Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115: A Deep Practical Guide for Trades and Fabricators

If you work with metal, you already know that not all drill bits are created equal. The Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is designed precisely for those jobs where accuracy, durability, and clean holes really matter. Instead of being just another generic twist drill, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 combines fully ground M2 HSS, a Titanium Nitride (TiN) coating, and a 135° split point geometry to deliver consistent performance in demanding environments.

In this in‑depth guide, we’ll unpack what makes the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 different from cheaper drills, how its geometry affects real‑world drilling, and where it fits among Alpha’s other series. Whether you’re working in fabrication, maintenance, or installation, understanding this specific Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 will help you select the right tool for the job and get the most value out of every hole you drill.

What Is the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115?

At its core, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is a professional‑grade, metric jobber‑length twist drill designed for general and heavy‑duty drilling in steel and other common engineering materials. “Jobber” refers to its standard length format: with an 11.5 mm diameter, 142 mm overall length, and 94 mm flute length, this Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is long enough for typical structural and fabrication work while remaining rigid enough for clean, accurate holes.

The “Gold Series” name points to two key things: a Titanium Nitride (TiN) coating and a fully ground M2 high‑speed steel (HSS) core. Unlike basic hardware‑store drills that may be roll‑forged and uncoated, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is ground from solid M2 HSS and then coated with TiN to increase wear resistance and reduce friction. For tradespeople and fabricators, that means the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is built to handle repeated drilling in tougher steels with a longer service life.

Key Specifications of the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115

Before you decide whether the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 belongs in your kit, it helps to see the core specifications clearly laid out. These specs define how the drill behaves, how deep you can practically drill, and what kind of accuracy you can expect from the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115.

  • Nominal diameter: 11.5 mm
  • Overall length (OAL): 142 mm
  • Flute length: 94 mm
  • Material: M2 high‑speed steel (HSS)
  • Coating/finish: Titanium Nitride (TiN) – the signature “gold” finish
  • Point angle: 135° split point
  • Helix angle: ~30° (Type N, general‑purpose geometry)
  • Standard: DIN 338 jobber drill, straight shank
  • Point tolerance / diameter tolerance: typically H8/h8
  • Maximum recommended cut depth: around 5× diameter (≈ 57.5 mm for 11.5 mm)

In practice, these dimensions mean the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 can comfortably handle medium‑depth holes while still leaving enough flute length for chip evacuation. With a 94 mm flute, you are not limited to shallow work; but because the maximum recommended cut depth is around 5×D, this Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 performs best when you combine that depth with proper peck drilling and lubrication.

M2 HSS and TiN Coating: Why This Alpha Jobber Drill Bit Lasts Longer

One of the biggest selling points of the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is the combination of M2 high‑speed steel and a Titanium Nitride coating. Many cheaper drills also use HSS, but they’re often made from lower‑grade material or are not fully ground. The Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115, by contrast, is made from quality M2 HSS that balances toughness, red hardness (hot hardness), and wear resistance.

M2 HSS is a well‑known tool steel grade rich in molybdenum, tungsten, chromium, and vanadium. This composition allows the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 to maintain a sharp edge at elevated temperatures, which is exactly what you face when drilling steels at proper production speeds. That red hardness means the cutting lips of the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 stay effective longer instead of softening and rounding over prematurely.

On top of that M2 HSS core, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 receives a Titanium Nitride coating. TiN is a thin, hard, golden‑coloured layer typically a few microns thick, offering microhardness levels around 2300 HV and a low friction coefficient against steel. What does that mean for you? When you use the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115, friction is reduced at the cutting lips and along the lands, so chips slide away more easily, heat is somewhat lowered, and flank wear slows down.

Fully Ground Construction vs Roll‑Forged Drills

Alpha highlights that the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is “fully ground” M2 HSS, and that’s more than a marketing phrase. In a fully ground drill like the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115, the flutes, margins, and point geometry are ground from solid material, rather than simply being roll‑forged into shape.

Why does this matter in the workshop? First, a fully ground Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 typically has better concentricity and tighter diameter tolerances than a roll‑forged drill. That means more accurate hole sizes and less runout‑induced wear. Second, the surface finish in the flutes of a fully ground Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is generally smoother, which improves chip evacuation and reduces friction.

When you’re drilling in harder steels or using a hand drill on site, the refined geometry of the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 helps reduce the circular “wobble” that can enlarge holes, overload the cutting edges, and shorten tool life. In other words, a fully ground Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is an investment in both accuracy and durability.

135° Split Point Geometry on the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115

Point geometry plays a huge role in how a drill starts and cuts, and the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 uses a 135° split point designed to cut faster and reduce wandering. At the centre of any drill is a chisel edge that doesn’t really cut; it pushes material aside. A properly ground split point, like the one on the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115, thins this web and turns more of that central zone into a true cutting edge.

The 135° included angle of the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 spreads the cutting load over a wider surface and lowers thrust forces compared to a standard 118° point. Combined with the split point, this geometry helps the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 bite into the workpiece without "walking" across the surface.

This matters especially when you’re drilling on round tube, angled steel, or other awkward surfaces where a basic drill would skate around unless you used a centre punch or pilot hole. With the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115, you still benefit from good practice like centre punching, but the split point gives you a more controlled start and better positional accuracy.

Clearing Up Confusion: Gold Series vs Black Series Specifications

If you’ve browsed multiple online listings, you may have noticed conflicting information about the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115. Some descriptions mention a black oxide finish and a 118° split point, and others mention TiN and 135°. This confusion comes from different Alpha series being blended together in retailer feeds.

For clarity: the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is the TiN‑coated Gold Series drill with a 135° split point. The Black Series 11.5 mm drill is a different product, typically featuring a black oxide finish and a 118° split point. When you select the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115, you’re specifically choosing the M2 HSS, fully ground, TiN‑coated, 135° split point configuration.

Why does this distinction matter? Because the way a black oxide finish behaves is different from TiN, and a 118° point behaves differently from a 135° point. The Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is optimised for durability and reduced walking in tougher steels. If your job truly requires black oxide and a 118° geometry, you should instead select the matching Black Series drill, not the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115.

Material Suitability of the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115

With its M2 HSS core and TiN coating, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is engineered as a general‑purpose professional drill bit, particularly effective in steels. In practice, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 can be used on:

  • Stainless steels (with correct speeds, feeds, and coolant)
  • Tool steels and medium‑carbon steels
  • Cast iron and malleable iron
  • Free‑cutting steels
  • Aluminium, brass, and some plastics (with appropriate parameter control)
  • Wood and similar softer materials for occasional work

Where some confusion arises is in non‑ferrous materials. Certain listings warn that the drill is “not recommended for soft materials or non‑ferrous metals.” In reality, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 can drill aluminium and similar alloys, but TiN is not always the perfect coating for aluminium due to its chemical affinity and tendency toward built‑up edge in some conditions.

If you frequently drill aluminium all day, you might choose alternative coatings like TiB₂, ZrN, or CrN that are designed to resist chip sticking. For occasional work, however, good lubrication, moderate speeds, and careful feed application will still let the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 perform adequately in non‑ferrous materials.

Recommended Speeds and Feeds for the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115

Speeds and feeds are where many drill bits live or die. Even the best Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 will struggle if you spin it too fast with no coolant, or too slowly with almost no feed so that it rubs instead of cuts. Alpha’s cutting data offers useful starting points for this specific diameter.

For an 11.5 mm drill, approximate spindle speed targets for the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 might look like this:

  • Stainless steel (~12 m/min): around 330 RPM
  • Tool steel (~18 m/min): around 500 RPM
  • Cast iron (~24 m/min): around 660 RPM
  • Malleable iron (~27 m/min): around 750 RPM
  • Medium carbon steel (~30 m/min): around 830 RPM
  • Free‑cutting steel (~43 m/min): around 1190 RPM
  • Aluminium / brass / plastic (~61 m/min): around 1690 RPM
  • Wood (~91 m/min): around 2520 RPM

These values are not hard rules, but they give you a solid baseline when using the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 in different materials. As a rule of thumb, larger drills like the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 require higher feed per revolution (in the range of 0.25–0.35 mm/rev) to stay in the cutting zone instead of rubbing.

If you push the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 too fast and too lightly, the cutting lips glaze over, heat spikes, and the TiN‑coated edge wears prematurely. If you stay within the recommended range and use coolant, this Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 will reward you with longer life and cleaner holes.

Coolant, Lubrication, and Deep Hole Drilling Practices

Alpha strongly recommends appropriate lubrication when using the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115, especially in stainless or high‑tensile steels. Cutting fluid serves several roles: it reduces friction, flushes chips, and carries heat away from the cutting zone. A well‑lubricated Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 stays cooler and sharper longer.

Deep hole drilling is another scenario where best practice really matters. Alpha considers “deep hole” drilling to begin at around four times the drill diameter. For an 11.5 mm tool like the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115, that’s roughly 46 mm depth and beyond. Since the recommended cut depth is up to about 5×D, peck drilling becomes essential.

In practical terms, that means drilling a short distance, then retracting the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 to clear chips, reapplying lubricant, and then continuing. This avoids chip packing, which increases friction, stalls chip flow, and can snap or burn out even a high‑quality Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115.

Workholding and Setup: Getting the Most from the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115

Even the best geometry and coating on the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 cannot compensate for poor workholding or a worn‑out drill chuck. Alpha’s drilling practice guide emphasises clamping the workpiece securely, using a sound chuck or collet, and avoiding worn sockets.

To install the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 correctly:

  1. Clean the shank and chuck jaws to remove oil or debris.
  2. Fully insert the shank of the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 into the chuck, then pull it back slightly so it’s not bottoming out.
  3. Tighten the chuck evenly (using the key if it’s a keyed chuck) and check for visible runout.
  4. Clamp the work firmly, especially if you’re using the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 on a hand drill where the workpiece might move.
  5. Select your speed and feed based on the material, and apply cutting fluid before and during drilling.

In stainless and high‑tensile steels, avoid “dwelling” at the bottom of the hole with the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115. Dwelling hardens the material surface, making the next pass harder on the tool and leading to rapid wear or chipping.

How the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 Compares to Other Alpha Series

When you’re choosing a drill, it’s useful to see where the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 sits among its closest siblings. Alpha offers multiple series around this diameter, each tuned for slightly different priorities. Understanding these options helps you decide when the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is the best choice and when another series might be smarter.

Here’s how the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 typically compares:

  • Gold Series (9LM115) – M2 HSS, TiN coating, 135° split point, fully ground. A general‑purpose professional option for steel and mixed‑material work, with a strong focus on longevity and reduced wandering.
  • Black Series (C9LM115B‑type) – M2 HSS with black oxide finish and a 118° split point. Emphasises lubricant retention and chip flow with a more traditional point angle. Ideal if you specifically want black oxide characteristics instead of TiN, but different from the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115.
  • Silver Series (9LM115S) – Bright finish and a 118° self‑centering split point, often positioned for mild steels and non‑ferrous materials like aluminium, brass, and plastics. If you prioritise non‑ferrous work, this may be an alternative to the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115.
  • Cobalt Series (9LM115CO) – HSS cobalt alloy, typically with a 135° split point. Built for even more demanding duty cycles in stainless and high‑tensile applications. If you constantly drill hard stainless steels, you might step up from the standard Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 to a cobalt variant.
  • Long Series (9ELM115) – Same diameter but with extended overall and flute length for deeper holes, with similar Gold‑Series engineering. The long series complements, rather than replaces, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 when extra reach is required.

The key takeaway is that the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is a versatile mid‑priced option that bridges durability, geometry, and ease of use. It’s not the cheapest drill Alpha sells, nor the most specialised. Instead, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is a dependable everyday workhorse for trades and maintenance teams.

Real‑World Performance of the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115

Specifications are one thing; how the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 behaves in the hands of real users is another. Feedback from tradespeople using the Gold Series at this diameter is consistently positive. Users report that the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 stays sharp longer than cheaper alternatives and holds up well when drilling stainless steel and tougher structural steels.

One common theme is reduced wandering on curved or angled surfaces. This matches what you’d expect from the 135° split point on the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115. When you’re drilling on round tube or awkward frames, the split point geometry helps the bit “bite” more confidently where a standard point might skid.

Users also notice less heat build‑up compared with basic HSS bits. Again, that’s consistent with what the TiN coating and fully ground geometry of the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 are designed to do: reduce friction, keep chips moving, and maintain a sharper edge for longer.

Of course, real‑world performance still depends on fundamentals: clamping the job properly, using correct speeds and feeds, and applying coolant. When those basics are in place, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 has proven to be a reliable choice across a wide range of workshop and job‑site tasks.

Cost, Value, and When the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 Makes Sense

When assessing cost, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 usually sits in the mid‑range for professional M2 HSS TiN‑coated drills. It’s often priced higher than budget, uncoated bits, but lower than some premium cobalt or carbide solutions. From a value perspective, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 pays for itself by lasting longer and producing cleaner holes when used correctly.

If you’re a fabricator, fitter, or maintenance technician who regularly drills structural steel, stainless components, or machine frames, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is a strong candidate for your standard 11.5 mm choice. Rather than burning through multiple cheap bits, a single Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 can often complete more holes with less downtime and better surface finish.

On the other hand, if you rarely drill 11.5 mm holes or you only work in softer materials, you might not tap into the full potential of the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115. In that case, a lower‑tier drill could be sufficient. The real value of this Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 appears when you use it regularly in harder materials where geometry, coating, and material quality translate into noticeable gains.

Best‑Practice Tips for Longer Life with the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115

To unlock the full lifespan of the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115, a few simple habits go a long way:

  1. Use the right speed and feed. Stay within the recommended RPM range for each material when using the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115, and don’t be afraid to feed assertively. Under‑feeding makes the drill rub instead of cut.
  2. Always use coolant or cutting fluid in metals. The TiN coating on the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is designed to work with lubrication, not replace it. A few drops can dramatically reduce heat and wear.
  3. Peck drill in deeper holes. Beyond about 4×D depth, use peck cycles to clear chips, re‑lubricate, and cool the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115.
  4. Check your chuck and workholding. A slipping drill or moving job overheats both the workpiece and the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115. Secure clamping and a good chuck are non‑negotiable.
  5. Avoid dwelling in hard steels. Don’t hold the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 grinding in the bottom of the hole. Drill cleanly, then retract. Dwelling encourages work hardening and dramatically shortens tool life.

These basic practices keep heat, friction, and chip packing under control, so the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 can deliver on its design promise: more holes per tool and more predictable performance from one job to the next.

When to Choose a Different Tool Instead of the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115

No single drill is right for every job. Even though the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is versatile, there are scenarios where another tool might be more appropriate.

You may want to consider alternatives to the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 when:

  • You routinely drill deep holes far beyond 5×D and need specialised deep‑hole or long‑series drills.
  • You work almost exclusively in hardened stainless or very high‑tensile alloys where cobalt or carbide drills outperform standard HSS.
  • Your workload is dominated by aluminium or sticky non‑ferrous alloys, where coatings optimised for low aluminium affinity may outperform TiN on the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115.
  • You need extreme precision hole tolerances that are better served by reamers after drilling, or by CNC‑specific tooling.

In these cases, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 can still play a role in general fabrication tasks, but it may not be the “one tool for everything.” Knowing these limits helps you deploy the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 where it excels rather than asking it to be something it isn’t.

Related Drill & Cutting Collections from Industrial Electrical Warehouse

If you’re interested in the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115, there’s a good chance you’ll benefit from exploring these closely related product collections at Industrial Electrical Warehouse:

Drill Bit Collection →

Browse the wider Drill Bit collection to find other diameters, lengths, and styles that complement the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115. From small pilot drills to larger jobber and reduced‑shank options, this collection helps you build out a complete, size‑covered drilling set for workshop and site work.

Alpha Brand Collection →

If you like the performance and consistency of the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115, the Alpha brand collection gathers complementary tools from the same manufacturer. Here you’ll find other jobber drills, reduced shank variants, taps, and cutting tools built on the same quality standards and geometry philosophy.

Cutting & Drilling Collection →

For a broader tooling upgrade around the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115, the Cutting & Drilling collection offers cutting discs, grinding wheels, hole saws, and additional accessories. It’s a practical place to round out your kit with everything you need to cut, drill, and finish metal more efficiently.

Conclusion: Why the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 Deserves a Place in Your Kit

When you step back and look at the full picture, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 brings together several important advantages: a fully ground M2 HSS body, a tough TiN coating, a 135° split point that resists wandering, and jobber‑length geometry built around DIN 338 standards. For tradespeople, fabricators, and maintenance teams, this combination makes the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 a dependable, everyday tool for drilling steels and other common materials.

Used with proper speeds, feeds, coolant, and workholding, the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 delivers clean, accurate holes and a longer working life than bargain‑bin alternatives. And because it sits at a sensible price point relative to its performance, it offers solid value over time rather than a false economy.

If you’re considering upgrading the way you approach 11.5 mm holes, take a moment to review the product page for the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 from your preferred supplier. Looking over the specifications, related series, and available accessories will help you decide how this drill fits into your broader tooling strategy—and whether the Alpha Jobber Drill Bit 11.5mm x 142mm Gold Series 9LM115 is the right next addition to your workshop or job‑site kit.

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