1 Model Information & Technical Parameters

Model：KDN.JHA10XL0

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

No suffix: Standard base specification, without low-noise optimization or roller crowning low-friction treatment

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 standard cage

Needle roller: Standard precision grading for general working conditions

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.

No suffix: Standard edition without A noise control or K roller crowning low-friction process, balanced cost for normal continuous rotation applications.

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. Select KDN.JHA10XL0K for frequent start-stop and low-speed swing; choose KDN.JHA10XL0A for indoor low-noise requirements.

2 Structure & Operating Characteristics

Japan NMT KDN.JHA10XL0 compact arched window caged needle roller assembly. JHA arched window cage features excellent rigidity and withstands mild fluctuating radial loads. XL0 loose clearance reserves sufficient thermal expansion allowance to avoid jamming caused by clearance shrinkage under alternating temperature and continuous heating. As the base version of XL0 clearance, it adopts standard roller grading and standard cage pocket machining, focusing on universality and cost performance. Suitable for general automation mechanisms mainly running continuous rotation without low-speed micro-motion or strict noise restrictions.

Selection reference:

KDN.JHA10XL0 (XL0 loose clearance standard, general continuous rotation without special requirements)

KDN.JHA10XL0A (XL0 loose clearance + A low-noise upgrade for indoor noise-sensitive equipment)

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

KDN.JHA10CL0 / CL0A / CL0K: CL0 precision clearance prioritizing 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 sufficient rigidity, resistant to deformation under mild load fluctuation.

2. XL0 loose radial clearance compensates thermal expansion and assembly tolerances, lowering seizure risk in wide temperature range.

3. Standard universal manufacturing process with outstanding cost performance, suitable for mass supporting of general automation equipment.

4. Ringless integrated assembly simplifies mechanical structure and facilitates lightweight & compact equipment design.

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

4 Typical Application Fields

4.1 General Continuous Rotation Automation Components for Wide Temperature Range

Tooling rotary shafts on temperature-controlled production lines, light conveying mechanisms in ventilated environment, ordinary outdoor actuator joints

4.2 Transmission Pivots without Low-Speed Reciprocating Motion or Strict Noise Limits

Continuous transport spindles, hinge mechanisms for heat treatment auxiliary tooling, light-duty standard pan-tilt continuous rotation units

4.3 Module Mechanisms with Large Assembly Tolerances Requiring Gap Compensation

5 Assembly Specifications & Usage Guidelines

5.1 Assembly Environment & Operation Standards

Keep assembly area clean; contaminants accelerate raceway wear. Apply pressing force only on cage end face, avoid hitting cage sidewall. Manually rotate after assembly to confirm no persistent jamming. Verify hardness and roughness of shaft and housing raceway before assembly.

5.2 Selection Guidance

Wide temperature range, continuous rotation, no frequent micro-motion, no special noise demand → KDN.JHA10XL0

Noise-sensitive indoor equipment → KDN.JHA10XL0A

Frequent start-stop and low-speed reciprocating swing → KDN.JHA10XL0K

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 matched grease according to ambient temperature during assembly; circulating oil lubrication recommended for long continuous operation. Carry out periodic re-lubrication maintenance; dry rotation 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 under dusty and humid conditions. XL0 large clearance is not suitable for precision indexing and high-precision positioning mechanisms.

6 Fault Identification

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