--- title: Critical Spares Guide description: Reduce downtime in aggregate operations with our Critical Spares Checklist. Identify, prioritize, and plan spares for crushers, conveyors, and screens. --- ![Hamburger Menu](https://content.applied.com/hubfs/raw_assets/public/Applied_June2024/images/menu-hamberger.svg "Hamburger Menu") Browse ![Search](https://content.applied.com/hubfs/raw_assets/public/Applied_June2024/images/search.svg "Search") [![Applied Industrial technologies](https://content.applied.com/hs-fs/hubfs/raw_assets/public/Applied_June2024/images/logo-2x.jpg?width=1200&height=331&name=logo-2x.jpg "Applied Industrial technologies")](https://www.applied.com/) ![search](https://content.applied.com/hubfs/raw_assets/public/Applied_June2024/images/searchbar.svg "search") [![Account](https://content.applied.com/hubfs/raw_assets/public/Applied_June2024/images/account.svg "Account")](https://www.applied.com/login) [ Sign In ](https://www.applied.com/login) [ Register ](https://www.applied.com/register) ![search](https://content.applied.com/hubfs/raw_assets/public/Applied_June2024/images/searchbar.svg "search") [![ALT](https://content.applied.com/hubfs/raw_assets/public/Applied_June2024/images/ait-logo-white.svg "ALT")](https://www.applied.com/) ![Close Button](https://content.applied.com/hubfs/raw_assets/public/Applied_June2024/images/close-white.svg "Close Button") - Products - [Products](https://www.applied.com/c/0) - Bearings - [Bearings](https://www.applied.com/c/1859) - [Accessories](https://www.applied.com/c/268) - [Ball Bearings](https://www.applied.com/c/84) - [Ball Screw & Spindle Bearings](https://www.applied.com/c/155) - [Ball Transfers](https://www.applied.com/c/291) - [Bearing Inserts](https://www.applied.com/c/250) - [Cam Followers](https://www.applied.com/c/1739) - [Cartridge Units](https://www.applied.com/c/1063) - [Duplex Units](https://www.applied.com/c/78) - [Flange Brackets](https://www.applied.com/c/2009) - [Flange Units](https://www.applied.com/c/45) - [Hanger Units](https://www.applied.com/c/270) - [Paver Bearings](https://www.applied.com/c/1811) - [Pillow Blocks](https://www.applied.com/c/2212) - [Plain Bearings](https://www.applied.com/c/343) - [Rod Ends](https://www.applied.com/c/2261) - [Roller Bearings](https://www.applied.com/c/1276) - [Special Bearing Types](https://www.applied.com/c/750) - [Take-Ups](https://www.applied.com/c/269) - Couplings & Universal Joints - [Couplings & Universal Joints](https://www.applied.com/c/614) - [Chain Couplings](https://www.applied.com/c/68) - [Clamping Couplings](https://www.applied.com/c/125) - [Cover & Element Assemblies](https://www.applied.com/c/764) - [Cross & Bearing Style Yokes](https://www.applied.com/c/1225) - [Delrin Coupling Chains](https://www.applied.com/c/271) - [Disc Couplings](https://www.applied.com/c/86) - [Doughnut Couplings](https://www.applied.com/c/70) - [Elastomeric Couplings](https://www.applied.com/c/76) - [Flex-Link Couplings](https://www.applied.com/c/123) - [Fluid Couplings](https://www.applied.com/c/96) - [Gear Couplings](https://www.applied.com/c/90) - [Grid Couplings](https://www.applied.com/c/97) - [Jaw Couplings](https://www.applied.com/c/100) - [Mini Complete Couplings](https://www.applied.com/c/3266) - [Mini Hubs & Elements](https://www.applied.com/c/3266) - [Motion Control Bearings](https://www.applied.com/c/116) - [Pin Type Couplings](https://www.applied.com/c/130) - [Sleeve Couplings](https://www.applied.com/c/124) - [Spacer Couplings](https://www.applied.com/c/2321) - [Spring Couplings](https://www.applied.com/c/788) - [Tire Couplings](https://www.applied.com/c/102) - [Universal Joints](https://www.applied.com/c/106) - [Wing, Block & Round Bearing Cross Kits](https://www.applied.com/c/3287) - Electric Motors - [Electric Motors](https://www.applied.com/c/434) - [AC Motors & Accessories](https://www.applied.com/c/131) - [Bearing Protection Rings](https://www.applied.com/c/163) - [DC Motors & Accessories](https://www.applied.com/c/151) - [Dynamic Braking](https://www.applied.com/c/162) - [Encoders & Accessories](https://www.applied.com/c/170) - [Motor Accessories](https://www.applied.com/c/178) - [Motor Bases](https://www.applied.com/c/182) - [Motor Brakes](https://www.applied.com/c/177) - [Servo Motors & Accessories](https://www.applied.com/c/167) - Filtration - [Filtration](https://www.applied.com/c/53) - [Filter Carts](https://www.applied.com/c/1128) - [Filtration Instrumentation](https://www.applied.com/c/1129) - [Filtration Units](https://www.applied.com/c/1314) - [Hydraulic Filters](https://www.applied.com/c/4420) - [Leak Detection Products](https://www.applied.com/c/64) - [Magnetic Filtration](https://www.applied.com/c/4988) - [Reservoir Breathers](https://www.applied.com/c/95) - [Strainers & Components](https://www.applied.com/c/3246) - General Industrial Products - [General Industrial Products](https://www.applied.com/c/456) - [Batteries](https://www.applied.com/c/458) - [Cable Ties](https://www.applied.com/c/2793) - [Carts & Trucks](https://www.applied.com/c/4402) - [Casters & Wheels](https://www.applied.com/c/54) - [Clamping](https://www.applied.com/c/1286) - [Clips & Pins](https://www.applied.com/c/1598) - [Communication Equipment](https://www.applied.com/c/420) - [Electrical Products](https://www.applied.com/c/4255) - [Fans & Blowers](https://www.applied.com/c/4320) - [Guard Rail Systems](https://www.applied.com/c/4702) - [Heating Equipment](https://www.applied.com/c/4321) - [HVAC Filters](https://www.applied.com/c/309) - [Keys](https://www.applied.com/c/427) - [Keystock](https://www.applied.com/c/1624) - [Ladders & Scaffolding](https://www.applied.com/c/910) - [Lighting Products](https://www.applied.com/c/121) - [Nuts & Bolts](https://www.applied.com/c/2930) - [O-Ring Kits](https://www.applied.com/c/4237) - [Pipe Fittings & Accessories](https://www.applied.com/c/3662) - [Portable Cooling Units](https://www.applied.com/c/111) - [Retaining Rings](https://www.applied.com/c/1773) - [Rods, Plates & Wire](https://www.applied.com/c/387) - [Screws & Anchors](https://www.applied.com/c/430) - [Shaft Collars](https://www.applied.com/c/32) - [Shims](https://www.applied.com/c/10) - [Strapping](https://www.applied.com/c/424) - [Tape & Dispensers](https://www.applied.com/c/3653) - [Thread Inserts](https://www.applied.com/c/2863) - Hose & Fluid Connectors - [Hose & Fluid Connectors](https://www.applied.com/c/466) - [Accessories](https://www.applied.com/c/471) - [Automotive Fittings](https://www.applied.com/c/3080) - [Cam & Groove Fittings & Accessories](https://www.applied.com/c/2816) - [Clamps](https://www.applied.com/c/473) - [Couplings](https://www.applied.com/c/2847) - [Garden Hose & Washdown](https://www.applied.com/c/4187) - [Hydraulic Connectors](https://www.applied.com/c/1269) - [Hydraulic Hose](https://www.applied.com/c/3481) - [Industrial Fittings](https://www.applied.com/c/467) - [Industrial Hose](https://www.applied.com/c/1200) - [Pipe, Hose & Tube Clamps](https://www.applied.com/c/469) - [Quick Disconnect Couplers](https://www.applied.com/c/2171) - [Sanitary Products](https://www.applied.com/c/3628) - [Tools & Kits](https://www.applied.com/c/2964) - Hydraulic Products - [Hydraulic Products](https://www.applied.com/c/546) - [Accumulators](https://www.applied.com/c/1107) - [Cartridge Valves & Accessories](https://www.applied.com/c/214) - [Directional Controls](https://www.applied.com/c/2065) - [Flow/Motion Control](https://www.applied.com/c/1318) - [Heat Exchangers](https://www.applied.com/c/1112) - [Hydraulic Accessories](https://www.applied.com/c/3681) - [Hydraulic Ball Valves & Accessories](https://www.applied.com/c/3162) - [Hydraulic Cylinders](https://www.applied.com/c/477) - [Hydraulic Motors & Transmissions](https://www.applied.com/c/485) - [Hydraulic Power Units](https://www.applied.com/c/486) - [Hydraulic Pumps](https://www.applied.com/c/487) - [Manifolds & Subplates](https://www.applied.com/c/2180) - [Pressure Control](https://www.applied.com/c/1319) - [Proportional Directional Control Valves](https://www.applied.com/c/540) - [SystemStak™ Valves](https://www.applied.com/c/2898) - Industrial Chemicals - [Industrial Chemicals](https://www.applied.com/c/396) - [Adhesive Equipment](https://www.applied.com/c/1328) - [Adhesive Kits](https://www.applied.com/c/2720) - [Adhesives](https://www.applied.com/c/243) - [Cleaning Chemicals](https://www.applied.com/c/3483) - [Epoxies](https://www.applied.com/c/394) - [Gasketing](https://www.applied.com/c/2356) - [Sealants](https://www.applied.com/c/1261) - Janitorial Products - [Janitorial Products](https://www.applied.com/c/5488) - [Bags & Can Liners](https://www.applied.com/c/5489) - [Brooms, Brushes & Dusters](https://www.applied.com/c/4338) - [Cleaning Chemicals](https://www.applied.com/c/5490) - [Floor Machine Pads](https://www.applied.com/c/5556) - [Floor Machines & Vacuums](https://www.applied.com/c/5555) - [Food Service](https://www.applied.com/c/1929) - [Ice Melt](https://www.applied.com/c/3297) - [Laundry Hampers & Bags](https://www.applied.com/c/5882) - [Mops, Buckets & Squeegees](https://www.applied.com/c/4341) - [Odor Control](https://www.applied.com/c/5497) - [Paper & Dispensers](https://www.applied.com/c/5498) - [Personal Care Products](https://www.applied.com/c/375) - [Reusable Rags & Cloths](https://www.applied.com/c/5175) - [Sponges & Scrubbers](https://www.applied.com/c/596) - [Sprayers & Pumps](https://www.applied.com/c/634) - [Trash Cans & Waste Receptacles](https://www.applied.com/c/5501) - Linear Motion - [Linear Motion](https://www.applied.com/c/512) - [Actuators & Worm Gear Jacks](https://www.applied.com/c/513) - [Ball Screws, Acme Screws & Splines](https://www.applied.com/c/1509) - [Linear Motion Carriage & Rail Accessories](https://www.applied.com/c/515) - [Profile Rail Products](https://www.applied.com/c/297) - [Round Rail Products](https://www.applied.com/c/296) - [Square Rail Products](https://www.applied.com/c/1236) - [Track Roller Systems](https://www.applied.com/c/1744) - [U-Channel Rail System](https://www.applied.com/c/3459) - Lubrication Products & Equipment - [Lubrication Products & Equipment](https://www.applied.com/c/521) - [Fluids & Oils](https://www.applied.com/c/664) - [Greases](https://www.applied.com/c/1238) - [Lubricants & Compounds](https://www.applied.com/c/368) - [Lubrication Equipment](https://www.applied.com/c/525) - [Paste](https://www.applied.com/c/522) - Material Handling - [Material Handling](https://www.applied.com/c/1501) - [Belt Splicing Kits & Accessories](https://www.applied.com/c/207) - [Bumpers](https://www.applied.com/c/11) - [Chain, Cable, Rope & Accessories](https://www.applied.com/c/4403) - [Conveyor Components](https://www.applied.com/c/823) - [Elevator Bucket Conveyor Components](https://www.applied.com/c/200) - [Farm Products & Accessories](https://www.applied.com/c/3701) - [Guide Rails & Hardware](https://www.applied.com/c/2937) - [Lifting Tools](https://www.applied.com/c/4404) - [Machine & Equipment Components](https://www.applied.com/c/2939) - [Rollers](https://www.applied.com/c/4407) - [Screw Conveyor Components](https://www.applied.com/c/539) - [Tensioners, Tighteners & Idlers](https://www.applied.com/c/819) - [Wear Strips](https://www.applied.com/c/2938) - Paints & Coatings - [Paints & Coatings](https://www.applied.com/c/63) - [Coatings](https://www.applied.com/c/547) - [Markers](https://www.applied.com/c/2713) - [Painting & Spraying Equipment](https://www.applied.com/c/562) - [Paints](https://www.applied.com/c/256) - Pneumatic Products - [Pneumatic Products](https://www.applied.com/c/3679) - [Air Compressors & Accessories](https://www.applied.com/c/110) - [Air Motors & Accessories](https://www.applied.com/c/3347) - [Directional Controls](https://www.applied.com/c/217) - [Dryers, Separators & Drains](https://www.applied.com/c/9) - [Filters,Regulators & Lubricators](https://www.applied.com/c/1198) - [Flow Controls & Pressure Regulators](https://www.applied.com/c/143) - [Mufflers & Silencers](https://www.applied.com/c/138) - [Other Airline Products](https://www.applied.com/c/1755) - [Pneumatic Connectors & Accessories](https://www.applied.com/c/700) - [Pneumatic Cylinders](https://www.applied.com/c/499) - [Pneumatic Filtration](https://www.applied.com/c/146) - [Pneumatic Oils](https://www.applied.com/c/509) - [Rotary Actuators](https://www.applied.com/c/768) - [Shock Absorbers](https://www.applied.com/c/2067) - [Specialty Valves](https://www.applied.com/c/1934) - [Vacuum Products](https://www.applied.com/c/3267) - Power Transmission - [Power Transmission](https://www.applied.com/c/582) - [Bulk V-Belting](https://www.applied.com/c/173) - [Bushings](https://www.applied.com/c/235) - [Chain](https://www.applied.com/c/606) - [Electric Clutches & Brakes](https://www.applied.com/c/1759) - [Flat Belts](https://www.applied.com/c/5167) - [Keyless Bushings](https://www.applied.com/c/1907) - [Mechanical (Manual) Clutches](https://www.applied.com/c/611) - [Overload Clutches & Accessories](https://www.applied.com/c/265) - [Pneumatic Clutches & Brakes](https://www.applied.com/c/612) - [Sensors](https://www.applied.com/c/2909) - [Shafting](https://www.applied.com/c/2085) - [Shear Pin Hubs & Accessories](https://www.applied.com/c/295) - [Sheaves & Pulleys](https://www.applied.com/c/586) - [Specialty Belts](https://www.applied.com/c/8) - [Sprockets](https://www.applied.com/c/67) - [Synchronous (Timing) Belts](https://www.applied.com/c/588) - [Torque Limiters & Accessories](https://www.applied.com/c/2137) - [V-Belt Tension Testers](https://www.applied.com/c/5165) - [V-Belts](https://www.applied.com/c/601) - [Variable Speed Belts](https://www.applied.com/c/605) - Process Equipment - [Process Equipment](https://www.applied.com/c/12) - [Duct Hose](https://www.applied.com/c/3479) - [Hose Reels](https://www.applied.com/c/1054) - [Industrial Valves](https://www.applied.com/c/2676) - [Instrumentation](https://www.applied.com/c/2567) - [Process Pumps](https://www.applied.com/c/5941) - [Rotary Unions](https://www.applied.com/c/118) - Safety Products - [Safety Products](https://www.applied.com/c/633) - [Cooling Products](https://www.applied.com/c/2258) - [Eye Protection](https://www.applied.com/c/4704) - [Fall Protection](https://www.applied.com/c/4705) - [Fire, Gas & Water Protection](https://www.applied.com/c/4706) - [First Aid Products](https://www.applied.com/c/4707) - [Floor Matting](https://www.applied.com/c/2331) - [Foot Protection](https://www.applied.com/c/4708) - [Hand & Arm Protection](https://www.applied.com/c/4709) - [Head & Face Protection](https://www.applied.com/c/4710) - [Hearing Protection](https://www.applied.com/c/1487) - [Locking Devices](https://www.applied.com/c/3170) - [Pads & Supports](https://www.applied.com/c/4703) - [Protective Clothing](https://www.applied.com/c/4699) - [Respiratory Protection](https://www.applied.com/c/635) - [Safety Lights ](https://www.applied.com/c/3847) - [Safety Storage](https://www.applied.com/c/4714) - [Signs, Tags & Tape](https://www.applied.com/c/1719) - [Spill Control Products](https://www.applied.com/c/2341) - [Warming Products](https://www.applied.com/c/2196) - Seals, O-Rings & Sleeves - [Seals](https://www.applied.com/c/446) - [Accessories](https://www.applied.com/c/1986) - [Bearing Isolators](https://www.applied.com/c/447) - [Face Seals](https://www.applied.com/c/1840) - [Hydraulic Seals](https://www.applied.com/c/1854) - [Labyrinth Seals](https://www.applied.com/c/848) - [O-Rings](https://www.applied.com/c/453) - [Pump Seals](https://www.applied.com/c/233) - [Shaft Seal Kits - Seal & Gasket](https://www.applied.com/c/278) - [Shaft Seal Kits - Seal & Sleeve](https://www.applied.com/c/737) - [Shaft Seals](https://www.applied.com/search?override=true&remove=true&q=%3Arelevance%3Acategory%3A3256) - [Wear Sleeves](https://www.applied.com/c/455) - Speed Reducers & Gearing - [Speed Reducers & Gearing](https://www.applied.com/c/618) - [Bevel Gear Reducers](https://www.applied.com/c/344) - [Gearmotors](https://www.applied.com/c/236) - [Helical](https://www.applied.com/c/196) - [Hyponic Reducers](https://www.applied.com/c/1273) - [Inline](https://www.applied.com/c/188) - [Open Gears](https://www.applied.com/c/623) - [Output Shafts](https://www.applied.com/c/3388) - [Overhung Load Adaptors](https://www.applied.com/c/4203) - [Parallel Shaft](https://www.applied.com/c/208) - [Reducer Accessories](https://www.applied.com/c/234) - [Screw Conveyor](https://www.applied.com/c/231) - [Shaft Mount](https://www.applied.com/c/184) - [Sleeves](https://www.applied.com/c/753) - [Tapered Gear Reducer Bushings](https://www.applied.com/c/708) - [Worm Gear Reducers](https://www.applied.com/c/232) - Tools - [Tools](https://www.applied.com/c/661) - [Abrasives](https://www.applied.com/c/77) - [Analytical Tools](https://www.applied.com/c/637) - [Automotive Tools](https://www.applied.com/c/3126) - [Balances & Scales](https://www.applied.com/c/272) - [Bearing Tools](https://www.applied.com/c/667) - [Cutting Tools](https://www.applied.com/c/127) - [Hand Tools](https://www.applied.com/c/681) - [Hydraulic Tools & Equipment](https://www.applied.com/c/1505) - [Plumbing Equipment](https://www.applied.com/c/4853) - [Pneumatic Tools](https://www.applied.com/c/304) - [Power Tools](https://www.applied.com/c/712) - [Tool Storage](https://www.applied.com/c/722) - [Welding Supplies](https://www.applied.com/c/4597) - Brands - [Brands](https://www.applied.com/c/Brand-0) - [ABB](https://www.applied.com/c/Brand-231) - [Baldor-Reliance](https://www.applied.com/c/Brand-153) - [Climax](https://www.applied.com/brands/climax-metal/c/Brand-363) - [Continental](https://www.applied.com/c/Brand-54) - [Dodge](https://www.applied.com/c/Brand-481) - [Donaldson](https://www.applied.com/brands/donaldson/c/Brand-483) - [Danfoss](https://www.applied.com/brands/danfoss-fluid-power/c/Brand-443) - [Enerpac](https://www.applied.com/brands/enerpac/c/Brand-555) - [Garlock](https://www.applied.com/c/Brand-662) - [GoldSpec®](https://www.applied.com/brands/goldspec-/c/Brand-701) - [Graco](https://www.applied.com/brands/graco/c/Brand-705) - [Henkel Loctite](https://www.applied.com/c/Brand-979) - [Lubriplate](https://www.applied.com/c/Brand-996) - [Martin](https://www.applied.com/c/Brand-1041) - [Milwaukee](https://www.applied.com/brands/milwaukee-tool/c/Brand-1122) - [PIP](https://www.applied.com/brands/pip/c/Brand-2067) - [Precision Pulley & Idler](https://www.applied.com/c/Brand-1376) - [Regal Rexnord](https://www.applied.com/c/Brand-1813) - [Renold Jeffrey Chain](https://www.applied.com/c/Brand-2388) - [Rexnord](https://www.applied.com/c/Brand-244) - [Schaeffler](https://www.applied.com/c/Brand-232) - [SKF Corp](https://www.applied.com/c/Brand-261) - [Simplex](https://www.applied.com/brands/simplex/c/Brand-237) - [Symmco Inc.](https://www.applied.com/brands/symmco-inc-/c/Brand-1679) - 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This practical guide helps aggregate operations prepare for failures across crushers, conveyors, and screens without maintaining on site inventory. [Download the Critical Spares Checklist](https://content.applied.com/hubfs/Applied%20Technologies-Aggregate%20Critical%20Spares%20Checklist-v5-WEB.pdf?hsLang=en)   Get Your Free Critical Spares Checklist [Download Now](https://content.applied.com/hubfs/Applied%20Technologies-Aggregate%20Critical%20Spares%20Checklist-v5-WEB.pdf?hsLang=en) [ ![Screenshot 2026-04-30 121519](https://content.applied.com/hs-fs/hubfs/Screenshot%202026-04-30%20121519.png?width=520&height=673&name=Screenshot%202026-04-30%20121519.png) ](https://content.applied.com/hubfs/Applied%20Technologies-Aggregate%20Critical%20Spares%20Checklist-v5-WEB.pdf?hsLang=en) ## WHAT YOU WILL GET - Critical spares guidance for crushers, conveyors, and screens - A prioritization framework based on risk, lead time, and availability - Planning strategies to reduce downtime and expedite costs - Insight into technology and monitoring options that extend component life - A practical checklist to support maintenance and reliability planning Ready to improve your maintenance planning? [Get the Checklist](https://content.applied.com/hubfs/Applied%20Technologies-Aggregate%20Critical%20Spares%20Checklist-v5-WEB.pdf?hsLang=en) ## WHY CRITICAL SPARES PLANNING MAKES A DIFFERENCE In aggregate operations, downtime is often driven by how well teams understand risk, lead times, and failure likelihood across critical systems. Knowing what makes a part critical, how long it takes to replace, and where vulnerabilities exist can make all the difference for highly productive operations. Plants that plan critical spares ahead of time are better positioned to respond quickly, minimize disruption, and maintain consistent production. This guide was built from real world aggregate environments to support proactive planning and smarter decision making. 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