30.5-WC05 U-Drill | 30.5mm Indexable Insert Drill (5D Depth)
BEYOND WC32-5D-SD31-WC06 U-Drill | 31mm Indexable Insert Drill (5D Depth)
BEYOND WC32-5D-SD31.5-WC06 U-Drill | 31.5mm Indexable Insert Drill (5D Depth)
BEYOND WC32-5D-SD32-WC06 U-Drill | 32mm Indexable Insert Drill (5D Depth)
BEYOND WC32-5D-SD32.5-WC06 U-Drill | 32.5mm Indexable Insert Drill (5D Depth)
Quick Links — Jump to Drill Family
SP 5D sibling, WC 2D/3D/4D, parent hub, holder guide & inserts:
BEYOND Indexable Drills With WC Inserts 5D | WC03 to WC08
BEYOND indexable U-drill bodies for 5D very-deep hole drilling on steel, alloy, and cast iron. WC-series 80° trigon negative rake inserts, cylindrical C25-C40 shank, 20-60mm cutting diameter, very-high-pressure internal coolant + mandatory peck-cycle.
The BEYOND indexable drills with WC inserts 5D collection is a very-deep subset of the WC-series indexable U-drill family, optimized for production drilling on steel, alloy steel, and cast iron where the hole depth reaches 5× the drill diameter. WC inserts are 80° trigon negative rake with strong cutting edges and stable chip flow — preferred over SP (positive rake) for steel very-deep drilling because the negative rake geometry handles higher cutting forces and produces more stable chip evacuation at depth. The 5D depth ratio demands the highest coolant pressure, very rigid setups, and mandatory peck-cycle for chip evacuation.
WC inserts are interchangeable with ISO 9766 standard equivalents from Korloy, Mitsubishi, and other major brands. For shallower 2D/3D/4D drilling on steel, see the WC 2D, WC 3D, and WC 4D siblings. For stainless steel / aluminum very-deep drilling, see the SP 5D sibling. For extra-deep 6D-12D work, see the 12D Saber Tooth Drill. For the complete U-drill catalog (WC + SP series, 2D-5D depth), see the parent drill hub. For broader tool holder selection, see the Tool Holder Guide.
3 Shank Diameter Reference
Three cylindrical C-shank sizes (C25 / C32 / C40) cover the 5D production range from medium to large industrial drilling. (This 5D WC family starts at C25; for the smallest C20 5D use case, use the WC 3D collection instead.)
| Shank Code | Shank Ø | Drilling Ø Range | WC Inserts Used | Spindle Compatibility |
|---|---|---|---|---|
| C25 | 25 mm | 20.5-26 mm | WC03, WC04, WC05 | BT40 / CAT40 / HSK-A63 |
| C32 | 32 mm | 26-38.5 mm | WC05, WC06 | BT40 / CAT40 / HSK-A63 / HSK-A100 |
| C40 | 40 mm | 39-60 mm | WC06, WC08 | BT50 / CAT50 / HSK-A100 (heavy) |
5 WC Insert Class Reference
WC-series inserts come in 5 IC (inscribed circle) sizes for the full 20-60mm cutting diameter range. Pick by diameter and workpiece material:
| Insert Code | IC | Cutting Ø | Shank | Workpiece | Common Grade |
|---|---|---|---|---|---|
| WC03 | 5.56 mm | 20-21 mm | C25 | Steel, alloy steel (small) | WCGT 0505 / WCMT 0505 |
| WC04 | 6.35 mm | 21-26 mm | C25 | Steel, alloy steel (small-medium) | WCGT 06T3 / WCMT 06T3 |
| WC05 | 7.94 mm | 25-30 mm | C25, C32 | Steel, alloy steel (medium) | WCGT 0804 / WCMT 0804 |
| WC06 | 9.525 mm | 31-40 mm | C32, C40 | Steel, alloy, cast iron (medium-large) | WCGT 09T3 / WCMT 09T3 |
| WC08 | 12.7 mm | 42-60 mm | C40 | Steel, alloy, cast iron (large) | WCGT 1204 / WCMT 1204 |
For 8-brand grade cross-reference (BEYOND, Korloy, Mitsubishi, Kyocera, Sandvik, Sumitomo, Tungaloy, Walter), see the grade cross-reference hub. For material-based grade selection, see the insert-by-material pillar.
Cutting Diameter Coverage (20-60mm)
The 5D WC-series drill bodies cover the 20-60mm range in 0.5mm / 1mm increments. (Starts at 20mm — for diameters below 20mm, use the WC 3D or WC 4D collections.)
| Cutting Ø | Shank | Insert | Typical Application |
|---|---|---|---|
| 20.5-26 mm | C25 | WC03 / WC04 / WC05 | Small-medium very-deep drilling, structural steel |
| 26-38.5 mm | C32 | WC05 / WC06 | Medium-large very-deep drilling, automotive, mold |
| 39-60 mm | C40 | WC06 / WC08 | Large industrial very-deep drilling, heavy steel, aerospace |
5D Internal Coolant + Peck-Cycle
At 5D depth ratio, internal coolant is mandatory and very-high-pressure. The drill body has flutes 5× diameter deep — chips have a very long path to evacuate, and any chip packing causes drill breakage. Additionally, peck-cycle is mandatory for all materials at 5D. Coolant pressure requirements at 5D depth:
- C25 (small shank) — 20-25 bar (290-360 PSI) for chip evacuation in 20-26mm Ø
- C32 (medium shank) — 25-30 bar (360-435 PSI) for stable chip flow in 26-38.5mm Ø
- C40 (heavy shank) — 30-40 bar (435-580 PSI) for high-MRR chip evacuation in 39-60mm Ø
- Peck-cycle interval — retract every 0.3-0.5× the drill diameter (for 25mm drill, retract every 8-12mm). Without peck-cycle, chips pack in the deep flutes and cause drill breakage.
- Cast iron — internal coolant is optional (cast iron produces dry chips); flood coolant is fine. Peck-cycle can usually be skipped.
For extra-deep 6D-12D work, use the 12D Saber Tooth Drill with sword-tooth insert geometry. For spindle selection and coolant system sizing, see the Speeds & Feeds hub.
Internal Resources
Jump to the right drilling + milling + boring + insert reference for your shop:
BEYOND Drilling Family
BEYOND Milling + Boring
BEYOND Tool Holder Family
Carbide Insert Pillars
Tool Holding + Accessories
Brand Inserts + Face Mill Hub
FAQ — WC-Series 5D Indexable Drill
What is the difference between WC and SP insert series?
WC is an 80° trigon (negative rake) insert family with strong, stable cutting edges — preferred for steel, alloy steel, and cast iron at high material removal rate. The negative rake geometry handles higher cutting forces and produces more stable chip evacuation, which matters on tough materials and deep ratios. SP is a 55° positive trigon (positive rake) insert family with sharper cutting edges and lower cutting force — preferred for stainless steel, aluminum, low-carbon steel, and thin plate work. For 5D very-deep drilling on steel, use WC. For stainless / aluminum, use SP. Both are ISO 1832 / ISO 9766 standard.
Why choose 5D depth ratio over 2D/3D/4D/6D+?
5D depth ratio is the deepest practical ratio for standard SP/WC indexable U-drill bodies. It covers aerospace structural work, long-reach mold base, and other very-deep drilling where 4D can't reach. Beyond 5D, use the 12D Saber Tooth Drill with sword-tooth insert geometry designed for extra-deep rigidity. 5D requires the highest coolant pressure (20-40 bar) and mandatory peck-cycle. For most production drilling, 3D or 4D is sufficient — 5D is reserved for cases where the deeper reach is essential.
Do all WC 5D drill bodies have internal coolant?
Yes. All BEYOND WC 5D indexable U-drill bodies in this collection (C25 / C32 / C40 shanks) have through-body internal coolant channels. At 5D depth, internal coolant is mandatory and very-high-pressure for stable chip evacuation. Coolant pressure requirements: 20-25 bar for C25, 25-30 bar for C32, 30-40 bar for C40. Additionally, peck-cycle is mandatory (retract every 0.3-0.5× the drill diameter) to break chips before they pack in the deep flutes.
Can I use Korloy or Mitsubishi WCGT / WCMT inserts in BEYOND WC 5D drill bodies?
Yes. All BEYOND WC 5D drill bodies follow ISO 1832 / ISO 9766 standard for WCGT (80° trigon ground) and WCMT (80° trigon molded) inserts. Cross-brand equivalents from Korloy, Mitsubishi, Sumitomo, and Sandvik will fit the same pocket. The only check needed is IC size (5.56 / 6.35 / 7.94 / 9.525 / 12.7 mm) and matching insert thickness. For grade selection, see the 8-brand grade cross-reference.
How do I match shank size to drill body diameter?
General rule: shank diameter should be at least 70-80% of the cutting diameter for rigidity without over-stressing the spindle. For 20-26mm drill, use C25 shank (10 SKUs). For 26-38.5mm drill, use C32 shank (26 SKUs). For 39-60mm drill, use C40 shank (13 SKUs). Bigger shank = more rigid setup but heavier spindle load. The full shank × insert cross-reference is in the table above.
When is peck-cycle mandatory for WC 5D drilling?
Peck-cycle (retract drill periodically to break chips) is mandatory for all materials at 5D — without it, chips pack in the deep flutes and cause drill breakage. Standard peck-cycle interval is 0.3-0.5× the drill diameter — for a 25mm drill, retract every 8-12mm. For stainless steel and other stringy-chip materials, use the shorter interval (0.3×). For steel / cast iron with shorter chip, the longer interval (0.5×) works. The Speeds & Feeds hub has detailed peck-cycle guidance.
Need Help Sizing the Right WC 5D Drill?
Send us your workpiece material, hole depth, and required tolerance — we'll match the right C-shank + WC insert size + grade + coolant pressure + peck-cycle.
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