Reducer

Focusing on the design, manufacturing processes, heat treatment techniques, and key quality control points for all types of standard and non-standard gears.

K..SZ..AD.. Series Gear Reducer thumbnail 1

K..SZ..AD.. Series Gear Reducer

The K..SZ..AD.. Series Gear Reducer (K..SZ37–187AD1–8) is a K Series right-angle gear reducer with an AD input shaft. Its 90° transmission layout and multiple AD input shaft types provide flexible connection options for industrial drive systems. The series is suitable for conveyors, material handling equipment, rotary equipment, lifting and transfer systems, and other industrial machinery.

Item	Value
Model	K..SZ37–187AD1–8
Ratio Range	5.36–197.37
Motor Power	0.12–200 kW
Output Torque	200–50,000 Nm
Transmission Type	K Series Right-Angle Gear Reducer
Input Type	AD Input Shaft, AD1–AD8

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Product Description

Key Technical Features & Advantages

K Series Right-Angle Gear Structure: The K..SZ..AD.. series uses a right-angle transmission layout, allowing the drive source and driven equipment to be arranged at 90°.
AD Input Shaft Design: The AD type provides an input shaft connection between the drive source and the gear unit.
Multiple Input Shaft Types: The K..SZ..AD.. range includes AD1–AD8 input shaft types, with different shaft dimensions for different installation requirements.
Multiple Frame Sizes: The dimensional drawing covers K..SZ37, K..SZ47, K..SZ57/67, K..SZ77, K..SZ87, K..SZ97, K..SZ107, K..SZ127, and K..SZ157/167/187.
Model-Specific Dimensions: Shaft diameter, G, k2, M thread, l1/l2, t/u, and h1 dimensions vary by selected model and input shaft type.
Mounting Dimensional Reference: The K..SZ37–187AD1–8 Mounting Dimensional Description provides dimensional data for model selection, shaft connection checks, and equipment layout.
Defined Drive-Side Interface: The input shaft dimensions shown in the drawing provide a clear reference for matching the reducer with the drive-side connection.

Product Design Configurations

K..SZ..AD.. Series: K Series right-angle gear reducer with AD input shaft
K..SZ37 – K..SZ187: Multiple frame sizes covering different dimensional requirements
Input Shaft Types: AD1, AD2, AD3, AD4, AD5, AD6, AD7, and AD8
Gear Arrangement: K Series right-angle transmission
Drive Layout: 90° transmission arrangement
Dimensional Reference: K..SZ37–187AD1–8 mounting dimensional description

Input & Output Configurations

Input Type: AD input shaft
Input Shaft Options:
- AD1
- AD2
- AD3
- AD4
- AD5
- AD6
- AD7
- AD8
Input Dimensions: Shaft diameter, G, k2, M thread, l1/l2, t/u, and h1 according to the selected model and AD type
Output Arrangement: Refer to the selected K..SZ model and corresponding technical drawing for the machine-side output dimensions.

Mounting Styles & Options

Transmission Layout: Right-angle installation arrangement
Input Connection: AD input shaft
Input Shaft Selection: AD1–AD8 according to the required shaft dimensions
Model Selection: K..SZ37–K..SZ187 according to equipment and dimensional requirements
Installation Reference: Check the corresponding mounting dimensions for shaft position, overall dimensions, and installation space before ordering.

Motor Options & Accessories

For the K..SZ..AD.. type, the available technical drawing mainly defines the input shaft and mounting dimensions rather than a fixed list of motor accessories. Motor selection and related accessories should therefore be confirmed according to the selected reducer model and equipment requirements.

Primary Industrial Applications

Conveyor Systems
Material Handling Equipment
Rotary Equipment
Mixing & Agitation Equipment
Lifting and Transfer Equipment
Feeding Machinery
General Industrial Machinery

Our Core Strengths

Standardized Production Process Flow

Raw Material Forging & Normalizing
Premium alloy steel (20CrMnTi / 40Cr) forgings undergo strict normalizing and ultrasonic flaw detection to eliminate internal stress, optimize grain structure, and ensure superior core impact resistance.

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Precision CNC Machining & Gear Hobbing
Multi-axis CNC lathes complete high-precision turning of reference datums and end faces. High-speed CNC gear hobbing and shaping machines precisely form the initial tooth profile with strict geometric allowances.
Controlled Carburizing & Heat Treatment
Processed in multi-purpose atmosphere-controlled furnace lines. Surface carburizing and quenching achieve a wear-resistant surface hardness of HRC 58–62, while preserving tough, shock-absorbing cores.

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High-Precision CNC Gear Grinding
Advanced CNC profile gear grinding machines eliminate heat-treatment micro-distortions. Tooth flanks are precisely modified with crowning to achieve DIN Class 5–6 accuracy, ensuring whisper-quiet running.
Housing Machining & Clean Modular Assembly
Gearbox housings are machined on CNC horizontal machining centers for micron-level bore concentricity. Assembled in a clean workshop with top-tier bearings (SKF/NSK/C&U) and dual-lip oil seals to guarantee zero oil leakage.

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100% Comprehensive Testing & Export Packaging
Every unit undergoes 100% full inspection: gear measurement center (CMM), dynamic running test (vibration, noise, temperature rise) and sealing test before multi-layer anti-rust film and solid plywood case packaging.

Core Advantage

Ultra-Silent Transmission

High-precision gear grinding delivers tooth surface roughness as low as Ra 0.4, with tight meshing, low vibration and noise for smoother equipment operation.

Extended Service Life

Premium materials matched with precise heat treatment ensure wear-resistant tooth surfaces and impact-resistant core, cutting maintenance and replacement costs.

All-Condition Adaptation

Custom solutions for high-speed heavy load, corrosion resistance and food-grade scenarios, eliminating trial-and-error costs in product selection.

Cost-Effective & Reliable Delivery

Scaled production supports tiered pricing for bulk orders with consistent quality; full-process control guarantees stable lead time and complete after-sales support.

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Logistics and After-Sales Service

Global Logistics & Export Packaging

VCI Anti-Rust & Solid Plywood Packaging

Internal VCI vacuum anti-rust packaging combined with seaworthy, non-fumigation plywood crates to guarantee zero corrosion during long ocean transit.

Flexible Multi-Modal Shipping

Supporting Sea Freight, Air Cargo, and Railway Express (FOB, CIF, DDP/DDU) with real-time tracking for punctual delivery.

Complete Export Documentation

Full clearance support including Certificate of Origin (CO/Form E), CE certificates, and factory dynamic test reports.

After-Sales Service & Technical Warranty

12-Month Full Quality Warranty

100% free replacement or repair for any manufacturing-related defects under standard operating conditions within 12 months.

24/7 Rapid Engineering Support

Professional technical team provides 2-hour response for model selection, installation guidance, and troubleshooting.

Lifetime Spare Parts Availability

Sufficient inventory of standardized modular parts (gears, shafts, seals, bearings) ensuring rapid worldwide dispatch.

Frequently Asked Questions (FAQ)

Can your gearboxes directly replace international brands like SEW, Flender, or Bonfiglioli?

Yes. Our modular gearboxes (R, F, K, S series and planetary units) are designed to standard international mounting dimensions. They can achieve 1:1 direct interchangeability in mounting hole positions, shaft diameters, input flanges, and gear ratios without modifying your existing machinery.

What technical parameters do I need to provide to select the right gearbox?

To help our engineering team calculate the ideal model, please provide: input motor power (kW/HP), input/output speed (RPM) or gear ratio, required output torque (Nm), mounting position (horizontal/vertical), and the specific application or working environment.

What is the typical lead time for standard and customized gearboxes?

For standard modular models (R/F/K/S series and cycloidal gearboxes), lead time is typically 7–15 days. For customized units with special ratios, shafts, or special flanges, lead time is usually 20–30 days. Emergency spare parts are dispatched within 48 hours.

How do you guarantee zero oil leakage and transmission durability?

All gearboxes utilize precision-machined CNC housings for micro-level bore concentricity, premium dual-lip skeleton oil seals, and top-tier bearings (SKF/NSK/C&U). Every unit undergoes a 100% dynamic running test (vibration, noise, temperature rise) and sealing test before export packing.

What is your MOQ, warranty policy, and do you supply test reports?

Our MOQ is 1 unit (sample order supported). All products come with a 12-month comprehensive warranty. Each shipment can be provided with full documentation, including dynamic test records, material certificates, CMM gear inspection reports, and CE/ISO compliance certificates.