TC12-250-XP32 Drill diameter 24.81-25.8mm
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12D Saber Tooth Indexable Drill | BEYOND
BEYOND 12D depth-ratio indexable drill with sword-tooth insert geometry. 12-32mm diameter range, internal coolant through the body.
The BEYOND 12D Saber Tooth (sword-tooth) indexable drill is designed for deep-hole drilling where the cutting depth reaches 12 times the drill diameter. The sword-shaped insert tooth geometry provides stronger cutting edges than standard inserts, with 1.5-3mm of grinding allowance for extended tool life. A single high-rigidity alloy-steel holder accepts interchangeable inserts covering 12-32mm diameters — meaning one toolholder can drill a wide range of hole sizes by swapping the insert, not the holder.
Product Specifications
| Specification | Value |
|---|---|
| SKU | TC12-250-XP32 |
| Diameter Range | 24.81 - 25.8 mm |
| Available Diameter Range (full series) | 12 - 32 mm |
| Depth Ratio | 12×D (12 times diameter) |
| Available Depth Ratios | 1.5D, 3D, 5D, 8D, 12D |
| Holder Material | High-rigidity alloy steel |
| Insert Type | BEYOND TC12-series sword-tooth (saber tooth) indexable carbide |
| Insert Grinding Allowance | 1.5 - 3.0 mm (for extended tool life) |
| Coolant Supply | Internal coolant through body (center-feed) |
| Insert Replacement | Quick change — no holder removal needed |
| Holder-to-Insert Compatibility | One holder accepts multiple insert diameters |
| Price (USD) | $460.89 per holder (insert sold separately) |
| Vendor | BEYOND house brand |
Depth Ratio Comparison — Which Drill Do You Need?
The "D" in 12D refers to the drill bit's diameter. A 12D drill can drill a hole 12 times deeper than its diameter before requiring a peck cycle. Different depth ratios suit different applications:
Saber Tooth (Sword Tooth) Insert Geometry
The saber tooth — also called sword tooth — is BEYOND's proprietary insert geometry for deep-hole drilling. Compared to standard 80° trigon inserts, the sword-shaped cutting edge has these advantages:
- Stronger cutting edge — the curved sword shape distributes cutting force across a wider edge, reducing chipping at high feed rates
- Better chip breaking — the curved geometry breaks chips into small segments, preventing the long stringy chips that cause pecking in deep holes
- Higher rigidity — the body of the sword tooth is thicker than a trigon insert, so it can handle the radial load of 12×D drilling without deflection
- Multiple grinding cycles — 1.5-3mm grinding allowance means the same insert can be re-sharpened 2-3 times before replacement, lowering per-hole cost
- One holder, many diameters — a single TC12-series holder accepts TC12 inserts in different diameter sizes, so you only stock one holder and swap inserts for different hole sizes
Compatible Insert Series
| Insert Code | Diameter Range | Best For |
|---|---|---|
| TC12-125 | 12.0 - 12.8 mm | Small precision holes |
| TC12-160 | 15.5 - 16.5 mm | Standard metric thread taps M16 base |
| TC12-200 | 19.5 - 20.8 mm | Medium duty drilling |
| TC12-250-XP32 | 24.81 - 25.8 mm | Hydraulic manifold ports |
| TC12-320 | 31.0 - 32.0 mm | Large diameter deep holes |
Application Guide
| Material | Cutting Speed (Vc) | Feed per Rev (fn) | Coolant Pressure |
|---|---|---|---|
| Mild Steel (P) | 80-120 m/min | 0.05-0.12 mm/rev | ≥ 7 bar (100 psi) |
| Stainless Steel (M) | 50-80 m/min | 0.04-0.08 mm/rev | ≥ 10 bar (150 psi) |
| Cast Iron (K) | 70-100 m/min | 0.06-0.15 mm/rev | ≥ 5 bar (75 psi) — dry or MQL OK |
| Aluminum (N) | 150-300 m/min | 0.08-0.20 mm/rev | ≥ 5 bar (75 psi) — flood or MQL |
| Hardened Steel HRC 50+ (H) | 30-50 m/min | 0.03-0.05 mm/rev | ≥ 15 bar (220 psi) — high-pressure required |
For 12D deep-hole drilling, use a peck cycle (G83 with Q-value 0.5-1×D per peck) to break chips and clear the flutes. Internal coolant pressure is critical — at least 7 bar for steel, 10+ bar for stainless, 15+ bar for hardened steel.
Why Choose BEYOND 12D Saber Tooth Drill
- 1 holder, multiple diameters — a single TC12-series holder covers 12-32mm hole sizes by swapping the insert. Compared to buying dedicated drills for each diameter, you save 60-70% on tool inventory.
- 12×D depth capability — drill holes 12 times deeper than the diameter in a single setup. No peck-cycle workaround needed for most applications.
- 1.5-3mm grinding allowance — the sword tooth can be re-sharpened 2-3 times before replacement, reducing per-hole tooling cost by 40-50% compared to single-use inserts.
- Internal coolant as standard — center-feed coolant supply is built into the holder, so you don't need a separate coolant-through-spindle setup (though high-pressure coolant is still recommended for hardened steel).
- Factory direct pricing — same geometry as premium brands at 30-50% off OEM retail. No distributor markup.
Frequently Asked Questions
1. Does the drill come with inserts?
No. The 12D saber tooth drill body (TC12-250-XP32) is sold separately from the inserts. The body is the holder, and the inserts are replaceable consumables that need to be ordered based on the specific diameter range you need to drill. This is standard for indexable drills — the holder lasts for years, only the inserts need replacement.
2. What does "12D" mean exactly?
12D means the drill can cut to a depth of 12 times its own diameter. For a 25mm drill, that's 300mm of depth. This depth-ratio naming is standard for indexable drills. The 12D drill is one of five depth options (1.5D, 3D, 5D, 8D, 12D) — choose the right depth ratio for your deepest hole plus 10-20% margin. For example, a 200mm deep hole with a 20mm diameter needs a 10D minimum drill; the 12D version gives you margin.
3. Why is it called "saber tooth" or "sword tooth"?
The insert's cutting edge has a curved sword/saber shape, as opposed to a straight trigon or square insert edge. This curved geometry makes the cutting edge stronger (more material behind the edge) and helps break chips into smaller pieces. The "saber tooth" / "sword tooth" names are interchangeable — both refer to the same BEYOND TC12-series insert geometry. The collection title uses "Saber Tooth" while the product body uses "Sword Tooth" for the same product.
4. Can the holder accept different insert diameters?
Yes. The TC12-250-XP32 holder accepts TC12-series inserts in different diameter sizes (12-32mm). The "250" in the SKU refers to the holder's connection/bore size, not the insert size — so this single holder can run inserts from 12mm up to 32mm diameter. You change inserts (not holders) to drill different hole sizes, which significantly reduces your tool inventory cost.
5. What spindle horsepower and coolant pressure do I need?
For steel at 25mm diameter and 12×D depth, you need at least 7.5 kW (10 HP) spindle power and 7 bar (100 psi) coolant pressure. For stainless or hardened steel, increase coolant pressure to 10-15 bar (150-220 psi) and consider high-pressure coolant through the spindle. The drill's internal coolant channels are designed for these pressures; lower pressure may cause chip evacuation problems and premature insert failure.
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Browse BEYOND's full drill and tooling catalog:
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- 5D Indexable Drills (WC Inserts) — 5×D carbide drill
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- Carbide Drill Bits — solid carbide twist drills
- Tool Holder Accessories & Replacement Parts — drill wrenches, screws, clamps
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- Tool Holder Buying Guide — face mill chuck and shank selection
Need a different diameter or depth ratio?
TC12-160 / TC12-200 / TC12-320 inserts and 1.5D / 3D / 5D / 8D holders available on request.
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