Industrial Equipment Repair Parts Suppliers: Grainger, MSC Industrial, Motion Industries, and Specialty Sources
Your parts strategy is your competitive moat. The industrial repair business that can source a 6205-ZZ bearing or a 3/4" BSPP hydraulic fitting in two hours beats the competitor waiting three days for shipping on every urgent breakdown. Understanding the parts distribution ecosystem — and building credit accounts before you need them — is as important as your technical skills. This guide covers the six parts suppliers every industrial repair business should have accounts with, what each is best for, and how to build a van inventory that handles 80% of common repairs without a parts run.
READY TO TAKE ACTION?
Use the free LaunchAdvisor checklist to track every step in this guide.
The Parts Distribution Landscape
Industrial parts distribution in North America is dominated by three national broadline distributors (Grainger, MSC Industrial, Fastenal) and several category specialists (Motion Industries for power transmission and fluid power, Applied Industrial Technologies for bearings and hydraulics, Brennan Industries for hydraulic fittings). National distributors offer breadth and Net 30 terms; specialists offer deeper inventory and technical expertise in their category. Most industrial repair businesses maintain accounts at 3–5 distributors because no single source stocks everything at competitive prices. Your goal: have at least two sources for every category of parts you regularly use so a stockout at one doesn't delay a customer job.
Grainger: Your Primary Industrial Account
W.W. Grainger (grainger.com) is the largest industrial distributor in North America with over 1.5 million products in stock and same-day pickup at 500+ branch locations. A Grainger KeepStock account gives you online ordering, Net 30 terms, order history for warranty tracking, and volume pricing tiers. Grainger stocks: electric motors (Baldor/ABB, Leeson, Marathon), bearings (SKF, FAG, NSK, Timken), V-belts and synchronous belts, electrical components (contactors, overloads, pushbuttons), safety equipment (LOTO devices per OSHA 1910.147), seals and gaskets, hydraulic components, and hand tools. Open an account online at grainger.com/category/account — you need your EIN, business formation document, and a credit reference. Grainger's pricing for business accounts is 10–30% below list price, and consistent payment history unlocks better terms within 6 months.
Motion Industries: Bearings, Hydraulics, and Power Transmission
Motion Industries (motionindustries.com) is a subsidiary of Genuine Parts Company and the leading specialist distributor for bearings, power transmission components, hydraulic seals and hose, and industrial automation products. With over 6.7 million products and 600+ branch locations, Motion is often faster than Grainger for specialty bearings and hydraulic components. Motion's technical sales reps are some of the most knowledgeable in the business — they can cross-reference bearings by dimension, recommend seal materials for specific fluid compatibility, and spec hydraulic hose assemblies to SAE standards. Motion carries SKF, Timken, NSK, FAG, and Dodge bearings; Parker, Eaton, and Gates hydraulic hose; and Rexnord, Dodge, and Falk power transmission products. For electric motor shaft seals (lip seals, labyrinth seals), Motion's rubber and seals division is typically faster and better stocked than Grainger.
MSC Industrial Direct: Metalworking and Maintenance Supplies
MSC Industrial Direct (mscdirect.com) is strongest in metalworking tools, cutting tools, abrasives, precision measuring instruments, and MRO supplies. For an industrial repair shop doing motor or hydraulic cylinder work that requires machining or precision measuring, MSC is the go-to. MSC carries Mitutoyo, Starrett, and Brown & Sharpe precision instruments; Norton and 3M abrasives; and a full range of taps, dies, and cutting tools. MSC also stocks Fluke instruments, which matters for warranty and calibration. MSC Net 30 accounts are approved through their credit department — apply at mscdirect.com/about/credit. MSC's eProcurement integration with your accounting system (QuickBooks, Sage) simplifies purchase order reconciliation for larger operations.
Brennan Industries and Specialty Hydraulic Sources
Brennan Industries (brennanindustries.com) manufactures and distributes hydraulic and pneumatic fittings, adapters, and tube fittings in JIC, NPT, BSPP, SAE, and metric configurations. For hydraulic repair specialists, Brennan is indispensable — they stock over 40,000 SKUs and offer next-day shipping on most items. Parker Hannifin's distributor network (find a Parker distributor at parker.com) provides factory-direct access to Parker cylinders, pumps, valves, and seals — critical if you're repairing Parker hydraulic equipment. Eaton's distributor network (Hydraulics Division) is similarly important for Eaton/Vickers equipment. Applied Industrial Technologies (applied.com) is the third major bearing and fluid power distributor alongside Motion Industries — their catalog overlaps significantly with Motion but their branch network is stronger in certain regions. Get quotes from both Motion and Applied for your most common parts and use the better-priced source for each category.
Building Your Van Parts Inventory
Stock your service van with parts that cover 80% of common breakdown repairs without a parts run. For a general industrial repair van, this means: the 20 most common bearing sizes in your customer equipment (6000, 6200, 6300 series deep groove ball bearings cover most motors and gearboxes), assorted V-belts and Gates Poly-V belts in common sizes, a hydraulic seal kit assortment (Buna-N, Viton, and polyurethane in common shaft sizes), hydraulic fitting assortment (Parker Push-Lok and JIC fittings in 1/4" to 1" sizes), electrical basics (contactor coils, overload relays, terminal blocks, wire nuts, electrical tape, heat shrink), LOTO devices (Panduit or Master Lock padlocks, lockout hasps, tags — OSHA 1910.147 required), and common fasteners (metric and SAE hex bolts, set screws, split washers). Initial van parts inventory: $3,000–$8,000. Replenish weekly using Grainger's KeepStock mobile app.
RECOMMENDED TOOLS
Grainger
The largest industrial distributor in North America. Open a Net 30 account for motors, bearings, electrical components, safety equipment, and MRO supplies.
Motion Industries
Premier distributor for bearings, hydraulic seals, power transmission, and hose assemblies. 600+ branches for same-day pickup on urgent parts.
MSC Industrial Direct
Industrial tooling, precision measuring instruments, abrasives, and MRO supplies. Net 30 accounts with eProcurement integration for QuickBooks.
Some links above are affiliate links. We may earn a commission if you sign up — at no extra cost to you.
FREQUENTLY ASKED QUESTIONS
How much parts markup should I charge customers?
Standard industrial repair parts markup is 40–60% over your cost. On a bearing you buy for $45, you charge $63–$72 on the invoice. This is industry-standard and customers expect it — they're paying for your ability to have the part on your van or source it same-day, not just the part itself. Parts markup typically represents 25–35% of total job revenue for an established industrial repair business.
Should I carry consignment inventory from distributors?
Some Motion Industries and Grainger branches offer vendor-managed inventory (VMI) programs where they stock parts in your van or shop on consignment — you only pay when parts are used. These programs are typically available to customers spending $5,000+/month with the distributor. As a startup, focus on building your purchase history first; VMI programs become available as your account grows.
How do I handle parts warranty with customers?
Establish a clear warranty policy in your service agreement: typically 90 days on parts and 30 days on labor for industrial repair. Document every part installed (part number, quantity, supplier, date) in your work order system. When a part fails under warranty, your supplier's warranty covers the replacement part cost — most industrial distributors offer 90-day to 1-year warranties on components. Your labor to reinstall is typically not covered by parts warranty, which is why limiting labor warranty exposure in your service agreement is important.
Apply This in Your Checklist