Spindle Parts & Service

What Spindle Parts & Service does

SPS Spindle Parts & Service, LLC is a privately held precision spindle repair, rebuilding, and manufacturing company founded in 2003 and headquartered in Goffstown, New Hampshire. The firm provides a full spectrum of spindle-related services — including inspection, disassembly, component evaluation, bearing replacement, dynamic balancing using Balmac equipment, taper grinding, drawbar rebuilding, and full assembly with testing — across all major machine tool spindle types (motorized, belt-drive, grinding, high-speed, cartridge, and multi-axis milling heads). Core competencies include precision bearing installation, stator and encoder testing via Megar equipment, and custom in-house manufacturing of spindle components such as housings, shafts, and drawbars. The company services spindles from hundreds of brands including DMG MORI, Mazak, Haas, Okuma, Doosan, and Mitsubishi, and has demonstrated capacity for very large assemblies (up to 8,000 lbs). Technicians are factory-trained at Capellini Electrospindles in Piacenza, Italy, under a 2014 strategic partnership that grants SPS exclusive North American distribution and joint-manufacturing rights for Capellini's new spindle product line.

SPS serves eight primary industry verticals — aerospace, automotive, defense, energy, heavy equipment, medical device, tool & die/job shop, and wood products — with named enterprise customers including General Electric, Collins Aerospace, GKN, Pratt & Whitney, Tegra, Symmetry, and Waters. Aerospace is the primary segment, driven by tight tolerance requirements and the customer's lack of spare spindles. The business operates primarily through direct enterprise field sales (phone, email, onsite visits) and a content-marketing-driven website funnel. All services and products are priced via custom quotes, with a 1-year warranty on rebuilds. Revenue derives from a mix of professional services (repair, rebuilding, onsite analysis) and hardware sales (new Capellini spindles, precision bearings, high-frequency drives, Garlock bearing isolators, multi-access heads). Distribution occurs via customers shipping spindles to the Goffstown facility, onsite technician dispatch (notably for taper grinding without spindle removal), and new spindle imports via the Capellini partnership.

The company's revenue is not publicly disclosed and there are no external funding rounds, M&A activity, or ownership changes on record. The firm appears to be founder/owner-operated, with 11-50 employees. Competitive positioning rests on Capellini certification and exclusive North American partnership, technician expertise accumulated over 20+ years, proprietary custom engineering solutions (e.g., the Robodrill coupling that reduces installation time from 3-4 days to 3-4 hours), and the ability to handle oversized, complex spindle assemblies that few competitors can accommodate.

Name

Spindle Parts & Service

Legal name

SPS Spindle Parts And Service, LLC

Website

https://spsspindle.com

Company type

Private

Founded year

2003

Operating status

Operating

Headcount range

11–50 employees

Short description

SPS Spindle Parts & Service is a privately held precision spindle repair, rebuilding, and custom manufacturing firm serving aerospace, automotive, defense, medical, and other industrial manufacturers across North America. Founded in 2003 and based in Goffstown, NH, the company holds exclusive North American distribution for Capellini Electrospindles and services hundreds of machine tool brands.

Ownership category

akta.pro rank

Product category

Machine Tool Spindle Repair & Rebuilding

NAICS

Ball and Roller Bearing Manufacturing (332991), Precision Turned Product Manufacturing (332721)

SIC

Ball & Roller Bearings (3562), Screw Machine Products (3451)

akta.pro primary industry

Spindles & High-Speed Drives (Machine Tool Spindles, High-speed Motors) (IMAGACAL)

akta.pro secondary industries

Linear Motion & Mechanical Power Transmission (Ball/roller screws, linear guides, bearings, couplings) (IMAHAGAM), Grinding, Honing & Superfinishing Equipment (IMAHADAE)

Keywords

• Spindle repair services
• Machine tool rebuilding
• Precision bearings supply
• Onsite taper grinding
• High-frequency spindle drives

Headquarters

HQ city

Goffstown

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Spindle Repair Services: Core revenue stream providing repair services for all types of machine tool spindles including CNC spindles, high-speed spindles, and motorized spindles. Services include inspection, disassembly, component evaluation, repair, and full testing.
2. Spindle Rebuilding: Comprehensive spindle rebuilding including bearing replacement, component reworking, and full assembly with testing. Spindles are disassembled, photographed, quoted, and repaired with new or refurbished components. All work backed by a 1-year warranty.
3. Spindle Component Manufacturing: In-house design, machining, and grinding of spindle components including housings (block or cylindrical), shafts, drawbars, covers, nuts, and spacers. Also offers reverse engineering and 24-hour reload/repair for ball screws.
4. Onsite Taper Grinding Service: On-site taper grinding service performed at customer facilities without removing spindles from machines. Covers CAT, BT, BIG Plus, HSK taper systems. Service includes pre-grind assessment, vibration analysis, drawbar retention testing, taper inspection, runout measurement, and quality control inspection.
5. New Spindle Sales (Capellini Products): Sales of new spindles sourced from Capellini Electrospindles including block spindles, motorized spindles, high-speed spindles, cartridge spindles, grinding spindles (belt-drive and direct), milling spindles, turning spindles, HF spindles for ID grinding, deep hole spindles, and multi-access heads.
6. Gearbox/Transmission Repair: Full-service gearbox and transmission repair ranging from minor bearing replacement to comprehensive overhaul. Includes incoming inspection, disassembly, failure analysis, quotation, in-house machining, component rework, assembly, and quality control.
7. Drawbar Repair and Rebuilding: Complete drawbar rebuilding including Belleville washer replacement, pull stud service, TRP sensor inspection, and air pressure lubrication system service. Drawbar force testing using dynamometer.
8. Precision Bearings Sales: Sales of precision machine tool bearings including high-speed angular contact bearings (steel and ceramic ball), single and double row roller bearings, tapered roller bearings, deep groove ball bearings, and double direction thrust bearings. Includes technical support on preload and speed ratings.
9. Multi-Access Head Sales and Repair: Sales and rebuilding of Capellini multi-access heads designed for light milling, composites, and woodworking. Repair services range from minor bearing replacement to full comprehensive overhaul including milling head bearing and gear replacement.
10. High-Frequency Spindle Drives: Supply, repair, and retrofit of high-frequency drives (inverters, frequency converters) for high-speed electric motors and motorized machine tool spindles. Includes variable speed AC motor drives, engineered drives, and custom AC drives.
11. Ball Screw Repair and Manufacturing: Ball screw repair services with 24-hour reload/repair capability in most cases. Services include OEM ball screws and nut assemblies, acme lead screw assemblies, bridgeport mill retro-fit assemblies, reverse engineering, and new part manufacturing from sample or print.
12. Onsite Spindle Analysis: On-site spindle condition assessment covering drawbar system, tool holding taper, bearing condition, and vibration signature. Provides valuable data for scheduled maintenance planning to prevent unplanned machine downtime.
13. Grind/Plate/Grind Component Reworking: Precision component reworking services for spindle housings, shafts, and drawbars using grind-plate-grind methodology to achieve proper bearing fits per manufacturer specifications.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

Spindle Parts & Service (SPS Spindle) provides precision repair, rebuilding, and remanufacturing services for machine tool spindles — including CNC, high-speed, motorized, grinding, and turning spindles — as well as component manufacturing, gearbox and multi-axis milling head repair, drawbar and ball screw repair, onsite taper grinding, and onsite spindle analysis. The company also distributes new Capellini Electrospindles, precision bearings, multi-axis milling heads, high-frequency spindle drives, and customized Garlock spindle seals, supporting North American manufacturers across aerospace, automotive, defense, energy, heavy equipment, medical, tool & die, and wood products.

Product overview

SPS Spindle Parts and Service operates as a precision spindle repair, rebuilding, and new spindle supply operation rather than a single unified software product. The company offers a comprehensive portfolio organized into three main categories: (1) Repair and Rebuilding Services including spindle repair, spindle rebuilding, component manufacturing, gearbox/transmission repair, multi-axis milling head repair, grind/plate/grind reworking, drawbar repair, onsite spindle analysis, ball screw repair, and onsite taper grinding; (2) Industrial Solutions including precision bearings, multi-axis milling heads, high-frequency spindle drives, and customized spindle seals; (3) New Spindles from Capellini Electrospindles including block spindles, motorized spindles, high-speed spindles, cartridge spindles, grinding spindles, motorspindles, light alloy spindles, turning spindles, HF spindles for ID grinding, milling spindles, belt drive grinding spindles, multi-access heads, deep hole spindles, and custom spindles. The company also provides a Robodrill coupling solution as a proprietary product enhancement.

Differentiator

Problem solved

Functional benefit

Products and services

• Spindle Repair
• Spindle Rebuilding
• Spindle Component Manufacturing
• Gearbox/Transmission Repair
• Multi-Axis Milling Head Repair
• Drawbar Repair
• Onsite Spindle Analysis
• Ball Screw Repair
• Onsite Taper Grinding
• Grind/Plate/Grind Component Reworking
• Precision Bearings
• Multi-Axis Milling Heads
• High-Frequency Spindle Drives
• Customized Spindle Seals (Garlock)
• Capellini Block Spindles
• Capellini Motorized Spindles
• Capellini High-Speed Spindles
• Capellini Cartridge Spindles
• Capellini Grinding Spindles
• Capellini Custom Spindles
• Capellini Light Alloy Spindles
• Capellini Turning Spindles
• Capellini HF Spindles for ID Grinding
• Capellini Milling Spindles
• Capellini Belt Drive Grinding Spindles
• Capellini Deep Hole Spindles
• Capellini Multi-Access Heads

Quantifiable outcome

• Up to 60% reduction in spindle failures using quality spindle seals (Garlock bearing isolators)
• +3 more outcomes

Named customers9 records

Segments9 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Four partnerships are on record, tiered core, significant and supporting.

• Capellini ElectrospindlescoreStrategic or Co-development Partner · 1 January 2014Strategic partnership forged in 2014 with Capellini Electrospindles, a global leader headquartered in Piacenza, Italy. Capellini manufactures precision machine tool spindles and motors used in milling, turning, ID grinding, and OD grinding. The partnership enables SPS to service U.S. companies with European machinery equipped with Capellini systems and expand Capellini's North American OEM market. Select custom spindles are engineered in Italy by Capellini, then manufactured and assembled in the U.S. by SPS. SPS technicians receive factory training at Capellini in Piacenza. The alliance includes joint-manufacturing initiatives with competitive pricing and expedited turnaround for the North American market.
• CNC NorthsignificantStrategic or Co-development PartnerCNC North specializes in building new and rebuilding older grinding machines for automotive, aerospace, and bearing manufacturing. SPS rebuilds and retrofits the existing spindles used in CNC North's rebuilt machines and supplies new state-of-the-art Capellini spindles for both new and rebuilt machines. The large work head spindle used in CNC North's machines was designed by CNC North's co-owner Bob Hawkins, with SPS handling assembly of rebuilt work heads and dressers and providing Capellini-engineered 75K ID grinding spindles.
• GarlocksupportingTechnology or IntegrationSPS has developed a trusting relationship with Garlock and their bearing isolator sealing systems. Garlock's non-contacting bearing isolators protect spindles against humidity ingress, eliminate coolant ingestion, have no speed limitations, and are zero-maintenance. SPS offers these seals as part of its spindle repair and rebuilding services.
• DuplomaticsupportingTechnology or IntegrationDuplomatic is an Italian manufacturer of rotational axes used in machine tool applications. Through the Capellini partnership, SPS has gained expertise in Duplomatic axis drive and clamping systems, as well as the inspection equipment and techniques necessary for verifying position location and accuracy.

Scale indicators8 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• NSK Precision Machine Tool Bearings: NSK is a global leader in precision machine tool bearings and provides spindle bearing solutions across all major OEMs. Overlaps with SPS's precision bearings sales stream and serves the same aerospace/automotive machine tool customer base.
• SKF Machine Tool Bearings: SKF is a global bearings and precision components manufacturer with significant machine tool spindle bearing offerings. Broadly comparable as a major incumbent in the precision bearings market that SPS serves, with broader portfolio reach than SPS's specialized service focus.

Direct peers

• Precision Spindle & Accessories (PSA): PSA specializes in machine tool spindle repair and rebuilding with a service portfolio closely mirroring SPS - including bearing replacement, taper grinding, and component reworking. Directly comparable as a North American spindle service specialist.
• GTI Spindle Technology: GTI Spindle offers spindle repair, rebuild, and new spindle sales for CNC and high-speed applications, with similar coverage of machine tool brands and customer verticals. Directly competes with SPS in the North American spindle service market.
• Fischer Precision Spindles: Fischer Precision manufactures high-speed spindles and offers spindle repair services globally. Comparable to SPS through its dual focus on new spindle manufacturing and precision spindle service, particularly for European-spec spindle products.
• IBAG North America: IBAG manufactures and services high-frequency spindles and motorized spindles for machine tools, with a North American service footprint. Comparable to SPS in new spindle supply and repair of high-speed spindles.
• Setco Spindle Repair: Setco is a U.S.-based precision spindle remanufacturing and repair company serving machine tool users across aerospace, automotive, and heavy equipment. Directly competes with SPS in spindle repair, rebuilding, and new spindle supply with similar service model and customer overlap.
• Cincinnati Spindle: Cincinnati Spindle is a spindle repair and rebuilding company focused on machine tool spindles, including precision bearing and component replacement. Direct competitor in the spindle service space with comparable offerings to SPS.
• Kessler America: Kessler designs and manufactures motorized spindles and spindle systems for machine tools, with a U.S. presence. Overlaps with SPS in new spindle supply and service for high-precision grinding and milling applications.

Emerging players

• Capellini Electrospindles: Capellini is SPS's strategic partner and a leading Italian precision spindle manufacturer. While partnered, they are also a potential future competitor if Capellini elects to expand direct North American distribution - making them adjacent rather than direct peers today.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat4 records

Key risks2 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Spindle Parts & Service