1 Model Information & Technical Parameters

Model：KDN.JHA10CL0

Dimensions

Matching shaft diameter d：10 mm

Performance Data

Minimum required shaft hardness ≥HRC60

Shaft raceway roughness Ra ≤0.2 μm

CL0: Precision radial clearance group

No suffix letter: Standard general base specification

Technical Attributes

Supply form: Needle rollers + cage assembly (without inner ring & outer ring)

Structure type: KDN.JHA medium arched window general-purpose caged needle roller assembly

Axial characteristic: Pure radial load only, axial force and continuous impact load prohibited

Cage: Precision pressed steel JHA arched window cage with standard finishing

Needle roller: Standard graded rollers, no extra crowning treatment

Seal: Open design, no built-in seal

Pre-grease: None

Logistics & Industry Codes

Net weight：0.007 kg

Indicative carbon footprint：0.03 kg CO₂e

eClass code：23-05-09-01

UNSPSC code：31171506

Suffix Explanation

KDN.JHA: JHA series medium arched window caged needle roller assembly without separate inner and outer rings; shaft and housing bore serve as raceway. Arched window delivers higher rigidity than KAA straight window cage.

10: Suitable shaft diameter 10 mm.

CL0: Precision radial clearance grade with strictly controlled clearance range for regular precision transmission.

No suffix letter: Standard base model without special enhancements for low friction, low noise or fretting corrosion resistance.

Important reminder: This model has no solid inner and outer rings. Mating shaft and housing bore must be hardened and precision ground. Insufficient hardness and surface finish will cause early pitting, raceway scoring or seizure. Only pure radial load permitted; axial load forbidden. Open structure requires external lubrication and housing dust protection; dry running prohibited. Do not strike cage during assembly; pressing force shall act on cage end face. For applications requiring low breakaway torque and fretting resistance, upgrade to KDN.JHA10CL0K.

2 Structure & Operating Characteristics

Japan NMT KDN.JHA10CL0 compact arched window caged needle roller assembly. The JHA arched window cage boasts higher rigidity than KAA straight window structure and tolerates slightly fluctuating radial loads. CL0 precision clearance balances assembly tolerance and rotary positioning accuracy. Needle rollers adopt standard dimensional sorting to ensure even load distribution for regular continuous rotation and intermittent swing. Pressed arched cage separates rollers evenly to avoid direct contact friction. Suitable for medium load general precision transmission without special low-torque or low-noise requirements.

Selection reference:

KDN.JHA10CL0 (standard base model, general precision transmission, no special performance upgrade)

KDN.JHA10CL0K (CL0 precision clearance + K low-friction upgrade, frequent start-stop, low-speed micro-motion, low startup torque)

KDN.KAA series: Light-duty straight window cage for light load and limited radial space

NK/RNA series: needle roller bearings with integrated outer ring.

3 Core Performance Advantages

1. JHA arched stamped cage with enhanced rigidity to resist deformation under fluctuating loads.

2. CL0 precision radial clearance ensures stable rotary accuracy for most medium-small precision mechanisms.

3. Standardized production with cost advantages, ideal for mass production automation equipment.

4. Evenly arranged rollers achieve uniform load distribution and reliable continuous operation.

5. Ringless integrated assembly supports lightweight and compact equipment design.

6. Open design compatible with long-term grease lubrication and circulating oil lubrication.

4 Typical Application Fields

4.1 Medium-Small Automation Standard Transmission Mechanisms

Rotary hinges of automation modules, tooling rotary shafts, supports for ordinary servo actuators

4.2 Small Gear & Indexing Components

Supports for miniature gearboxes, intermittent indexing mechanisms, light-load continuous rotary parts

4.3 General Rotary Shafts for Inspection Equipment

Swing pivots for automated inspection tooling, rotary supports for standard instruments

4.4 Small Industrial Actuating Elements

Swing shafts of small valves, ordinary pan-tilt spindles, light-duty mechanical joints

5 Assembly Specifications & Usage Guidelines

5.1 Assembly Environment & Operation Standards

Keep assembly area clean; dust and impurities accelerate wear. Apply pressing force only on cage end face, avoid hitting cage sidewall. Manually rotate after assembly to confirm smooth movement without obvious jamming. Verify hardness and roughness of shaft and housing raceway before assembly.

5.2 Selection Guidance

Medium-small precision transmission without micro-motion or low-torque demand → KDN.JHA10CL0

Frequent start-stop, low-speed micro-motion requiring reduced startup resistance → KDN.JHA10CL0K

Limited radial installation space and light load → KDN.KAA series

Integrated outer ring required for direct housing mounting → NK / RNA needle roller bearings

5.3 Lubrication Maintenance Instruction

No pre-filled lubricant at delivery. Fill matched grease during assembly; circulating oil lubrication recommended for long continuous operation. Schedule periodic re-lubrication, dry rotation is forbidden.

5.4 Environmental Application Notes

No permanent anti-rust coating. Apply anti-rust oil and seal tightly for long-term storage. Install end covers and oil seals in dusty and humid environments. For long-term low-speed small swing (micro-motion) conditions, prefer K-suffix low-friction version to reduce fretting wear.

6 Fault Identification

Common failure modes: Needle roller surface pitting, shaft raceway scoring, cage window deformation, increased operating noise and accelerated wear. Replace complete assembly once cage distortion or roller breakage occurs; repair and reuse are not allowed.