1 Model Information & Technical Parameters

Model：N 1016 TN/SP

Dimensions

Bore d：80 mm

Outer diameter D：125 mm

Width B：22 mm

Bore type: Straight cylindrical bore

Radial clearance: C1 minimal internal clearance

Accuracy class: SP precision grade

Structure: N single row design, inner ring with two ribs, ribless outer ring allowing axial floating

Outer ring flange: None

Lubrication groove: No groove or oil holes on outer ring, no support for on-line re-lubrication during running

Seal: Open design, no seals

Surface coating: Uncoated

Pre-lubrication: No lubricant supplied from factory

Code Explanation

N: Single row cylindrical roller bearing, two ribs on inner ring, ribless outer ring with axial floating capacity to compensate spindle thermal elongation, mainly for radial loads.

1016: Size series 10 narrow cross-section spindle bearing with outstanding high-speed performance.

TN: Standard non-metallic roller-guided cage suitable for medium and high speed applications.

SP: Precision accuracy grade, dimensional tolerance and rotational runout meet requirements of general high-precision machining spindles.

Load & Speed Data

Basic dynamic load rating Cr：69.3 kN

Basic static load rating C0r：93 kN

Permissible speed, grease lubrication：8 500 r/min

Permissible speed, oil-air lubrication：9 000 r/min

Material & Additional Properties

Rolling element material: Bearing steel

Indicative carbon footprint：3.4 kg CO₂e

Net weight：0.906 kg

eClass code：23-05-09-01

UNSPSC code：31171505

Suffix Explanation

N: Single row cylindrical roller bearing. Two ribs on inner ring guide rollers; ribless outer ring floats axially to absorb thermal expansion, designed for radial loads only.

1016: Series 10 narrow-section spindle bearing with low friction and superior limiting rotational speed.

TN: Non-metallic roller-guided cage, lightweight, lower heat generation and stable operation at high speed.

SP: Precision tolerance standard widely used for conventional high-precision cutting and grinding spindles.

C1 clearance: Minimal radial internal clearance, suitable for lightly preloaded intermittently running spindles to suppress vibration and guarantee surface machining accuracy.

Important reminder: This straight bore N-type single row cylindrical roller bearing has no W33 outer ring lubrication groove. On-line grease or oil replenishment during machine operation is not available, lubrication maintenance can only be carried out when equipment stops. The axially floating outer ring can only withstand radial loads and cannot resist axial force; paired angular contact ball bearings must be adopted for spindle axial positioning. Open bearing without built-in seals; labyrinth seals or oil seals must be installed on housings to block coolant and dust. No pre-filled grease upon delivery. Ideal for intermittently operated high-speed precision spindles with scheduled downtime maintenance rather than non-stop on-line lubrication.

Alternative variants:

N1016 TN/UP (straight bore, UP ultra-precision grade, no lubrication groove, ultra-precision intermittent finishing spindles)

NU1016 TN/SP (inner ring ribless, outer ring double ribs, opposite installation structure of N type)

N1016 KTN/SP (1:12 tapered bore, SP precision grade, no lubrication groove, supports on-site preload adjustment)

2 Structure & Operating Characteristics

N 1016 TN/SP is an SP precision grade single row cylindrical roller bearing with C1 minimal radial clearance, TN non-metallic cage, bearing steel rolling elements and straight cylindrical bore. No lubrication channel on outer ring. Single-row roller arrangement brings lower friction and higher limiting speed compared with same-size double row cylindrical roller bearings. The N-type ribless outer ring slides freely in axial direction to compensate spindle thermal expansion and eliminate extra axial stress caused by temperature rise.

Core features: Narrow single-row structure + high-speed stable TN cage + easy straight bore assembly. Straight cylindrical bore enables convenient assembly and stable preload after installation. SP precision grade satisfies accuracy standards of mainstream precision machining equipment. The grooveless outer ring simplifies structure and reduces outer dimension, perfect for spindles with limited housing space. The limitation is that continuous on-line lubrication is unavailable; re-lubrication can only be completed during shutdown maintenance.

Selection guide:

N1016 TN/SP (single row straight bore, TN cage, SP precision, no lubrication groove, intermittent machining, offline maintenance lubrication, priority for high speed)

NN3016 TN/SPW33 (double row straight bore, SP precision, W33 groove, continuous mass production, 24h on-line re-lubrication, higher radial rigidity)

N1016 TN/UP (single row straight bore, UP ultra-precision, no lubrication groove, mirror-grade intermittent finishing)

N1016 KTN/SP (1:12 tapered bore, SP precision, no lubrication groove, requires on-site spindle preload adjustment)

Recommended matching bearing: Paired 7016 SP angular contact ball bearings to bear all axial loads and realize bidirectional spindle axial positioning.

3 Core Performance Advantages

1. Single-row roller layout delivers low friction loss, high limiting speed and excellent heat control under high-speed conditions.

2. N-type narrow cross-section design features compact outline, fits spindle units with limited installation space.

3. Straight cylindrical bore simplifies assembly and maintains stable preload, suitable for standardized mass spindle assembly.

4. Lightweight TN non-metallic cage reduces vibration and ensures smooth operation under continuous medium-high speed.

5. SP precision standard combined with C1 minimal radial clearance guarantees stable rotary accuracy and effectively suppresses machining chatter marks.

6. Axially floating outer ring automatically compensates spindle thermal elongation, avoids extra stress induced by temperature rise and extends service life.

4 Typical Application Fields

4.1 Main and sub spindles of precision CNC lathes

Intermittent shift production, regular downtime maintenance, requirements for high speed and low heat generation

4.2 Compact high-speed internal & external grinding spindles, tool grinding spindles

Machines undergo daily shutdown inspection and lubrication, no demand for 24h non-stop on-line oil supply

4.3 Rotary shafts and indexing rotary mechanisms for automated production tooling

Compact installation space, mainly subjected to radial loads with intermittent start-stop cycles

4.4 Auxiliary high-speed rotary spindles for medium & small precision milling machines

5 Assembly Specifications & Usage Guidelines

5.1 Assembly Environment & Operation Standards

SP precision bearings should be assembled in clean dust-proof workshops. Thoroughly remove contaminants on shaft journals, housing bores and spacer mating surfaces. Straight cylindrical bore requires appropriate interference fit with uniform press fitting; hammer impact is strictly forbidden. No oil supply channel on outer ring, so no continuous on-line lubrication port needs to be reserved on housing. Reliable sealing must be equipped on machine housings to block coolant and dust ingress. This N-type bearing cannot withstand axial loads; paired SP grade angular contact bearings are mandatory for spindle axial positioning. Avoid long-term continuous shock loads.

5.2 Selection Guidance

Intermittent machining, regular downtime lubrication maintenance, high rotating speed demand → N1016 TN/SP

24-hour non-stop mass production, on-line re-lubrication required during operation, higher radial rigidity needed → NN3016 TN/SPW33

Intermittent equipment for mirror finishing requiring ultra-high rotary accuracy → N1016 TN/UP

Flexible on-site preload adjustment required → N1016 KTN/SP

Important notice: N single row structure is designed for radial loads only. Sustained axial force causes roller edge stress concentration, resulting in scuffing and premature fatigue spalling. No lubrication groove on outer ring, do not connect continuous oil supply system forcibly, which easily leads to excessive lubricant and churning heat.

5.3 Lubrication Maintenance Instruction

No lubricant pre-filled at factory. Grease lubrication and oil-air lubrication are applicable, but re-lubrication maintenance can only be implemented when equipment stops. Select long-life lubricant suitable for high-speed working conditions and refill strictly according to maintenance cycles; avoid long-term continuous operation without maintenance. Continuously monitor spindle temperature rise and vibration; shut down and inspect lubrication status once abnormal heating occurs.

5.4 Environmental Application Notes

Open structure without built-in seals; labyrinth seals or oil seals must be installed on bearing housings. Rolling contact surfaces are highly sensitive to hard particle contaminants. Foreign matter intrusion easily causes raceway pitting and permanent accuracy loss. TN cage fits regular medium-high speed working conditions; avoid long-term exposure to extreme high temperature which accelerates cage aging and damage.

6 Fault Identification

Common failure modes: periodic chatter marks on workpieces, enlarged fluctuation of machining dimensions, excessive temperature rise during spindle operation, periodic abnormal noise, roller scuffing, raceway fatigue pitting. Typical failures for straight bore bearings: persistent overheating caused by excessive assembly interference; outer ring creep wear due to insufficient interference; dry friction from lubrication depletion beyond maintenance cycle; unilateral roller abrasion induced by unexpected axial loads. Shut down equipment immediately upon continuous accuracy degradation, abnormal temperature rise or abnormal noise. Bearings with permanent damage to raceways, rolling elements or cage cannot be repaired and need complete replacement.