Agricultural Machinery

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High-speed transport (50km/h+) makes gear noise a critical issue. The root cause is often “waviness” on the gear flank. Nobeve recommends upgrading to our K–Series (Class AAA) hobs. By using ultra-fine 0.2µm carbide and strictly controlling the Adjacent Pitch Error (fp), we reduce the micro-waviness on the tooth surface, significantly lowering the NVH (Noise, Vibration, Harshness) levels at the source.

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Absolutely. This is a common failure point. If the grinding wheel hits the tooth root fillet, it creates stress risers leading to fatigue failure. Nobeve uses Protuberance Design on our K-Series hobs. We calculate the exact undercut amount based on your grinding stock (e.g., 0.15mm) so the grinding wheel only touches the active flank, leaving the strengthened root fillet untouched.

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Vibration in PTO shafts is often caused by Inaccurate Tooth Geometry (profile error) leading to poor fitment. A standard “off-the-shelf” cutter might not match the specific ISO/SAE spline standard perfectly. Nobeve manufactures Custom Profile Hobs that are ground to the exact tolerance of your spline standard (e.g., DIN 5480), ensuring a tight, vibration-free fit.

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 Forged blanks often have a hard, uneven “skin” or scale. For this “Interrupted Cut” condition, standard carbide is too brittle.

• If you have a rigid CNC: Use our K-Series with Altensa Coating before heat treating, if after heat treating,we will recommend G-Series.
• If you have an older machine: We strongly recommend our N–Series (HSS-Co). Its superior toughness allows it to cut through the forging scale without chipping.

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Yes, dry cutting is the standard for modern Ag-gear production. Our K-Series is specifically engineered for this with Oerlikon Balzers Alcrona Pro coating. This coating has excellent thermal stability (up to 1100°C) and lubricity, directing the heat into the chips rather than the tool or workpiece, eliminating the need for messy and expensive coolant.

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We want you to save money, not waste it. Solid Carbide (K-Series) is extremely hard but brittle. Older manual machines often have spindle runout or vibration. This vibration will cause a carbide hob to shatter instantly. For repair shops with older equipment, our N–Series (High-Speed Steel) is the “forgiving” choice—it bends slightly under vibration instead of breaking, ensuring you get the job done.

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Yes. We can integrate Tip Relief (Chamfer) directly into the hob profile. This modification removes the sharp corner at the tip of the gear tooth during the hobbing process. This “Tip Relief” prevents edge chipping when the tractor gear engages under heavy load or shock, significantly extending the transmission’s life.