K-Series High Speed Dry Cutting Hobs
Whenever gear manufacturing obstacles such as thermal shock, excessive coolant costs, unpredictable tool life, or strict cycle time limits emerge, rely on Nobeve’s K-Series for the thermal stability and high-speed performance you demand. Our premium Konrad Friedrichs carbide substrate, coupled with advanced Oerlikon Balzers PVD coatings, guarantees that every hob maintains DIN AAA precision, without exception.
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INTRODUCTION
Why Leading Manufacturers Are Switching to Dry Hobbing?
In the competitive landscape of gear manufacturing, traditional wet hobbing is becoming a bottleneck. The costs of coolant disposal, the environmental impact, and the limitations on cutting speed are eating into your margins. You need a tool that can withstand extreme thermal shock while delivering DIN AAA precision. Nobeve understands this challenge. That’s why we developed the K-Series, specifically designed to eliminate coolant dependency while boosting your production output by 40%.
Thermo-Stable Substrate
ourced from German Konrad Friedrichs, this premium carbide is engineered to withstand the extreme thermal shock of dry cutting, preventing the thermal cracking common in standard grades.
Oxidation Barrier
Features Oerlikon Balzers BALINIT® ALCRONA PRO to maintain extreme hot hardness, preventing crater wear even when cutting tip temperatures exceed 800°C without coolant.
K-SERIES SPOTLIGHT
High-Flow Geometry
We utilize polished flutes and optimized rake angles to ensure rapid chip evacuation, preventing chip re-cutting—a primary cause of surface failure in dry machining.
Speed Optimized
Calibrated for modern high-speed platforms (Vc 150-300 m/min), enabling significant cycle time reductions compared to wet hobbing while eliminating coolant management costs.
PRODUCT SPECIFICATION
Nobeve K-Series is designed for high-performance gear hobbing machines. Whether you are producing automotive gears or precision reducers, these parameters ensure reliability.
| Specifications-Overall Dimensions | Surface Treatment | ||
|---|---|---|---|
| External Diameter | Internal Diamete | Length | |
| Unit(mm) | Unit(mm) | Unit(mm) | |
| ≤φ25 | φ8 | ≤L30 | Cleaning-Sandblasting Edge Passivation PVD Coating |
| ≤φ25 | φ10、φ13 | ≤L50 | |
| ≤φ40 | φ13 | ≤L60 | |
| ≤φ40 | φ16 | ≤L80 | |
| ≤φ70 | φ22、φ27 | ≤L100 | |
| ≤φ95 | φ27、φ32、φ40 | ≤L100 | |
- Recommended Cutting Speed: 150–300 m/min
- Recommended Feed Rate: 0.5–0.8 mm/rev
- Machining Environment: Suitable for both dry (air-cooled) and wet (oil-cooled) cutting.
- Workpiece Hardness:≤ HRC 45 (EVO Coating)；HRC 35–55 (AT Coating)
- Accuracy Class: DIN AA, DIN AAA
- Customization: Custom sizes available for batch orders.
Not the right fit for your current application? Explore other gear cutting tools from Nobeve.
WHY CHOOES OUR K-SERIES HOBS
Eliminate 100% of coolant disposal costs. The extended tool life of our K-Series reduces downtime for tool changes, lowering your Cost Per Part (CPP) significantly
Running at 300m/min means you produce more gears per shift. Our designs are optimized for modern High-Speed Hobbing Machines (e.g., Liebherr, Gleason).
Every hob undergoes strict inspection on our Klingelnberg measuring centers before shipment. You get a detailed inspection report with every tool.
Testimonials
Our Customers
Feedback
“We pushed the K-Series to 280m/min dry, and it handled the thermal load without issue. Previously, heat buildup slowed us down, but now we hit daily quotas easily. The stability at high speeds is exactly what our production line needed. “
"Zero profile errors on the first test run. We usually waste hours tweaking offsets for small modules, but these hobs hit DIN AAA specs immediately. Seeing such consistent geometry right out of the box saved my team serious setup time."
"The Balzers coating performance is legitimate. We are seeing a massive jump in parts per regrind, meaning fewer tool changes per shift. Cutting our consumable costs while keeping the machines running longer has directly improved our plant's operational efficiency."
FREQUENTLY ASKED QUESTIONS
AWe strictly use imported German Konrad Friedrichs (KF) solid carbide rods for all K-Series hobs (OD ≤ 40mm). Unlike domestic carbide which can vary between batches, KF substrate ensures consistent grain structure, high density, and uniform Transverse Rupture Strength (TRS).
A
Yes, it is engineered for High-Speed Dry Hobbing. We utilize Oerlikon Balzers BALINIT® ALCRONA PRO (or ALTENSA). These AlCrN-based coatings offer superior hot hardness compared to standard TiAlN, allowing cutting speeds (Vc) of 150-300 m/min without coolant.
APeeling is a surface preparation failure, not a coating failure. Before coating, Nobeve hobs undergo a proprietary 7-Stage Ultrasonic Cleaning & Micro-Blasting process to remove cobalt-depleted layers. This ensures a chemical bond where the coating wears gradually with the substrate, rather than flaking off.
A
It is possible, but High-Speed CNC machines are recommended.
Optimum: Vc 150-300 m/min (CNC).
Risk: Running carbide at low speeds (<60 m/min) on unstable older machines causes vibration and micro-chipping. For older machines, our N-Series is a safer choice.
ANo. The standard K-Series is optimized for materials ≤ HRC 45. For pre-hardened steels (HRC 55-62), you must specify our G-Series (Hard Cutting Series), which uses a modified geometry and Balzers ALTENSA coating to withstand abrasive hard turning.
AIn automotive gear tests (Module 1.5-2.0), the K-Series achieves 90-95% of the tool life of top-tier brands (like LMT or Star SU) but at a 30-40% lower cost. We also provide regrinding guidance to restore tools to their optimal condition.
AWe target the root causes of noise: surface roughness and pitch error. Nobeve hobs are ground on Igawa-Tsu CNC machines using fine-grit diamond wheels to achieve Ra ≤ 0.1µm. We maintain Class AAA tolerance on Adjacent Pitch Error (fp) to minimize gear flank waviness.
APrecision fit is key. We manufacture the bore to H3 tolerance and guarantee Hub Face Run-out relative to the bore is within 0.002mm. With a high-precision arbor, we guarantee a Total Indicated Run-out (TIR) on the machine of less than 0.005mm.
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