1 Model Information & Technical Parameters

Model：KDN.KAA10XL0Q

 

Dimensions

Matching shaft diameter d：10 mm

 

Performance Data

Minimum required shaft hardness ≥HRC60

Shaft raceway roughness Ra ≤0.2 μm

XL0: Precision radial clearance group

 

Technical Attributes

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

Structure type: KDN.KAA miniature standard window caged needle roller assembly

Cage: Solid bronze cage (suffix Q) 

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

Coating: None

Seal: Open design, no built-in seal

Pre-grease: None

 

Logistics & Industry Codes

Net weight：0.006 kg

Indicative carbon footprint：0.03 kg CO₂e

eClass code：23-05-09-01

UNSPSC code：31171506

 

Suffix Explanation

KDN.KAA: KAA series miniature standard window caged needle roller assembly without separate inner and outer rings; shaft and housing bore serve as raceway.

 

10: Suitable shaft diameter 10 mm.

 

XL0: Precision radial clearance grade, higher precision than standard AR series, suitable for medium-small precision transmission mechanisms.

 

Q: Solid bronze cage designation, indicating the cage is manufactured from solid bronze material, offering superior strength, temperature resistance and impact resistance compared to pressed steel cages.

 

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 lead to early pitting, raceway scoring or seizure. Only pure radial load is allowed; axial load is forbidden. Open construction requires external lubrication and housing dust protection; dry running is prohibited. Do not strike cage directly during assembly, pressing force should act on cage end face.

 

2 Structure & Operating Characteristics

Japan NMT KDN.KAA10XL0Q miniature compact caged needle roller assembly adopts KAA lightweight standard window cage for limited small-diameter installation space. XL0 precision clearance balances assembly tolerance and rotary accuracy. Classified needle rollers ensure uniform load distribution and smooth rotation.

 

Key Differentiator – Solid Bronze Cage: The suffix Q indicates this model is equipped with a solid bronze cage. Compared to standard pressed steel cages, the solid bronze cage offers:

 

Higher strength: Solid construction provides greater load capacity for moderate load conditions.

 

Superior temperature resistance: Bronze material excels in high-temperature operating environments.

 

Enhanced impact resistance: Solid structure withstands frequent shock loads with reduced risk of cage deformation.

 

Lower wear: Excellent bronze-to-roller friction pairing ensures smoother operation.

 

Selection reference:

 

KDN.KAA10AR0 (AR0 standard clearance, pressed steel cage, general miniature mechanisms)

 

KDN.KAA10XL0 (XL0 precision clearance, pressed steel cage, medium-small precision transmission)

 

KDN.KAA10XL0Q (XL0 precision clearance, solid bronze cage, high-temperature/high-speed/impact conditions)

 

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

 

3 Core Performance Advantages

1. KAA miniature lightweight cage design, suitable for narrow radial installation space of miniature equipment.

 

2. XL0 precision clearance grade delivers excellent rotary accuracy to meet low-vibration demand of medium-small precision mechanisms.

 

3. Solid bronze cage (Q suffix) provides superior strength, temperature resistance and impact resistance for demanding conditions.

 

4. High-precision sorted rollers realize balanced contact stress and stable low-speed rotation.

 

5. Ringless integrated assembly structure supports lightweight integration of transmission units.

 

6. Open construction supports long-term grease lubrication and circulating oil lubrication.

 

7. Compact dimension suitable for mass assembly of miniature automation equipment.

 

4 Typical Application Fields

4.1 Miniature Automation Equipment

Hinge pivots of small electric modules, oscillating joints of miniature manipulators, rotary supports for precision fixtures

 

4.2 Small Precision Transmission Components

Supports for miniature gearboxes, small indexing mechanisms, light-load reciprocating oscillating parts

 

4.3 Testing & Instrument Equipment

Rotary supports for small test instruments, fine-tuning rotary mechanisms for optical equipment

 

4.4 High-Temperature, High-Speed or Impact Conditions (Q-Type Advantage)

High-speed transmission components with frequent start-stop cycles, automation equipment with instantaneous shock loads, precision mechanisms operating in elevated temperature environments

 

4.5 Small Household Appliances & Smart Equipment Transmission Parts

Light-load miniature rotary mechanisms, support points for miniature actuators

 

5 Assembly Specifications & Usage Guidelines

5.1 Assembly Environment & Operation Standards

Keep assembly area clean to prevent dust entering roller gaps. Apply pressing force to cage end face, avoid hitting cage sidewall (solid bronze cage offers higher strength but still requires proper handling). Manually rotate after assembly to confirm smooth rotation without jamming or periodic abnormal noise. Verify hardness and roughness of shaft and housing raceway before assembly.

 

5.2 Selection Guidance

Ordinary miniature mechanisms, loose assembly tolerance → KDN.KAA10AR0

Medium-small precision equipment requiring stable low vibration → KDN.KAA10XL0

High-temperature, high-speed, frequent impact, higher cage strength required → KDN.KAA10XL0Q

Outer ring needed for direct installation in housing → NK / RNA needle roller bearings

 

5.3 Lubrication Maintenance Instruction

No pre-filled lubricant on delivery; evenly apply suitable grease during assembly. Circulating oil lubrication is recommended for long-term continuous operation. Solid bronze cage has identical lubrication requirements to steel cages. Set regular oil replenishment schedule; dry running is strictly forbidden.

 

5.4 Environmental Application Notes

No anti-rust coating. Apply anti-rust oil and seal tightly for long-term storage. Equip end covers and oil seals under dusty and humid conditions. Add buffer structure if frequent impact loads exist.

 

6 Fault Identification

Common failure modes: Needle roller surface pitting, shaft raceway scoring, cage window deformation (solid bronze cage offers better deformation resistance than pressed steel cages, but severe overload may still cause deformation), seizure caused by poor lubrication. Replace whole assembly when cage distortion or roller damage occurs; repair and reuse are not allowed.