합금강 내륜 기어 - 스퍼/헬리컬, ISO9001 인증

Korea Ever-Power's alloy steel internal ring gears are precision-engineered ring gears delivering excellent performance in automotive and industrial applications. These rings have teeth fitted either on the periphery of a flex plate or flywheel of an internal combustion engine (external ring gear, for starter motor engagement) or on the inner bore of a planetary ring gear carrier (internal ring gear, for planetary gearbox applications). At Korea Ever-Power's state-of-the-art manufacturing unit, different types of alloy steel internal ring gears are designed and developed to cater to the requirements of vehicles, industrial machinery, and power transmission equipment across all sectors.

Korea Ever-Power has been producing alloy steel internal ring gears since its inception with a vision to reach the heights of success by offering international products. Over the years, the company has achieved a remarkable reputation in manufacturing, exporting, and supplying gear products for almost all industrial applications. ISO 9001 certified. ODM and OEM service. Quick delivery for breakdown jobs. Excellent after-sales service.

High Efficiency and Durability

Alloy steel internal ring gears achieve high transmission efficiency (typically 98–99.5% per stage for a well-maintained planetary stage) due to the internal gear's conforming tooth contact geometry — the concave internal tooth surface engaging the convex pinion tooth creates a larger contact patch than an external pair at the same module, reducing Hertzian contact stress and friction power loss. Durability is provided by the alloy steel's combination of high case hardness after heat treatment and tough core — resisting both surface pitting fatigue and tooth root bending fatigue across the gear's designed service life.

Precisely Formed and Heat-Treated

Korea Ever-Power's alloy steel internal ring gears are precisely formed on NC gear hobbing, NC gear shaping, and NC gear grinding machines that produce the tight tooth profile tolerances required for automotive and industrial applications. The heat treatment process (carburising, quenching and tempering, induction hardening, or nitriding — per the application specification) is controlled to achieve the specified case depth, surface hardness, and core hardness. Post-heat-treatment gear grinding corrects the distortion from heat treatment and achieves the final profile accuracy.

Machined on Faces to Eliminate Stress Concentrations

The face machining of Korea Ever-Power's alloy steel internal ring gears eliminates the surface imperfections (burrs, nicks, tool marks, and scale from heat treatment) that act as stress concentration points under bending fatigue. Any surface imperfection on the ring gear face — particularly in the bore bore contact region and at the tooth root — creates a local stress concentration that reduces the fatigue life below the design calculation's prediction. The face machining process ensures a clean, stress-concentration-free surface at all critical locations.

Suitable for Structural Applications

In addition to standard gear applications, alloy steel ring gears are also suitable for mounting on steel beams, rails, patented tracks, angles, and tubing — as structural ring gear elements in rack-and-pinion linear drive systems, slewing ring gear assemblies on steel frames, and segment ring gears welded or bolted to structural steel members. Korea Ever-Power's alloy steel ring gear's weldability (alloy grades are selected for weldability where structural mounting is specified) and machinability for post-assembly drilling and tapping make it suitable for these structural gear installation applications.

Spur and Helical Profiles

Korea Ever-Power produces alloy steel internal ring gears in both spur (straight tooth) and helical (angled tooth) profiles. Spur internal ring gears are the standard automotive planetary stage ring gear — simple to manufacture, no axial load, and the dominant profile for internal gears. Helical internal ring gears provide lower transmission noise (progressive engagement vs the instantaneous engagement of spur gears), higher load capacity per tooth face width, and are specified for quieter automotive transmissions and premium industrial planetary gearboxes.

Quick Delivery for Breakdown Jobs

Korea Ever-Power prioritises quick delivery for breakdown jobs — unplanned equipment failures where production or vehicle downtime accumulates rapidly while the replacement ring gear is awaited. The manufacturing facility's high equipment availability and the professional engineering team's ability to prioritise urgent production requests allows Korea Ever-Power to deliver alloy steel internal ring gears significantly faster than the standard lead time for time-critical breakdown situations. Contact Korea Ever-Power with the urgency level at enquiry time for specific breakdown delivery confirmation.

Automotive Powertrain

Alloy steel internal ring gears for automatic transmission planetary stages, EV motor planetary reducers, and electric power steering planetary drives. Teeth on flex plate or flywheel periphery for engine starting; teeth on inner bore for planetary transmission stages. Both configurations produced to the customer's drawing and pressure angle specification.

Industrial Machinery

Alloy steel internal ring gears in industrial planetary gearboxes, conveyor drive planetary stages, mixing machine drive reducers, and general factory automation drives. Spur or helical profile per the noise and load specification. Quick delivery for breakdown replacement of failed production-line ring gears.

Railway and Infrastructure

Alloy steel ring gears on steel rails, beams, and structural members for rack-and-pinion mountain railway drives, bridge traverser ring gear systems, and cable car or funicular drive ring gears. The combination of alloy steel ring gear mounted on a structural steel rail or angle section suits both railway and overhead crane infrastructure applications.

Construction and Mining

Alloy steel internal ring gears in excavator swing drive planetary stages, drill rig top drive planetary reducers, and mining hoist planetary gearboxes. Breakdown delivery service is particularly important for construction and mining equipment where equipment downtime at a remote work site has high daily cost.

Profile Ground Precision Gears

Profile ground alloy steel internal ring gears for highest-accuracy applications — servo motor planetary stages, robot joint planetary drives, and precision positioning planetary gearboxes. Korea Ever-Power's internal grinder and gear grinding machines produce profile ground internal ring gears where post-heat-treatment distortion is fully corrected to the specified DIN 4–6 accuracy class.

Global OEM and Aftermarket

Alloy steel internal ring gears exported to 20+ countries for OEM programme supply and aftermarket replacement. Korea Ever-Power's wide market presence across 20+ countries includes Australia, South Korea, Netherlands, Brazil, Canada, and Southeast Asian markets. ODM and OEM service with customisation, customer part number marking, and quality documentation to customer format.

What makes Korea Ever-Power's alloy steel internal ring gears cost-effective?

Cost-effectiveness comes from three sources: the single-facility production process (all operations from raw material to finished ring gear in-house, eliminating sub-contractor markups and inter-facility logistics), the advanced CNC equipment's high production rate and low scrap rate (precision machining the first time, no rework), and the scale of production capacity (high monthly volume amortises the machine overhead across many parts, reducing the fixed cost per piece). Korea Ever-Power provides competitive pricing without compromising the ISO 9001 quality process that makes the ring gear acceptable at international customer quality audits.

What is a customer-focused approach in practice for ring gear orders?

Customer-focused approach means: (1) understanding the application requirement before specifying the ring gear, not just quoting to the drawing dimensions; (2) alerting the customer to any potential issues in the design before production (interference conditions, material grade mismatches, surface treatment compatibility with the service environment); (3) providing quick delivery for breakdown jobs where the customer's equipment downtime cost is accumulating; and (4) excellent after-sales service when quality issues arise — rapid response, clear root cause analysis, and corrective action rather than dispute.

Can Korea Ever-Power supply the complete drive system, not just the ring gear?

Yes — Korea Ever-Power's full product range covers all the gear components needed for a complete drive system: ring gears (internal and external), spur gears, helical gears, profile ground gears, bevel gears, spiral bevel gears, sprockets, worm and worm wheels, racks and pinions, timing pulleys, spline shafts, motors, and gearboxes. Customers who consolidate the ring gear and its mating sun gear, planet gears, and output shaft to Korea Ever-Power benefit from matched-module, matched-material, single-supplier-quality-system consistency across all components of the planetary drive.

How does ISO 9001 certification benefit ring gear customers?

ISO 9001 certification means Korea Ever-Power's quality management system (QMS) has been independently audited and confirmed to meet the international standard for quality system management. Practically, this means: documented and controlled production processes (reducing variation between batches), systematic corrective action for non-conformances (problems are fixed and don't recur), and a documented supplier approval foundation that most international industrial and automotive customer quality systems accept. For customers whose own quality system requires certified suppliers, Korea Ever-Power's ISO 9001 certificate is the qualification evidence. Contact our team to request the certificate.

"We source alloy steel internal ring gears from Korea Ever-Power for our automotive automatic transmission supplier programme. The helical internal ring gear M1.2 DIN 5 was produced from our drawing with exact pressure angle confirmation — the helical ring gear's noise contribution at our acoustic test was below our 62 dB(A) limit. Profile ground post-heat-treatment, corrected to DIN 5 at our incoming gear measurement. ISO 9001 accepted at our OEM audit."

Kim Jae-hyeok  |  Transmission Design Engineer, Incheon Automotive Drivetrain Co.  ·  Q1 2026

"We had an excavator swing planetary ring gear failure at a remote construction site — 3 days downtime already. We contacted Korea Ever-Power on a Wednesday; they confirmed the alloy steel internal ring gear specification and quoted quick delivery. Production confirmed in 8 days (versus their standard 15-day lead time) — delivered by DHL express to our regional depot. Excavator back in service by day 12. The ring gear is still in service 14 months later."

Lee Dong-min  |  Construction Equipment Maintenance Manager, Gyeonggi Construction Equipment Rental Co.  ·  Q4 2025

"We consolidated four gear types (ring gear, spur sun gear, planet gear, output spline shaft) to Korea Ever-Power for our servo motor planetary gearbox programme. Single supplier for all four gear components meant one ISO 9001 qualification, one tooling development discussion, one material batch for matched module consistency. Profile ground alloy steel internal ring gear DIN 4 confirmed on our Klingelnberg gear measurement machine."

Park Hyeong-jun  |  Servo Gearbox Engineering Manager, Busan Precision Drive Systems Co.  ·  Q2 2026

"We import alloy steel internal ring gears for distribution across 20+ country markets from Korea Ever-Power. Wide market presence across our customer base is confirmed — ISO 9001 accepted in every market we serve. The customer-focused approach is evident in Korea Ever-Power's response to our specification changes during product development — each revision handled quickly without re-quoting from scratch. Cost-effective pricing has enabled us to win distribution contracts that competing, higher-priced suppliers could not."

Choi Byeong-jun  |  Global Gear Distribution Director, Daejeon Global Precision Parts Co.  ·  Q3 2025

"We use alloy steel internal ring gears from Korea Ever-Power for steel beam–mounted rack-and-pinion linear drive systems in our automated warehouse. The ring gear's face machining eliminates stress concentration at the mounting bolt holes where the ring gear attaches to the beam flange. Two years in service; no tooth fatigue or mounting bolt loosening issues. Korea Ever-Power alerted us to a potential stress concentration issue at our original bolt pattern design — proactive technical support we did not expect from a gear supplier."

Yoon Jae-hyeon  |  Automated Warehouse Drive Systems Engineer, Ulsan Logistics Automation Co.  ·  Q1 2025