1 Model Information & Technical Parameters

Model：KDN.KAA17CL0

 

Basic Dimensions (Inch / Metric)

Parameter Inch Metric

Bore diameter (d) 1.750 in 44.450 mm

Outside diameter (D) 2.125 in 53.975 mm

Width (B) 0.1875 in 4.763 mm

Radial cross section (H) 0.1875 in 4.763 mm

Inner ring shoulder diameter (d₁) — ≈48.006 mm

Outer ring shoulder diameter (D₁) — ≈50.419 mm

Ball diameter — 2.381 mm

Fillet radius (r) 0.015 in 0.381 mm

Contact angle 0° (radial contact)

Performance Data

Parameter Value Unit Source

Dynamic load rating (radial, AKMI) 1.08 kN

Dynamic load rating (radial, SKF) 1.54 kN

Static load rating (radial) 2.05 kN

Static load rating (radial, lbf) 460 lbf

Limiting speed (grease) 8,260 r/min

Limiting speed (oil) 10,320 r/min

Operating temperature range -65 ~ +250 °F

Operating temperature range -30 ~ +110 °C

Note: Load rating variations between manufacturers (AKMI vs SKF) result from different testing standards and calculation methods. Radial dynamic load rating ranges 1.08–1.54 kN.

 

Technical Attributes

Supply form: Open thin-section radial contact ball bearing (with inner and outer rings)

Structure type: KDN.KAA constant-section thin-section radial contact ball bearing (Type C)

Sealing: Without seal (open)

Cage: GFR nylon (fiberglass reinforced nylon)

Pre-lubrication: None

Material: AISI 52100 bearing steel

Load direction: Primarily radial, with some axial load capacity in both directions

Assembly type: Conrad-type (no filling slot)

Number of rows: Single row

Tolerance class: ABEC 1F (KAYDON Class 1)

Radial clearance: CL0 precision clearance class (C0 standard clearance)

 

Logistics & Industry Codes

Net weight: 0.0227 kg (0.05 lbs)

Indicative carbon footprint: 0.09 kg CO₂e

eClass code: 23-05-08-07

UNSPSC code: 31171502

 

Suffix Explanation

KDN: KAYDON Reali-Slim® thin section bearing series identifier

 

KAA: Radial cross section 3/16 inch (0.1875 in) × Width 3/16 inch (0.1875 in)

 

17: Inner diameter 1.75 inches

 

C: Radial contact ball bearing (Type C), primarily for radial loads

 

L: Non-metallic cage (GFR nylon)

 

0: CL0 precision clearance class (C0 standard clearance)

 

Important reminder: This model is an open thin-section bearing with no seals, no pre-filled grease and no coating. Lubricant must be added during installation based on actual operating conditions. Operating temperature range: -65°F to +250°F (approx. -54°C to +121°C). Type C radial contact design primarily accommodates radial loads with some bidirectional axial load capacity.

 

2 Structure & Operating Characteristics

Japan NMT KDN.KAA17CL0 is a constant-section thin-section radial contact ball bearing (Type C) . Its core design principle: the cross-section remains constant as the bore diameter increases. This allows designers to use the same thin-section bearing series across different rotating component sizes, greatly simplifying design and selection while achieving significant space and weight savings.

 

KAA specification indicates a cross-section of 3/16" x 3/16" (0.1875 inch radial section, 0.1875 inch width). At 1.75 inch (44.45 mm) bore, the outside diameter is only 53.975 mm (2.125 inches), achieving exceptional space efficiency.

 

Type C radial contact design is the fundamental technical feature. As a single-row radial ball bearing with Conrad-type assembly (no filling slot), it accommodates radial loads and some axial loads in both directions. The standard deep groove raceway design ensures stable operation under combined radial and light thrust loads.

 

Open construction is an important feature. Without seals, pre-filled grease or coating, the design allows users to flexibly select grease or circulating oil lubrication based on actual operating conditions. This is particularly suitable for applications requiring customized lubrication solutions or periodic maintenance.

 

CL0 precision clearance class (C0 standard clearance) ensures high rotational accuracy and low vibration during operation.

 

Non-metallic cage (GFR nylon/fiberglass reinforced nylon) combines light weight with excellent wear resistance, effectively separating balls and reducing operating noise.

 

Selection reference:

 

KDN.KAA17CL0 (CL0 clearance, Type C radial contact, open)

 

KDN.KAA17XL0 (XL0 clearance, Type X four-point contact, for combined loads)

 

3 Core Performance Advantages

1. Type C radial contact design delivers stable and reliable load capacity. Primarily accommodates radial loads while handling some axial loads in both directions. Conrad-type deep groove raceway design ensures stable operation under combined radial and light thrust loads.

 

2. Constant thin-section design delivers ultimate space and weight savings. Single cross-section remains constant as bore increases — at 1.75" bore, OD is only 2.125" with radial section just 3/16" (4.763 mm). Net weight only 0.0227 kg, ideal for weight-sensitive aerospace and robotics applications.

 

3. Open construction enables flexible lubrication customization. Without seals or pre-filled grease, users can select grease or oil lubrication based on actual conditions, adapting to diverse application requirements.

 

4. CL0 precision clearance ensures smooth and accurate operation. Meets stringent requirements of precision instruments, medical equipment and other high-accuracy applications for low vibration and high rotational precision.

 

5. High-strength non-metallic cage delivers low friction and high reliability. GFR nylon cage combines light weight with excellent wear resistance, effectively separating balls and reducing operating noise.

 

6. High precision manufacturing with international standard interchangeability. Made of AISI 52100 bearing steel, ABEC 1F tolerance class, fully interchangeable with KAYDON KAA17CL0, RBC KAA17CL0-RBC and other equivalent models.

 

4 Typical Application Fields

4.1 Industrial Robotics

Lightweight robot arm joints, automation module rotary supports, precision assembly equipment — Type C design handles some axial loads in both directions while supporting radial loads.

 

4.2 Aerospace

Satellite mechanisms, lightweight precision components for aircraft, avionics rotary mechanisms — thin and lightweight characteristics make it ideal for aerospace applications.

 

4.3 Medical Equipment

Surgical robots, CT/MRI and other advanced imaging equipment rotating components — low friction and high running accuracy meet the stringent reliability requirements of medical devices.

 

4.4 Precision Instruments & Optical Equipment

Test instrument rotary supports, optical platform fine-tuning mechanisms, precision positioning devices.

 

4.5 Industrial Machinery & Automation

Space-constrained compact equipment, material handling systems, packaging machinery.

 

5 Assembly Specifications & Usage Guidelines

5.1 Pre-installation Inspection

Verify model and specifications match design requirements. Inspect bearing appearance to ensure no damage or corrosion. Check shaft and housing dimensional tolerances and surface finish against design specifications.

 

5.2 Installation Procedure

Install in a clean environment to prevent dust and contaminants from entering the bearing. Use press-fit method with force applied evenly to the end face of the fitted ring. Never apply force through rolling elements or cage. Keep bearing level during installation and press slowly to avoid tilting that could score raceways.

 

5.3 Lubrication Maintenance

This model comes without pre-filled grease — lubricant must be added during installation based on operating conditions. Grease lubrication limiting speed is 8,260 r/min; oil lubrication limiting speed is 10,320 r/min. High-quality lithium or synthetic grease is recommended. Establish regular oil replenishment schedule; dry running is strictly forbidden.

 

5.4 Environmental Considerations

Operating temperature range: -65°F to +250°F (approx. -54°C to +121°C). As this bearing is open construction, additional sealing protection at the equipment level is recommended in high-dust, high-humidity or chemically corrosive environments. Avoid subjecting the bearing to impact loads beyond design limits.

 

6 Fault Identification

Common failure modes: Rolling element or raceway fatigue pitting, abnormal operating noise increase, significant rotation resistance increase, excessive temperature rise, seizure caused by poor lubrication. If any abnormality occurs, inspect and replace the bearing promptly.