1 Model Information & Technical Parameters

Model：N 1010 KTN/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 optimized for high-speed precision applications

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

TN: Standard solid polyamide roller-guided cage, lightweight and low friction; continuous operating temperature ≤120°C

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

/SP: Spindle super precision grade with strict control over 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, TN standard polyamide cage, silicon nitride ceramic rollers

Limiting speed: Low-density silicon nitride ceramic rollers reduce centrifugal force at high speed, delivering much higher limiting speed than equivalent all-steel bearings; oil-air lubrication provides optimal performance

Pre-grease: No pre-filled lubricant, lubricant added upon 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 support high roller surface speed, commonly used as radial support for high-speed spindles.

1010: Ultra-light Series 10 with compact cross-section prioritizing higher limiting speed, widely used for medium & small high-speed precision spindles.

K: 1:12 tapered bore. Inner ring expands under nut tension to allow accurate on-site preload adjustment.

TN: Standard polyamide roller-guided cage with low friction. Continuous service temperature limited to 120°C. TNHA reinforced cage version is available for non-stop long-term high-speed operation.

HC5: Hybrid ceramic bearing equipped with silicon nitride rollers featuring low density, high hardness and low friction to suppress heat generation at high rotational speed.

/SP: Super precision spindle grade, tighter accuracy than standard P4 class to maintain stable rotational accuracy during finishing processes.

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 exceeding 120°C is prohibited for TN standard polyamide cage. Preload must be precisely controlled for tapered bore; excessive preload causes sharp temperature rise and weakens high-speed advantages of ceramic rollers. Hammer impact assembly forbidden; uniform axial pressing via hydraulic nut or thermal mounting is recommended. Straight bore variant: N1010 TN/HC5SP. Reinforced cage variant: N1010 KTNHA/HC5SP. All-steel roller tapered bore variant: N1010 KTN/SP.

2 Structure & Operating Characteristics

N 1010 KTN/HC5SP hybrid ceramic super precision single row cylindrical roller bearing adopts thin Series 10 cross-section optimized for high-speed conditions. Silicon nitride ceramic rollers lower centrifugal load and frictional heat at high speed. Equipped with standard TN polyamide cage, it balances cost and basic high-speed performance. The 1:12 tapered bore enables flexible preload adjustment during assembly to adapt to low-speed heavy cutting and high-speed finishing. Separable ring design simplifies spindle disassembly and maintenance.

Selection reference:

N1010 KTN/HC5SP (taper bore, standard TN cage, ceramic rollers, SP super precision, adjustable-preload high-speed spindle with balanced cost & performance)

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

N1010 KTNHA/HC5SP (taper bore, TNHA reinforced cage & ceramic rollers, equipment for long-term non-stop high-speed operation)

N1010 KTN/SP (taper bore all-steel rollers, mid-high speed spindles with budget constraints)

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 coefficient, reducing centrifugal load at high speed, restraining spindle temperature rise and greatly raising limiting rotational speed.

2. 1:12 tapered bore allows flexible on-site preload adjustment during assembly, adapting to multiple machining conditions with better debugging flexibility than fixed-preload straight bore solutions.

3. TN standard polyamide roller-guided cage is lightweight with low friction loss and delivers better cost competitiveness than TNHA variant, satisfying regular continuous high-speed machining demands.

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

5. Separable N-type construction facilitates assembly and maintenance; compact Series 10 cross-section fits the structural layout of medium & small high-speed precision spindles.

4 Typical Application Fields

4.1 Medium & Small Adjustable-Preload High-Speed Precision Machine Tool Spindles

High-speed internal & cylindrical grinder spindles, high-speed engraving & milling machines, small high-speed CNC lathes, medium & small high-speed grinding motor spindles

4.2 High-speed rotary units requiring low temperature rise and preload tuning during assembly

Precision high-speed rotary test fixtures, high-speed grinding power heads, non-standard high-speed precision rotary mechanisms

4.3 Precision rotary machinery mainly subjected to radial loads, pursuing higher limiting speed with controlled procurement cost and on-site adjustable preload

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 workshops. 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 faces is forbidden. Preload magnitude must be finely controlled, as excessive preload sharply increases operating temperature and diminishes ceramic bearing advantages. After assembly, perform long-duration no-load temperature run-in starting from low speed with gradual speed ramp-up. Shaft journal and housing bore geometric tolerances shall comply with /SP precision standards. Respect TN cage temperature limit and avoid prolonged over-temperature operation.

5.2 Selection Guidance

High speed, low temperature rise, adjustable assembly preload, balanced cost and performance → N1010 KTN/HC5SP

Modular mass assembly, fixed spacer preload without on-site adjustment → N1010 TN/HC5SP

24h non-stop long-term high-speed operation requiring high-temperature resistant reinforced cage → N1010 KTNHA/HC5SP

Budget limited, no need for ceramic rolling elements, mid-high speed operation → N1010 KTN/SP

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 advised. Target steady-state temperature rise ≤25K; avoid continuous temperature over 120°C for TN standard polyamide cage. Ceramic rollers demand high lubricant cleanliness; prevent hard contaminants entering raceways and regularly monitor operating temperature variation.

5.4 Environmental Application Notes

No built-in seals. Spindle assembly shall be fitted with oil seals or labyrinth seals to block coolant and dust ingress. Long-term axial load and shock loads are prohibited; impact easily causes edge chipping and fracture of ceramic rollers. Minimize frequent severe thermal cycling to slow dimensional drift of bearing rings.

6 Fault Identification

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