NKI17/16-XL / NKI17-16 Light Duty Type Small Needle Bearings With Oil Hole 17*29*16 mm

NKI17/16-XL and NKI17-16 are metric single row drawn cup needle roller bearings complete with solid machined inner ring, unified core dimension Fw=17mm, outer diameter D=29mm, overall width C=16mm. Two part numbers correspond to identical physical structure, XL stands for standardized lightweight optimized production version.

This NKI series integrates stamped thin steel cage and dense needle roller arrangement, delivering ultra-high radial load capacity under ultra-narrow radial installation space. Matched precision solid inner ring avoids high hardness finish grinding on mating shaft, greatly simplifying shaft processing flow. Open both ends design supports convenient re-lubrication and excellent heat dissipation, only withstand pure radial load. Widely used for miniature gearboxes, textile machinery, automation rotary components, small hydraulic pumps and light industrial transmission assemblies with strict radial space restrictions.

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Fw (Needle assembly inner diameter): 17 mm
Inner ring bore d: 17 mm
Outer Diameter D: 29 mm
Overall Width C: 16 mm
Structure: Single row drawn cup needle bearing with separable solid inner ring
Material: Drawn cup, needle rollers & inner ring GCr15 high-carbon chrome bearing steel
Retainer: Stamped carbon steel cage
Standard Radial Clearance: CN normal clearance
Reference grease limiting rotation speed: 14800 r/min
Oil lubrication limiting rotation speed: 18600 r/min
Minimum chamfer r: 0.5 mm
Matching shaft surface only needs ordinary finishing without quenching hardening

Optimized lightweight standard production version, consistent load and dimension data
Dynamic Load Cr: 10200 N
Static Load Cor: 15400 N
Net Weight: 0.022 kg

Basic standard model same outline size and load parameters as XL version
Dynamic Load Cr: 10200 N
Static Load Cor: 15400 N
Net Weight: 0.022 kg
Complete dimensional drawings and full technical load data of two models are available upon customer request.

1. Separable precision machined solid inner ring, eliminate high hardness grinding process for matching shaft, effectively reduce shaft manufacturing cost and processing cycle
2. Ultra-slim radial cross-section greatly reduces equipment radial occupied space, perfect for miniaturized compact transmission structural design
3. Dense needle roller uniform layout brings outstanding radial rigidity and heavy load capacity, stable continuous medium-speed operation under light alternating impact load
4. Stamped thin steel cage evenly separates needle rollers, low friction loss, good heat dissipation and smooth rolling performance for long-cycle non-stop equipment operation
5. Dual part number same-size design facilitates different procurement and replacement standard requirements of global customers
6. Customizable options include double-sided 2RS contact rubber seals, C3 enlarged radial clearance, stainless steel anti-rust drawn cup, OEM laser marking and high-temperature wear-resistant grease filling

Effectively simplify transmission shaft machining procedures and extend service life of compact gearbox and rotary transmission assemblies

This NKI17/16-XL / NKI17-16 solid inner ring needle roller bearing set is widely matched for the following compact light & medium industrial equipment:

• Miniature reduction gearboxes, small transmission box intermediate and output shaft supporting assemblies
• Textile weaving looms, printing small machinery tension roller rotary units
• Automation equipment cam rotary parts and miniature linear sliding support components
• Light hydraulic oil pump, micro valve core lightweight rotary sliding assemblies
• Small packaging machinery, office equipment and household appliance transmission parts
• Aftermarket replacement spare parts for 17mm bore solid inner ring drawn cup needle roller bearing equipment

Ideal compact high radial load bearing solution for narrow radial space industrial transmission equipment

• 25 years of professional NKI series solid inner ring drawn cup needle roller bearing manufacturing experience
• Two models fully dimensionally interchangeable with international standard NKI17/16 series bearings, consistent dimensional tolerance and load performance indicators
• Complete OEM & ODM customized service supporting double-sided sealing, stainless steel shell and special clearance customization
• Full-process strict inspection: raw material hardness testing, inner ring raceway superfinishing precision, roller arrangement uniformity and dynamic load fatigue cycle testing before delivery
• Professional bearing engineering team provides shaft housing matching installation guidance within 24 hours
• Stable large-scale mass production assembly lines with preferential bulk wholesale price for long-term machinery equipment manufacturers

We focus on stable heavy radial load performance, long service life and long-term win-win cooperation with global industrial buyers

• Raw material chemical composition and surface hardness inspection of GCr15 chrome bearing steel
• Precision deep drawing forming for outer cup, turning and mirror superfinishing processing for solid inner ring raceway
• Standardized constant temperature heat treatment process to stabilize internal metal stress and improve wear resistance
• Comprehensive performance testing: radial clearance uniformity, dynamic/static load capacity, rolling smoothness and heat dissipation performance
• Uniform needle roller assembly inspection and separate dimensional & appearance re-inspection for each model before anti-rust packaging and shipment

Every batch of bearings passes full sampling reciprocating cycle durability test to guarantee stable heavy radial load continuous operation

If you need high-quality NKI17/16-XL optimized version and NKI17-16 standard solid inner ring drawn cup needle roller bearings for miniature gearbox and automation transmission equipment, send your inquiry to us directly.
You will receive full professional supporting services after submitting inquiry:

• Fast official factory quotation reply within 24 hours
• One-on-one shaft housing matching parameter guidance by professional bearing engineers
• Customized bearing solution suggestions including double 2RS sealed variants and stainless steel anti-rust drawn cup options
• Competitive direct factory bulk wholesale price for mixed two-model combined bulk orders

Send your required purchase quantity of each model and equipment working environment to obtain detailed formal quotation

• Q1: What is the difference between NKI17/16-XL and NKI17-16?
  A1: Both share identical overall dimensions, load capacity and installation size; XL is optimized lightweight standardized production suffix for international procurement standards.
• Q2: What advantage does NKI series bearing with inner ring have?
  A2: Equipped with separable precision machined solid inner ring, the mating shaft does not need quenching and superfinishing, lowering shaft processing cost.
• Q3: Can NKI needle bearings bear axial load?
  A3: Designed purely for radial load, not suitable for continuous bidirectional axial force working conditions.
• Q4: What is your standard delivery cycle for NKI17 series needle bearings?