Spindle Applications Company
Close-up of a matched pair of NTN precision angular contact bearings seated on a spindle journal, lit by cold side light

NTN Authorized Distributor

Keep NTN precision-bearing set details intact from repair to purchase.

Spindle Applications Company supplies NTN angular contact, cylindrical roller and support bearings to maintenance engineers, spindle repair specialists and technical buyers, quoted against the full designation and the complete set.

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  1. 01Full designation
  2. 02Precision
  3. 03Preload
  4. 04Set markings
  5. 05Bearing position

One enquiry, five details

Five details travel with every NTN set.

Your NTN designation, precision, preload, set markings and bearing position stay together from the repair file to the written quotation, so what you buy matches the arrangement on record.

  1. Full designation

    The complete NTN reference, not a shortened size code.

  2. Precision

    Confirmed for the spindle, never assumed from bore and width.

  3. Preload

    Stated with the set, so the arrangement is quoted as built.

  4. Set markings

    Kept together, not split across single purchasing lines.

  5. Bearing position

    Tied to the documented spindle layout and machine model.

  • NTN precision focus

    Bearing series for spindles and precision assemblies, identified by precision and preload as well as size.

  • Purchasing by the set

    Matched bearings are discussed as a complete arrangement, so set markings survive purchasing software.

  • Machine specification first

    Alternatives are identified separately, and any technical change needs your approval.

Who sends the enquiry

Three roles. One bearing set.

Maintenance, repair and procurement each check something different on the same NTN set, and each gets the details needed to sign off.

Maintenance engineer inspecting a precision bearing ring on a clean workbench

Precision maintenance engineer

  • Original bearing arrangement
  • Set identification on the parts
  • Approved parts list for the machine
Send Your Original Arrangement
Technical buyer comparing boxed precision bearings at a warehouse inspection table

Technical procurement engineer

  • Offers compared on the exact NTN set
  • Availability and estimated lead time
  • Price, currency and commercial terms
Request a Written Quotation

Customer feedback

What buyers say about the details we keep.

Comments from buyers on how their NTN bearing enquiries and orders were handled.

Our precision machinery shop uses NTN angular contact and cylindrical roller bearings for spindles. This supplier confirms the preload arrangement and precision class, and every bearing arrives with the correct NTN packaging and measurement report.
Hiroshi TanakaHiroshi Tanaka
We needed NTN super-precision bearings for a high-speed spindle build. The supplier provided the measurement report for each bearing, and our engineer verified the internal clearance on arrival. The spindle has run at design speed without issues.
Klaus-Dieter BauerKlaus-Dieter Bauer
When our spindle design required a specific NTN precision execution, the sales engineer walked us through the options. We chose a set that worked, and the machine has held its tolerance through production. That is real engineering support.
Marco RossiMarco Rossi
Pricing on a set of NTN precision bearings for a machine tool retrofit was competitive. The bearings arrived with the correct packaging and documentation, and our quality inspection passed on first sample.
Kim Min-junKim Min-jun
We had an urgent spindle bearing failure on a grinding machine that was holding up a customer order. The supplier identified the correct NTN precision reference, shipped same-day, and the spindle was rebuilt and back in production within the week.
David ChenDavid Chen

NTN bearing range

From the spindle to the supporting positions.

Spindle Applications Company supplies NTN angular contact, cylindrical roller, ball screw support, deep groove and thrust bearings for precision machinery and replacement purchasing.

Precision bearings of different sizes arranged on a clean steel assembly bench 25 NTN bearing categories View All Products
Ball Bearings

Ball Bearings

75 models
Roller Bearings

Roller Bearings

39 models
Special Bearings

Special Bearings

38 models
Bearings by Industry

Bearings by Industry

14 models

Spindle housing and bearing set laid out on an assembly bench in a clean repair workshop

Copy the markings once. Keep the set whole.

Send the complete NTN designation with its set markings, preload and bearing position, and receive a quotation written for the full arrangement.

Send Your Set Markings

Featured products

Choose the series. Quote the exact execution.

Each featured NTN bearing can be quoted singly or as part of a matched set, with 114 products listed across the range.

View All NTN Products
Machine tool spindle assembly opened on a bench with its precision bearings beside it

Spindle set and auxiliary bearings, one enquiry

Same-machine supply

One machine. One bearing enquiry.

Auxiliary bearings can join the same precision-parts enquiry as your spindle set, so one machine stays on one quotation.

  • Single bearings and matched sets
  • Purchasing from machine specifications and approved parts lists
  • Repair documents kept as the reference
Ball screw and its support bearing on a linear axis during a machine retrofit Deep groove ball bearing held above a machine auxiliary unit

Supporting positions, specified properly.

Ball screw support bearings
Supplied to the machine's approved specification.
Deep groove ball bearings
For machine auxiliary components.
Thrust bearings
For clearly defined axial support positions.
Add Auxiliary Bearings to Your Enquiry

Applications

Built around precision machines.

Spindle Applications Company supplies NTN bearings for precision machinery, industrial assemblies, spindle manufacturing and repair, machine tools and retrofits, grinding, and equipment maintenance.

Precision Machinery

Precision Machinery

Precision machinery uses NTN bearings in rotary axes, indexing mechanisms, compact drives and instrument-grade shafts, where running accuracy and low vibration directly affect machine…
Industrial Assemblies

Industrial Assemblies

Industrial assemblies such as gearboxes, reducers, hoists and heavy rotating units rely on bearings to carry combined loads, shock and shaft misalignment over long…
Spindle Manufacturing & Repair

Spindle Manufacturing & Repair

Machine spindles typically combine angular contact ball bearings at the tool or work end with cylindrical roller or support bearings elsewhere on the shaft.…
Machine Tools & Retrofits

Machine Tools & Retrofits

On lathes, machining centers and similar equipment, bearings support spindles, ball screws, linear axes and auxiliary drives, and each position affects positioning accuracy or…
Grinding Machines

Grinding Machines

Grinding machines use bearings in wheel spindles, workheads and auxiliary drives, where surface finish and dimensional accuracy depend on stable, low-vibration rotation. Abrasive dust,…
Equipment Repair & Replacement

Equipment Repair & Replacement

Maintenance teams replace bearings across motors, pumps, compressors, fans, conveyors, agricultural machinery and vehicles, often working from a removed part or maintenance record. Dust,…

View all applications

FAQ

NTN set markings and precision execution

The complete designation and its set markings identify a precision NTN bearing arrangement. These answers cover what to copy.

Which set markings should be copied into the enquiry?

Copy every set marking exactly as it appears on the bearing, approved parts list or repair file. Keep the markings with the full NTN designation rather than splitting them across separate lines. Add the bearing position, so each marking stays tied to its place in the arrangement.

What identifies the required NTN precision execution?

The complete NTN designation identifies it, because the full reference may carry precision, matching or preload information. Bearing dimensions alone do not confirm the execution. For special-execution NTN bearings, supporting documents help confirm the requirement.

Can a replacement differ from the documented spindle arrangement?

Only with your approval. Any alternative is identified separately from the requested designation, and technical changes require the buyer's sign-off. Your documented arrangement remains the reference for the quotation.

Can matched sets and auxiliary bearings go on one enquiry?

Yes. Single bearings, matched sets and auxiliary bearings from the same machine can all be quoted together. List the machine model and each bearing position so the whole requirement stays in one document.

Technical articles

Technical notes for bearing specifiers.

These articles help engineers and technical buyers read NTN precision bearing requirements with more confidence.

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Online quote

Request a quote for your complete NTN set.

Spindle Applications Company is an authorized NTN distributor serving customers worldwide. Send the full bearing details and request a written quotation.

Packed precision bearings stacked on a warehouse shelf, ready for shipment