1 Model Information & Technical Parameters

Model：N 1010 KTNHA/HC5SP

Dimensions

Bore d：50 mm

Outer diameter D：80 mm

Width B：16 mm

Bore type: 1:12 tapered bore

Code Explanation

N: Single row cylindrical roller bearing, inner ring double ribs, outer ring ribless, separable inner and outer rings

1010: Size series 10, size code 10, nominal bore 50 mm; ultra-light thin cross-section designed for high-speed operation

K: 1:12 tapered bore, preload adjustable by axial lock nut compression to expand inner ring

TNHA: Reinforced polyamide roller-guided cage, heat-resistant and anti-fatigue for sustained high speed

HC5: Hybrid ceramic configuration, silicon nitride Si₃N₄ ceramic rollers, bearing steel inner & outer rings

/SP: Spindle super precision grade with strict control on dimensional tolerance, raceway geometry and rotational runout

Load Characteristics

Permitted load: Radial load only; axial load capacity negligible and cannot bear axial force independently

Structure: Separable design, inner ring double ribs, TNHA reinforced polyamide cage, silicon nitride ceramic rollers

Limiting speed: Ceramic rolling elements reduce mass and centrifugal force. Combined with high-temperature TNHA cage, limiting speed far exceeds all-steel equivalent bearings. Oil-air lubrication delivers optimal performance

Pre-grease: No pre-filled lubricant, lubricant added on assembly

Logistics & Industry Codes

Net weight：0.12 kg

Indicative carbon footprint：0.16 kg CO₂e

eClass code：23-05-09-01

UNSPSC code：31171505

Suffix Explanation

N: Single row cylindrical roller bearing without outer ribs. Separable rings, simple construction allowing high roller surface speed, commonly used for front support of high-speed spindles.

1010: Series 10 ultra-light cross-section. Compact geometry sacrifices partial load rating for higher limiting speed, widely adopted for high-speed precision spindles.

K: 1:12 tapered bore. Inner ring expands via lock nut tension to accurately set preload during assembly.

TNHA: Modified reinforced polyamide cage, superior heat resistance, wear resistance and creep resistance compared to standard TN cage. Continuous operating temperature up to 130°C.

HC5: Hybrid ceramic bearing with silicon nitride rollers. Low density, high hardness and low friction help reduce heat generation at high rotational speed.

/SP: Super precision spindle class, meeting strict rotational accuracy requirements for finishing and high-speed grinding equipment.

Important reminder: Ribless outer ring cannot carry axial load alone. Spindle system must adopt matched precision angular contact ball bearings for axial support. Continuous operating temperature over 130°C is prohibited for TNHA cage. Preload must be precisely controlled for tapered bore; excessive preload causes sharp temperature rise and negates high-speed advantages of ceramic rollers. Hammer impact assembly forbidden; uniform axial pressing by hydraulic nut or thermal mounting recommended. Straight bore variant: N1010 TNHA/HC5SP. All-steel roller version: N1010 KTNHA/SP. VQ497 stabilized heat treatment suffix is optional.

2 Structure & Operating Characteristics

N 1010 KTNHA/HC5SP hybrid ceramic super precision single row cylindrical roller bearing features thin Series 10 cross-section optimized for high-speed applications. Silicon nitride ceramic rollers greatly lower centrifugal load and frictional heat compared to steel rollers. TNHA reinforced polyamide cage ensures structural stability under prolonged high-speed operation. The 1:12 tapered bore enables flexible on-site preload adjustment to suit different speed ranges. Separable ring design simplifies spindle disassembly and maintenance.

Selection reference:

N1010 KTNHA/HC5SP (taper bore, reinforced cage, ceramic rollers, SP super precision, high-speed spindles with adjustable preload)

N1010 TNHA/HC5SP (straight bore, ceramic rollers, spindle modules with fixed spacer preload)

N1010 KTNHA/SP (taper bore, all-steel rollers, mid-to-high speed equipment with budget constraints)

N1010 KTNHA/HC5SP/VQ497 (plus stabilized heat treatment for non-stop high-speed mass production lines)

Matched bearings: 7010 series precision angular contact ball bearings for axial load support.

3 Core Performance Advantages

1. HC5 silicon nitride ceramic rollers feature light weight and low friction, minimizing centrifugal force at high speed, restraining spindle temperature rise and greatly raising limiting rotational speed.

2. TNHA reinforced polyamide cage offers better heat resistance and anti-fatigue performance than standard TN cage, suitable for long continuous high-speed operation.

3. 1:12 tapered bore allows flexible preload tuning during assembly, adapting to low-speed heavy cutting and high-speed finishing processes.

4. /SP super precision grade delivers tightly controlled rotational runout, maintaining consistent dimensional accuracy for high-speed grinding and engraving & milling.

5. Separable N-type construction facilitates spindle disassembly and maintenance; compact Series 10 cross-section fits layout of medium & small high-speed precision spindle units.

4 Typical Application Fields

4.1 Medium & Small High-Speed Precision Machine Tool Spindles

High-speed internal / cylindrical grinder spindles, high-speed engraving & milling machines, small high-speed CNC lathes, PCB high-speed drilling spindle units

4.2 Continuous high-speed rotary units requiring low temperature rise and adjustable preload

Precision high-speed rotary test fixtures, high-speed grinding power heads, medium-small high-speed grinding motor spindles

4.3 Precision rotary machinery dominated by radial loads, prioritizing maximum speed & low heat, requiring on-site preload adjustment

5 Assembly Specifications & Usage Guidelines

5.1 Assembly Environment & Operation Standards

Super precision hybrid ceramic bearings must be assembled in clean, constant-temperature dust-free workshop. All mating components shall be thoroughly cleaned of chips, oil and contaminants. Uniform axial preload is applied via hydraulic nut on tapered bore; striking bearing face is forbidden. Preload magnitude must be finely controlled, as excessive preload will eliminate the low-heat benefit of ceramic rollers. After assembly, perform step-up long-duration no-load temperature run-in starting from low speed. Shaft journal and housing bore geometric tolerances shall comply with /SP precision standards. Respect TNHA cage maximum operating temperature.

5.2 Selection Guidance

Maximum speed priority, low temperature rise, on-site adjustable preload → N1010 KTNHA/HC5SP

Modular mass assembly with fixed spacer preload → N1010 TNHA/HC5SP

Budget limited, mid-high speed operation without ceramic rolling elements → N1010 KTNHA/SP

Non-stop continuous high-speed mass production, dimensional drift suppression required → N1010 KTNHA/HC5SP/VQ497

Significant axial load exists: Combine this bearing with matched 7010 series precision angular contact ball bearings.

5.3 Lubrication Maintenance Instruction

No lubricant pre-filled at factory. High-speed spindle grease for medium-low speed; oil-air lubrication strongly recommended for high speed. Long-term oil bath lubrication is not recommended. Target steady-state temperature rise ≤25K; avoid continuous temperature over 130°C for TNHA reinforced polyamide cage. Ceramic rollers demand higher lubricant cleanliness. Prevent foreign particles entering raceways; regularly monitor oil temperature and temperature rise curve.

5.4 Environmental Application Notes

No built-in seals. Spindle assembly shall be equipped with oil seals or labyrinth seals to block coolant and dust ingress. Long-term axial load and shock loads are prohibited; impact may cause edge chipping and fracture of ceramic rollers. Avoid contaminants entering rolling contact zones; hard particles easily lead to ceramic element damage. Minimize frequent severe thermal cycling to slow dimensional variation of rings.

6 Fault Identification

Common failure modes: Abnormal temperature rise at high speed, progressive increase of spindle radial runout, periodic abnormal noise, edge chipping of ceramic rollers, raceway indentations, gradual loss of machining accuracy. Stop equipment immediately upon sudden temperature shift, abnormal noise or obvious accuracy decline. Bearings with fractured ceramic rollers or raceway spalling cannot be repaired and require complete replacement.