1 Model Information & Technical Parameters

Model：KDN.JHA10XL0A

Dimensions

Matching shaft diameter d：10 mm

Performance Data

Minimum required shaft hardness ≥HRC60

Shaft raceway roughness Ra ≤0.2 μm

XL0: Loose radial clearance group

Suffix A: Low-noise smooth running specification; ultra-precise roller grading, tightly controlled cage pocket clearance to reduce rolling impact noise

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 Grade A noise-control dimensional tolerance

Needle roller: High-precision graded selection with strictly controlled dimension deviation to reduce vibration and abnormal noise

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.

XL0: Loose radial clearance grade with larger clearance range than CL0, for thermal expansion compensation, assembly tolerance absorption and alternating high-low temperature environments.

A: Low-noise optimized specification, focusing on suppressing roller impact noise at medium & low speed; suitable for indoor noise-sensitive applications, without special enhancement for low-friction micro-motion.

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. XL0 enlarged clearance slightly reduces rotary positioning accuracy, not applicable for high-precision indexing. Open construction relies on external lubrication and housing dust protection; dry running prohibited. Do not strike cage during assembly; pressing force shall act on cage end face. If frequent low-speed reciprocating swing exists, select K-suffix version.

2 Structure & Operating Characteristics

Japan NMT KDN.JHA10XL0A compact arched window caged needle roller assembly. JHA arched window cage provides excellent rigidity and resists deformation under fluctuating loads. XL0 loose clearance reserves sufficient thermal expansion allowance to avoid jamming caused by clearance shrinkage under alternating temperature and continuous heating. Equipped with Grade A low-noise configuration: strictly graded rollers and precisely machined cage pockets reduce clearance impact and suppress vibration and noise at medium-low speed. Suitable for automation mechanisms with large ambient temperature variation, mainly continuous rotation, noise control requirements and limited low-speed reciprocating motion.

Selection reference:

KDN.JHA10XL0A (XL0 loose clearance + A low-noise upgrade, wide temperature, continuous rotation, noise control)

KDN.JHA10XL0K (XL0 loose clearance + K low-friction upgrade, frequent start-stop, low-speed swing)

KDN.JHA10XL0 (XL0 loose clearance standard model, no noise or friction enhancement)

KDN.JHA10CL0A / CL0K: CL0 precision clearance for high rotary positioning accuracy

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

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

3 Core Performance Advantages

1. JHA arched stamped cage with high rigidity, resistant to deformation under mild fluctuating radial loads.

2. XL0 loose radial clearance compensates thermal expansion and assembly tolerances, preventing seizure under wide temperature range.

3. Grade A low-noise manufacturing standard, precise roller sorting and controlled cage pocket size reduce impact noise during operation.

4. Smooth rolling motion and lower vibration, ideal for indoor equipment and noise-sensitive production lines.

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

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

4 Typical Application Fields

4.1 Noise-Sensitive Indoor Automation Equipment

Indoor automated transport modules, rotary mechanisms for inspection equipment, light-duty continuous operating spindles

4.2 Continuous Rotary Components with Alternating High and Low Temperature

Tooling pivots on temperature-controlled production lines, light rotary joints in ventilated environment, non-frequent swing mechanisms

4.3 Continuous Transmission Parts Allowing Moderate Rotary Clearance without Ultra-High Positioning Demand

Continuous rotation shafts for light pan-tilt units, material transport swing arms, general industrial mechanical hinge pivots

5 Assembly Specifications & Usage Guidelines

5.1 Assembly Environment & Operation Standards

Maintain dust-free clean assembly area; contaminants increase vibration and noise. Apply pressing force only on cage end face, avoid hitting cage sidewall. Manually rotate after assembly to confirm smooth motion without periodic abnormal noise. Verify hardness and roughness of shaft and housing raceway before assembly.

5.2 Selection Guidance

Large temperature variation, continuous rotation, noise control, few low-speed reciprocating motions → KDN.JHA10XL0A

Frequent start-stop, low-speed swing, priority to reduce breakaway torque → KDN.JHA10XL0K

High-temperature continuous rotation without noise or low-torque requirements → KDN.JHA10XL0

High-precision positioning required → CL0 clearance series

Extremely 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 upon delivery. Select suitable grease during assembly; circulating oil lubrication recommended for long continuous operation. Implement periodic re-lubrication; dry rotation forbidden. Low-noise special grease is recommended for optimal acoustic performance.

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 under dusty and humid conditions. XL0 large clearance is not suitable for precision indexing and high-precision positioning mechanisms. The noise reduction performance can only be fully exerted under adequate lubrication.

6 Fault Identification

Common failure modes: Needle roller surface pitting, shaft raceway scoring, cage window deformation, steadily rising operating noise and aggravated periodic vibration. Replace complete assembly once cage distortion or roller damage occurs; repair and reuse are not allowed.