Export Shipment Update: IDLER DOUBLE HELICAL GEAR Finished for Steel Mill Customer (Full-Tooth Hardened)
Export Shipment Update: IDLER DOUBLE HELICAL GEAR Finished for Steel Mill Customer (Full-Tooth Hardened)
Date: 2026-01-20
Product: Gear Idler – Double Helical (Herringbone)
Summary
We have completed a new batch of Idler Double Helical Gears for an overseas steel mill customer. The gears feature full-tooth hardening (hardened tooth flanks) to enhance strength and wear resistance, supporting stable operation in heavy-duty, continuous-running industrial transmissions.
Why Steel Mills Choose Double Helical (Herringbone) Idler Gears
In steel plant gearboxes and transmission systems, operating conditions typically include high torque, shock loads, and long duty cycles. A double helical (herringbone) gear helps improve meshing stability and load handling, making it a preferred solution for demanding industrial applications.
Key Selling Point: Full-Tooth Hardening for Higher Strength & Wear Resistance
This finished gear shows a completed tooth profile with heat-treated tooth surfaces. The full-tooth hardened design is a major advantage for steel mill applications because it helps:
Improve tooth surface strength
Increase wear resistance under heavy load
Support longer service life and more stable operation
Product Photos (Finished Machined Parts)
Photo 1 – Double helical tooth profile (V-shaped / herringbone teeth):
Photo 2 – Another angle showing tooth alignment and overall gear form:
Photo 3 – Gear body view, showing machined bore and gear structure:
Specifications (Per Drawing)
Name: Gear Idler
Type: Double Helical (Herringbone)
Outer Diameter (OD): Ø344.72 mm
Pitch Circle Diameter (P.C.D): Ø324.72 mm
Material: SCM440
Heat Treatment: QT + HIT
Notes on Heat Treatment:
QT typically refers to Quenching & Tempering for strong core properties.
HIT is commonly used for additional hardening treatment to improve tooth durability (final effect: stronger, more wear-resistant tooth surfaces).
Application: Steel Mill Heavy-Duty Transmission
This idler double helical gear is suitable for steel-industry drive systems such as:
Continuous-running transmission lines
High-load idler positions used to adjust center distance / transmission direction
Quality Focus
During manufacturing and finishing, we focus on:
Tooth geometry consistency and stable meshing behavior
Heat-treated tooth surfaces for durability in abrasive/heavy-load environments
Export-ready delivery preparation based on customer requirements
Call to Action (Inquiry)
Looking for custom double helical (herringbone) gears for steel mill gearboxes?
Send us your drawing or key parameters (OD / PCD / module / tooth count / helix angle / hardness requirement), and we will provide a quick technical confirmation and quotation.
Email：sales@tinvogroup.com
