QUALITY DURABILITY -- Made of high-quality lubricated 608ZZ ABEC-5 steel. OPTIMAL PERFORMANCE -- Features dual shields for optimum lubrication and reduction of contaminants. MATERIAL OPTIONS -- Available in carbon or chrome steel. Versatile inline, roller blade, rollerskate, skateboard, eletric skateboard, RipStik more.. QUALITY GUARANTEE -- We provide only high-quality bearings. If you are not fully satisfied for any reason, just contact us by Amazon messaging within 30 days..

SMOOTH, PRECISE ROTATION - Engineered to fit roller skates, roller blades, inline skates, scooters, and skateboards, these 608-2RS bearings ensure a steady, efficient ride without compromise. Available in ABEC-5 chrome steel and ABEC-1 carbon steel options.. PRE-LUBRICATED FOR EASY USE - These roller blade bearings come factory-lubricated and ready to perform straight out of the box. Features removable rubber seals to protect against dirt and debris. Easy to clean and maintain for long-term reliability.. DURABLE QUIET OPERATION - Premium materials reduce vibration and noise. A great choice for casual riders, commuters, and hobbyists alike.. UNIVERSAL COMPATIBILITY - Fits all standard equipment use with typical 8mm axles. These skate wheel bearings install smoothly into wheels, providing excellent fit and performance.. BUILT FOR LONGEVITY - Made from high-quality steel, these rollerex bearings are built to endure daily use while delivering consistent performance. Comes with 20 pre-lubricated 608rs bearingsenough for a full set of wheels with spares included..

P5-grade zirconia oxidation ceramic balls for high strength and wear resistance. Non-contact removable rubber shields for easy cleaning and reduced friction. High-strength, lightweight nylon ball retainers for superior performance. Rust-resistant lubricating oil for added protection. C3 clearance with P5-grade tolerance and lubricant for optimal performance.

SMOOTH, PRECISE ROTATION - Engineered to fit roller skates, roller blades, inline skates, scooters, and skateboards, these 608-2RS bearings ensure a steady, efficient ride without compromise. Factory pre-lubricated and ready straight out of the box.. ABEC-7 CHROME STEEL Highly precise and stronger than typical carbon skate bearings, these guys dont disappoint.. DUAL SHIELD PROTECTION - Built with dual rubber shields to guard against dust and debris, ensuring long-term reliability and reduced wear.. UNIVERSAL COMPATIBILITY - Fits all standard equipment use with typical 8mm axles. These roller blade bearings install smoothly into wheels, providing excellent fit and performance.. KIT OPTIONS Choose from a kit meant for 4 wheels 8 roller skate bearings, 4 spacers, 8 washers and the other meant for 8 wheels 16 roller skate bearings, 8 spacers, 16 washers. Note that washers are optional in skate use and typically only used on very old pairs or in non-skate activity..

Yarlung 20 pack 1 inch Roller Ball Transfer Bearings, widely applied in conveyor line installing, processing system, transmission system.. Made of high quality carbon steel, high corrosion resistance and wear resistance, noiseless, increasing the service life.. 360 Degree Rotation Smooth movement with labor saving, enhances right directional operations when transferring goods over different directions.. Each ball transfer roller unit with a load capacity of 66 lbs, suitable for for transmission furniture, wooden boxes, workbenches, home appliances.. 2 holes on both sides of the base mounting bracket for quick and easy installation on most light furniture, such as shelves, chairs, tables, cabinets, desks and more..

Confirm R8-2RS dimensions before ordering - This listing includes R8-2RS ball bearings measuring 12 inch inner diameter, 1-18 inch outer diameter and 516 inch width. Check the marking and all three measurements on your existing bearing before purchase.. Exact replacement size matters - Approximate metric dimensions are 12.7 mm ID x 28.58 mm OD x 7.94 mm width. Select this bearing only when the required dimensions match.. 10 bearings included - The package contains 10 R8-2RS ball bearings in one consistent size for replacement tasks requiring this specified bearing model and dimensions.. Double rubber sealed configuration - Each bearing is supplied in the R8-2RS double rubber sealed configuration for buyers requiring this bearing type.. Pre-lubricated chrome steel construction - Made from chrome steel and supplied pre-lubricated for compatible replacement tasks requiring the stated R8-2RS specifications..

Quality Material our ball casters are crafted from carbon steel, offering impressive durability and resistance to wear and tear The smooth silver finish not only enhances their aesthetic appeal but also adds a protective layer, making they resistant to rust and corrosion, thereby ensuring a prolonged lifespan. Ideal Size for Versatility with a dimension of approximately 1.97 x 1.22 x 0.79 inches 50 x 31 x 20 mm, and a steel ball size of about 58 inches, these items strike the ideal balance between size and functionality Whether your project is big or small, our roller bearing ensures smooth and effortless movement. Robust Load Capacity despite their compact size, these ball casters punch above their weight with an impressive load rating of about 55 lbs. They demonstrate unmatched strength and durability when moving heavy items, ensuring efficient service without compromising the integrity or safety of your items. Generous Quantity the package includes 100 small casters, whether you're a DIY enthusiast working on a project or a professional in need of quality casters, our product decreases the need for frequent replacements. 360 Degree Rotation these rollers for furniture provide 360 degree maneuverability, providing ideal handling and impressive flexibility Whether along the confusing corridors or in constricted spaces, they offer effortless guidance, reducing operational effort, and time.

SMOOTH, PRECISE ROTATION - Engineered to fit roller skates, roller blades, inline skates, scooters, and skateboards, these 608-2RS bearings ensure a steady, efficient ride without compromise. Available in ABEC-5 chrome steel and ABEC-1 carbon steel options.. PRE-LUBRICATED FOR EASY USE - These roller skate bearings come factory-lubricated and ready to perform straight out of the box.. DUAL SHIELD PROTECTION - Built with dual metal shields to guard against dust and debris, ensuring long-term reliability and reduced wear.. UNIVERSAL COMPATIBILITY - Fits all standard equipment use with typical 8mm axles. These inline skate bearings install smoothly into wheels, providing excellent fit and performance.. BUILT FOR LONGEVITY - Made from high-quality steel, these wheel bearings are built to endure daily use while delivering consistent performance. Comes with 20 pre-lubricated Rollerex bearingsenough for a full set of wheels with spares included..

Model RC081208 I.D. Fw 12inch, O.D. D 34inch, Width C 12inch. ST14 steel drawn cup, GCr15 needle rollers one way clutch. Good heat tolerance, high load carrying capacity and stiffness. Low cross section, enable downsizing and suit for use in restricted mounting spaces. Pre-Lubricated. Good running properties.

Include8pcs 608-2RS ball bearings, rubber sealed deep groove 608 RS ball bearings. Dimensions - 8mm x 22mm x 7mm 608-2RS. High durability The rubber seals protect the bearing, increasing their durability and longevity.. With shields This 608-2RS bearings with rubber sealed Shields on both sides keeping lubricant in andcontaminants out.. Wide Application 608RS Ball bearings for skateboards wheels, inline skates, scooters, Longboards, Roller Skatesor other skating applications etc.

SizeSCE1412 needle roller bearing have I.D. of 78 Inch 22.225mm O.D. 1 18 Inch 28.575mm Width 34 Inch 19.05mm Limiting Speed 11400 Rpm, package include 5 pcs bearings. MaterialThe needles and drawn cup of stiffness bearing made of high quality bearing steel, featuring exceptional hardness and wear resistance The cage adopts TN engineering plastic, with lightweight, heat resistant and good toughness. FeatureThis industrial bearings designed for high-speed rotation with low friction and low noise, effectively improving work efficiency and reducing operational noise pollution, the structure is compact, ensures high load carrying capacity and stiffness. InstallationThe needle roller thrust bearings adopts open ends design for easy installation and maintenance but notice that install with a press machine or special tools instead of hammers, otherwise may lead to local deformation of the bearing, affecting its precision and service life. ApplicationNeedle bearings very suitable for gearboxes, pumps, compressors, washing machine and air conditioner transmission systems, spin mop buckets and DIY mechanical projects widely used in small machinery and household appliances.

SizeRC121610 needle roller bearing have I.D. of 34 Inch 19.05mm O.D. 1 Inch 25.4mm Width 58 Inch 15.88mm Limiting Speed 11300 Rpm, package include 5 pcs bearings. MaterialThe needles and drawn cup of stiffness bearing made of high quality bearing steel, featuring exceptional hardness and wear resistance The cage adopts TN engineering plastic, with lightweight, heat resistant and good toughness. FeatureThis industrial bearings designed for high-speed rotation with low friction and low noise, effectively improving work efficiency and reducing operational noise pollution, the structure is compact, ensures high load carrying capacity and stiffness. InstallationThe needle roller thrust bearings adopts open ends design for easy installation and maintenance but notice that install with a press machine or special tools instead of hammers, otherwise may lead to local deformation of the bearing, affecting its precision and service life. ApplicationNeedle bearings very suitable for gearboxes, pumps, compressors, washing machine and air conditioner transmission systems, spin mop buckets and DIY mechanical projects widely used in small machinery and household appliances.

SizeRCB061014 needle roller bearing have I.D. of 38 Inch 9.52mm O.D. 58 Inch 15.88mm Width 78 Inch 22.22mm Limiting Speed 25300 Rpm, package include 2 pcs bearings. MaterialThe needles and drawn cup of stiffness bearing made of high quality bearing steel, featuring exceptional hardness and wear resistance The cage adopts TN engineering plastic, with lightweight, heat resistant and good toughness. FeatureThis industrial bearings designed for high-speed rotation with low friction and low noise, effectively improving work efficiency and reducing operational noise pollution, the structure is compact, ensures high load carrying capacity and stiffness. InstallationThe needle roller thrust bearings adopts open ends design for easy installation and maintenance but notice that install with a press machine or special tools instead of hammers, otherwise may lead to local deformation of the bearing, affecting its precision and service life. ApplicationNeedle bearings very suitable for gearboxes, pumps, compressors, washing machine and air conditioner transmission systems, spin mop buckets and DIY mechanical projects widely used in small machinery and household appliances.

Letool 4pcs U type groove pulley nylon Guide Pulley Rolling Bearing U Groove Roller Wheel 8x40x20mm for Driving Mechanical Equipment, or Used in Doors and Windows. U-GROOVE SIZEInner Diameter 8mm0.3in, Outer Diameter 40mm1.6in, Thickness 20.7mm0.8in.. OPERATION ADVANTAGES Stable and smooth operation, good mute effect, practical and durable.. WIDELY USEDWidely used in doors and windows to track and drive mechanical equipments. These gadgets can be used to build the track system or replace the wheels on the dolly.. Max Load-bearing the wheels are very strong and the bearing capacity is stronger.Max Load-bearing is 167kg368lbs.

16 Pack of 8mm Bearings - Enough for One Pair of Skates. Lubricated with Low Viscosity Bones Speed Cream. Skate Rated clearances, tolerances, materials and lubricant provide the best performance and durability possible. Removable High Speed Nylon Ball Cages. Fast, Long Lasting, Easy to Clean.

SIZE - Model SCE610 I.D. Fw 38, O.D. D 916, Width C 58. MATERIAL - Steel Drawn Cup, Steel Cage, Chrome Steel Needle Rollers. FEATURES - The outer ring of needle roller bearing is formed by precision stamping of thin steel plate, the structural space is small, and has a large load capacity. CAPABILITY - Dynamic Load Rating 7400N, Static Load Rating 9100N, Limit Speed 25000RPM. APPLICATIONS - They are suitable for applications where the installation space is restricted and the housing bore can be used as a raceway.

Deep groove ball bearings, fashionable, slide flexible, compression wear.. Suitable for furniture hardware accessories, mobile doors, glass sliding doors, aluminum doors and w. It is made of high-quality nylon and plastic, with high durability, long service life, and can reduce vibration and noise.. This u groove pulley is widely used in doors and windows to track and drive mechanical equipment. There are total 5 pieces of pulleys in one set that you many use for many projects.. Product Size 8mmID30mmOD10mmThickness,U groove Size 6mmWidth3mmDepth324mmdiameter.

Model SCE108 I.D. Fw 58, O.D. D 1316, Width C 12. ST14 Steel Drawn Cup, ST13 Steel Cage, GCr15 Needle Rollers. Good heat tolerance, high load carrying capacity and stiffness. Low cross section, enable downsizing and suit for use in restricted mounting spaces. Pre-Lubricated. Good running properties.

608ZZ I.D.8mm, O.D.30mm, Thickness10mm. 608ZZ bearings are shielded on both sides to keep lubricant in. Chromium Steel long-life bearings, smooth and low noise. ABEC Tolerance 1 P0, Z2 Noise Level for most general use. Suitable for all kinds of industrial equipment, micro motor, small rotary motor, office equipment and so on.

1. High hardness and toughness Bearing steel is a high-quality steel that is specifically designed for bearing applications. It is characterized by its high hardness and toughness, which makes it an excellent choice for applications that require high load-bearing capacity and durability.. 2, The features and advantages of bearing steel 608 bearings make them an excellent choice for small machinery applications that require high load-bearing capacity, durability, and precision. Bearing steel 608 bearings are a type of deep groove ball bearing that are made of high-quality bearing steel. These bearings are commonly used in skateboard wheels, inline skates, and other small machinery.. 3. High precision Bearing steel 608 bearings are manufactured to very high precision standards, ensuring that they are able to provide smooth and efficient operation even under high loads.. 4. Versatility These bearings are widely used in a variety of small machinery applications, including skateboard wheels, inline skates, and electric motors.. 5. Low friction The low friction coefficient of bearing steel 608 bearings allows them to spin with minimal resistance, reducing energy loss and extending their lifespan..

High hardness and toughness Bearing steel is a high-quality steel that is specifically designed for bearing applications. It is characterized by its high hardness and toughness, which makes it an excellent choice for applications that require high load-bearing capacity and durability.. DesignThis high-performance bearing features inner and outer races machined from hardened stainless steel and polished balls made of premium chrome steel for incredibly smooth, reliable operation even under extreme loads.. Versatility These bearings are widely used in a variety of small machinery applications, including skateboard wheels, inline skates, and electric motors.. Easy Installation The compact integrated corrosion resistant stainless steel construction allows for quick press fit installation into tight spaces without the need for fastening hardware or bonding agents.. Superb Performance The meticulous hand-finishing and quality craftsmanship provide virtually frictionless, vibration-free and whisper-quiet spinning, making this bearing the smart choice for the most critical industrial equipment where failure is never an acceptable option..

MODLE - Bearing Model AXK2035 I.D.20mm, O.D.35mm, Thickness2mm, Thickness with Washers 4mm Washer Model AS2035. MATERIAL - Chromium steel rollers for heat tolerance and durability under heavy loads Steel cage guides and evenly spaced rollers for reduced friction, vibration, and noise. FEATURES - Needle Roller Thrust Bearings can accommodate axial loads in one direction only. WASHER - Combined with 2 washers for applications where adjacent machine components cannot serve as raceways. CAPABILITY - 45.6kN Static Load Capacity, 12.9kN Dynamic Load Capacity, 8500RPM Maximum Rotational Speed.

MODEL - Bearing Model AXK150190 I.D.150mm, O.D.190mm, Thickness7mm Washer Model AS150190. MATERIAL - Chromium steel rollers for heat tolerance and durability under heavy loads Steel cage and evenly spaced precision-ground needle rollers for reduced friction, vibration, and noise. WASHER - Combined with 2 washers for applications where adjacent machine components cannot serve as raceways. CAPABILITY - Static Load Capacity 143kN, Dynamic Load Capacity 960kN, Maximum Rotational Speed 1700RPM. APPLICATION - Rolling bearings are used in a range of applications from agricultural machinery to conveying equipment, robotics, elevators, rolling mills, ship rudder shafts, etc..

Cone inner ring assembly and cup outer ring combine to form a complete single tapered roller bearing. Supports both radial and axial loads between a rotating and non-rotating member. Operating temperatures range from -54 to 120 degrees C -65 to 250 degrees F. Stamped steel cage evenly spaces rollers for reduced friction, vibration, and noise. Open configuration for lubrication applied in place.

ABEC 9 RATING Every bearing in the Better Bearings range is now an ABEC 9 classification. Rock Solids are an affordable choice for long term use. ABEC ratings are an industry standard with the higher the number the more speed it gives skaters. Better Bearings choose highly rated bearings for the level of attention and quality that is received during the design and manufacturing.. BREAKING BAD Better Bearings are pre-spun during the quality testing phase at the factory, however like all bearings, they're not going to spin fast and free right out of the packaging, because they're packed pre-lubed to protect them while waiting for you to give them a new home.. SPACERS AND SIDELOADING Sideloading is when all the pressure is put on one side of the bearings, which slightly changes where the ball bearings and the race surface touch and the axis of the bearing. Better Bearings only use the hardest wearing materials in order to deal with this issue. Using spacers can help the structural integrity of the setup, however, there were no issues in testing them without spacers.. TWICE INSPECTED SKATERS TESTED Better Bearings are inspected twice. Once before the bearings leave the factory and once the package are handed over. Pro Skaters were asked to the test the bearings, by skating them and treating them like riders usually do. The test team comes from all over Australia. They train on nice floors, dirty floors and outdoors. They went to the skate park, rolled through beer and glitter and played a lot.. ENVIRONMENT FRIENDLY PRODUCTION CHARITY The bearing packaging and tough nuts box is made from 100 recycled paper and is biodegradable and the cleaning products are environmentally safe. The bearing packing is made from recyclable cardboard, the order packaging for wholesale is repurposed boxes and packaging. The bearing wash is drain friendly. Brand also is highly conscious about giving back, where in a percentage of the proceeds from sales goes to UN Women Australia..

QUALITY DURABILITY - Made of high-quality lubricated 608-2RS steel. OPTIMAL PERFORMANCE - Features removable dual shields for optimum lubrication and reduction of contaminants. ALL SKATE TYPES - Built for any type of skating inline, roller blade, rollerskate, skateboard, electric skateboard, RipStik and more. MATERIAL OPTIONS - Available in carbon ABEC-1 or chrome steel ABEC-5. QUALITY ASSURED - We provide only high-quality bearings. If you are not fully satisfied for any reason, just contact us by Amazon messaging within 30 days..

Easily adapts to various mechanical operations, making equipment rotation smoother and daily use less troublesome.. Handles continuous operation needs with ease, helping equipment maintain good performance for a long time.. Installation and use are not complicated. It fits multiple scenarios, adding reliability to mechanical operation.. Reduces unnecessary shaking during operation, making equipment operation smoother and improving work efficiency.. Quietly supports stable equipment operation, capable of handling both industrial scenarios and mechanical devices..

Heavy Duty Material the one way bearing is made of ST14 steel, durable and good heat tolerance, high load carrying capacity and stiffness.. High Speed Rotation needle roller bearing has uniform hardness, low friction, low noise, speed up work and production efficiency.. Product Size I.D. 8mm, O.D. 14mm, Width 12mm. Applications the one way bearing is suitable restricted mounting spaces, widely apply on machinery, machine tool, pumps and compressors, gearing, o-cedar spin mop bucket.. What you get you will get 4 pieces one way bearing 8mm, enough for you use..

For use with 1.968 inches 49.99 mm hub bore, Outer Bearing Cone M - 12649, 07100, Outer Bearing Cup race M-12610, 07196, weight 1.00 lbs. Prevents wheel bearing failure on boat, snowmobile, ATV, horse, RV and utility trailers. Grease level is shown with Auto Check feature - Eliminates bearing repacking. Keeps water and dirt out of hubs and bearings - Stainless steel components. Please see measurement instructions secondary picture to confirm correct sizing.

Material Ball Transfer made of carbon steel to provide corrosion resistance, strong and sturdy, good wear resistance and not easy to wear out.. Craft The ball transfer table support cup is hardened and plated. Size CY-15H 58 inch diameter ball bearing roller. 360 Degrees 360 degrees universal transfer bearings, load rating is 44 pounds. Application Widely used in transmission system, feeding system, processing system, processing machinery.

Ball bearings assortment kit includes 12pcs 3mm x 8mm x 4mm 12pcs 3mm x 10mm x 4mm 12pcs 4mm x 13mm x 5mm 12pcs 5mm x 11mm x 5mm 10pcs 7mm x 14mm x 5mm 10pcs7mm x 22mm x 7mm. 693ZZ 623ZZ 624ZZ 685ZZ 687ZZ 627ZZ 6 sizes bearing steel deep groove ball bearings can meet your different installation needs, which is convenient for storage, use and carrying. Wide applications deep-groove ball bearings are widely used in a variety of small machinery,including Electric Toys, Furniture wheels, skateboard wheels, inline skates and 3d printing. Material high speed silent small bearing kit is made of high quality carbon steel. Miniature carbon steel bearings have the characteristics of high speed operation, low noise Z2, high temperature resistance and smooth rotation. Pre-LubricatedIn order to let small bearing with prolong the service life of the product and ensuring smooth operation and reducing the need for frequent maintenance.

Precision Engineering for Peak Performance Elevate your skating with Bont's Pro Racing Bearings, designed for serious skaters. Enjoy enhanced speed and smoother rides with our advanced 7-ball design. Dual Shield Durability Experience long-lasting use with our innovative dual shield technology, featuring a robust rubber and high-strength nylon shield to protect against dirt and debris. Universal Fit - 608 Standard Size Ideal for most inline and roller skates, these bearings are versatile and user-friendly, ensuring you're ready to skate in no time. Easy Maintenance Design Save time and effort with our removable shields, making cleaning and lubrication a breeze. Keep your bearings in top condition effortlessly. High-Quality German Racing Oil Benefit from consistent, smooth performance with our premium German-made racing oil, ensuring your bearings roll smoothly under any condition. Trusted by Professionals Join the ranks of champion skaters who trust Bont Pro Racing Bearings for their reliability and exceptional performance. Convenient 16-Pack Get a complete set of 16 bearings, ensuring you have a full replacement set ready, enhancing your skating experience without any downtime.

BEARING SPECIFICATION Precision 608 skate bearings rated to ABEC 9 tolerance, designed for consistent rolling performance across multiple skating disciplines.. PRE-LUBRICATED Supplied pre-lubricated with a light racing oil to reduce rolling resistance and allow immediate use without additional preparation.. SHIELDING Double metal shields help limit dust and debris ingress, supporting longer service life and consistent performance.. DIMENSIONS AND FIT Standard 608 bearing dimensions 8 22 7 mm. Designed to fit 8 mm axles used on most skate and scooter applications.. SET CONTENTS Supplied as a complete set of 16 bearings, suitable for a full skate setup..

ALL SKATES FIT Set of 16 precision 608 bearings, 8x22x7mm size, 22mm outer and 8mm bore diameter, exact fit 8mm axles for use in skateboards, longboards, quad and inline roller skates, engineered for smooth rides with high-performance skate-grade quality.. PREMIUM MATERIALS Fabricated with high-quality chrome bearing steel, with high-strength, low-friction nylon retainer, glossy balls and polished races, optimal groove clearances for stable spinning and long-lasting durability.. SKATE LONGER Black oxidation surface, sleekness, easy lubrication, built to withstand wear that brave the rough outdoor skating with an extended lifespan. Super thin layer barely changes bearing size, accuracy and rolling performance.. DOUBLE SEALS Unlike shieldless or single-shield, paring with dual no-contact seals that effectively keeping out dirt and debris without losing much speed, unique color also adds a stylish touch to complement your wheels.. DURABILITY TESTED No one wants a squeaky, shaky ride. We double-check every bearing carefully and make sure every bearing is in noise-free, smooth, durable condition..

Single-row bearing for supporting radial loads. Shields on both sides of the bearing to keep lubricant in and contaminants out. Carbon steel for durability and resistance to deformity under heavy loads. 34,000 rpm limit with grease lubrication. Dimensions suitable for use in such applications as skateboards, inline skates, and scooters.

Bearing Model AXK2035 I.D.20mm, O.D.35mm, Thickness2mm Washer Model AS2035. Material Chromium steel rollers for heat tolerance and durability under heavy loads Steel cage guides and evenly spaced rollers for reduced friction, vibration and noise. Features Needle Roller Thrust Bearings can accommodate axial loads in one direction only.Combined with 2 washers for applications where adjacent machine components cannot serve as raceways.. Capability45.6kN Static Load Capacity, 12.9kN Dynamic Load Capacity, 8500RPM Maximum Rotational Speed. Package contents2 x bearing,4 x bearing washers..

Packing List12pcs 625zz POM Pulley, Outer Diameter 24mm diameter 5mm Height 10.2mm. NotificationPlease be aware there's a movable copper ring between bearings. It's normal if the ring moves, otherwise bearing can't rorate. It's not quality issue.. DurableSmoothHigh pressure POM circle made with German tech, stronger than molding pulley. Besides, every bearing is well oiled and tested during installation, work excellent in movement.. CompatibilitySuitable for all DIY 3D printers like Creality, Anycubic, Anet series 3D printer.. WarrantyWe respect every customer. So every stepper motor passed QC before shipment. But if you have problem, we still provide free returnexchange in 90 days, pls contact us..

Packing List12pcs 625zz POM Pulley, Outer Diameter 24mm diameter 5mm Height 10.2mm. NotificationPlease be aware there's a movable copper ring between bearings. It's normal if the ring moves, otherwise bearing can't rorate. It's not quality issue.. DurableSmoothHigh pressure POM circle made with German tech, stronger than molding pulley. Besides, every bearing is well oiled and tested during installation, work excellent in movement.. CompatibilitySuitable for all DIY 3D printers like Creality, Anycubic, Anet series 3D printer.. WarrantyWe respect every customer. So every stepper motor passed QC before shipment. But if you have problem, we still provide free returnexchange in 90 days, pls contact us..