FELLOWS Repair Services India
Fellows Corporation, headquartered in Springfield, Illinois, is a global leader in precision gear cutting machinery and broaching equipment. For over a century, Fellows has engineered world-class solutions for hobbing, shaping, shaving, and finishing gears used across automotive, aerospace, and heavy industrial sectors. Their machines are foundational to gear manufacturing worldwide, including in India's automotive and power transmission industries.
Fellows Corporation, headquartered in Springfield, Illinois, is a global leader in precision gear cutting machinery and broaching equipment. For over a century, Fellows has engineered world-class solutions for hobbing, shaping, shaving, and finishing gears used across automotive, aerospace, and heavy industrial sectors. Their machines are foundational to gear manufacturing worldwide, including in India's automotive and power transmission industries.
Synchronics repairs and maintains Fellows precision machine control systems, spindle drives, hydraulic governors, and CNC retrofit electronics. With 180+ engineers across Vadodara, we specialise in Fellows machine downtime resolution — from servo amplifier faults to spindle speed regulation and tool indexing system failures. Indian manufacturers trust Synchronics for rapid Fellows equipment repair because we understand gear-cutting machine dependencies and deliver factory-standard diagnostics.
Expert repair of Fellows precision machine electronics and spindle control systems across India.
FELLOWS Product Lines We Repair
Our engineers are trained on the full FELLOWS product range. Below are the major product families we service.
Fellows Hobbing Machines (500, 600, 700 Series)
High-precision involute gear hobbing systems used in automotive transmission manufacturing. Common issues include spindle runout, feed servo instability, and indexing system encoder failures affecting gear tooth accuracy.
Fellows Gear Shaper Systems (GEAR-SHAPER 400, 450)
Precision shaping machines for internal and external gears. Repair focus includes shaping cutter spindle bearing wear, hydraulic pressure regulation faults, and numerical control board failures causing tool chatter.
Fellows Gear Shaving Machines (GSM Series)
Finishing machines for precision gear surface refinement in high-volume automotive production. Common faults include spindle thermal runaway, feed rate servo hunting, and coolant system sensor degradation.
Fellows Broaching Machines (FB-2000, FB-3000)
Hydraulic and CNC-controlled broaching systems for keyways, splines, and internal features. Typical repairs address proportional valve drift, stroke limit switch malfunction, and position feedback transducer failure.
Fellows Speed Reducers and Spindle Drives
Precision gearbox assemblies and spindle motor drives integral to hobbing and shaving machine speed control. Issues include bearing preload loss, oil seal degradation, and motor winding faults.
Fellows Control Systems and CNC Retrofit Kits
Legacy and modern numerical control boards, tool indexing logic, and servo amplifiers for Fellows machine modernisation. Repair involves PCB level diagnostics, servo tuning, and encoder interface restoration.
Why Choose Synchronics for FELLOWS Repairs?
PCB-Level Expertise
We repair down to the component level — not just swap boards. Our engineers identify root causes, replace failed IGBTs, capacitors, processors, and gate drivers on FELLOWS equipment.
Fast Turnaround
Standard 7–10 working days. Express 3–5 days available for critical breakdowns. Emergency same-day/next-day service for unplanned downtime.
6-Month Warranty
Every repaired unit ships with a 6-month comprehensive warranty on parts and labour. Our repair success rate is over 94% across all brands.
All-India Service
Couriered repairs accepted from any city in India. Doorstep pickup available in Vadodara, Mumbai, Pune, Ahmedabad, Surat, Chennai, and more.
Common FELLOWS Equipment Faults We Fix
Based on 30+ years of repair data, these are the most frequent failure modes we see in FELLOWS equipment arriving at our workshop.
- ✓Spindle runout and bearing preload loss — Fellows precision spindles operate at 500-2000 rpm with tight radial/axial runout tolerances (±0.002 inch). Extended duty cycles and inadequate spindle oil circulation cause angular contact bearing preload degradation, manifesting as spindle chatter and gear tooth surface finish defects.
- ✓Feed servo hunting and feed rate instability — Fellows hobbing and shaving machines use proportional solenoid valves and LVDT position transducers for feed control. Transducer signal drift, proportional valve spool stiction, or servo amplifier tuning loss causes oscillation around commanded feed rate, degrading gear tooth quality.
- ✓Tool indexing system encoder failure — Fellows gear shaper and broaching machines index cutting tools via rotary encoders or resolver transducers. Vibration, coolant splash, and cable flexure fatigue cause encoder signal loss or intermittent pulses, preventing accurate tool indexing and tool-to-workpiece alignment.
- ✓Hydraulic proportional valve spool stiction and pressure regulation fault — Fellows broaching and shaper machines use proportional solenoid spool valves for feed and cutting pressure control. Coolant contamination, varnish buildup, and spool rod corrosion cause stiction, resulting in delayed valve response and cutting pressure overshoot that damages tools or workpieces.
- ✓Coolant system temperature sensor and pump motor failure — Fellows machines require precise coolant temperature control (65-75°C) for gear surface finish consistency. RTD temperature sensors fail due to coolant chemical attack; pump motors burn out from cavitation or bearing wear, causing coolant supply loss.
- ✓CNC control board failure and servo amplifier module burnout — Legacy Fellows CNC boards and servo amplifiers experience age-related capacitor degradation, thermal stress from spindle heat, and power supply voltage spikes from machine switching transients. Board failure disables all automated functions or causes servo amplifier IGBT short circuits.
How We Repair Your FELLOWS Unit
Receive & Log
Your unit is logged into our tracking system with a unique job number. You receive WhatsApp / email updates at every stage.
Fault Diagnosis
Board-level diagnosis using oscilloscopes, LCR meters, and thermal cameras. Root cause identified before any repair begins.
Component Repair
Faulty ICs, capacitors, MOSFETs, IGBTs, and gate drivers replaced with genuine or equivalent-spec components.
Full-Load Test
Unit tested under rated load with original or equivalent motor. All parameters verified. 6-month warranty issued.
Industries Using FELLOWS Equipment
We serve plant maintenance teams across all major industries where FELLOWS automation is deployed.
Frequently Asked Questions — FELLOWS Repairs
Do you repair Fellows equipment anywhere in India?+
Yes. Synchronics repairs the complete Fellows precision machine and control system range — hobbing machines, shapers, shaving equipment, broachers, spindle drives, and CNC retrofit electronics. We offer PAN India scheduled pickup from Mumbai, Delhi, Pune, Bangalore, Chennai, Hyderabad, Ahmedabad, Indore, and all major automotive and manufacturing hubs. All repairs are performed at our ISO-certified Vadodara facility with same-day diagnostics and 48-72 hour turnaround for most faults.
What is the typical repair cost and lead time for a Fellows hobbing machine spindle repair?+
Spindle TIR restoration typically costs INR 35,000-60,000 depending on bearing condition and preload adjustment scope. Lead time is 5-7 days from collection. If bearing replacement is required, additional costs apply (OEM bearings: INR 15,000-25,000 per set). Synchronics provides spare bearing quotes upfront and performs TIR verification at our test lab before return shipment.
Do you stock OEM Fellows spare parts and can you supply bearings, seals, and proportional valves?+
Synchronics maintains a stock of common Fellows OEM bearings, seal kits, proportional solenoid cartridges, encoder units, and RTD temperature sensors. For legacy machines (1990s-2000s), we source through Fellows USA and international distributors with typical delivery of 2-3 weeks. We also supply cross-compatible high-grade industrial bearings and seals (Timken, FAG, Bosch Rexroth) with full technical compatibility verification.
Can you help diagnose Fellows machine faults over the phone or video call before sending equipment to Vadodara?+
Yes. Synchronics offers remote diagnostics and technical consultation. Contact our Fellows specialist team with machine model number, fault description, and any error codes displayed on the CNC control board. We can guide you through basic checks and advise whether equipment should be shipped for workshop repair or if onsite troubleshooting by our field engineers is recommended. Many faults (servo tuning, proportional valve recalibration) can be resolved without travel.
Do you provide onsite repair services for large Fellows gear hobbing or shaping machines that cannot be transported?+
Yes. For large machine installations across Indian automotive and heavy engineering plants, Synchronics dispatches field engineers to perform spindle repairs, servo amplifier replacement, control board diagnostics, and proportional valve service onsite. We carry portable test equipment and OEM components. Onsite services are priced on a per-visit basis (travel, labour, parts separate). Contact our dispatch team at Vadodara with machine location and fault details for quotation.
How do I send my FELLOWS unit for repair?+
Pack the unit securely and courier it to our Vadodara workshop. Include a note with the fault description and your contact details. We will log it into our system and WhatsApp you a job number within 24 hours of receipt. Doorstep pickup is available in Vadodara, Ahmedabad, Surat, Mumbai, and Pune.
What is the cost of repairing a FELLOWS drive or PLC?+
Repair cost depends on the model and the fault. We offer a free diagnosis — once we identify the fault, we provide a fixed quotation before proceeding. Typical repairs cost 20–40% of the new unit price. We will never repair without your approval.
What warranty do you provide on FELLOWS repairs?+
All repaired units carry a 6-month comprehensive warranty covering the same fault and related issues. If the fault recurs within the warranty period, we repair it free of cost.
Do you provide a no-fix, no-fee guarantee?+
Yes. If we cannot repair your FELLOWS unit after diagnosis, you pay only the diagnosis fee (₹500–₹1,500 depending on the product). The unit is returned to you at no additional charge.
FELLOWS Repair Catalog
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Don't See Your FELLOWS Model Listed?
We repair the full range of FELLOWS industrial electronics — even if the specific model is not yet in our catalog. Send us the unit details and we'll confirm repairability within 24 hours.
Free evaluation • 6-month warranty • PAN India pickup
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Back in Action — Fast
Send us your faulty industrial electronics. Our engineers will diagnose it and provide a detailed quote within 24 hours — with no obligation to proceed.
Free Evaluation
No obligation
48hr Turnaround
Fastest in India
6-Month Warranty
Every repair
No Fix, No Charge
Zero risk policy
Pan-India Pickup
Doorstep service