Reviews 4mm Ball Bearing

16 Pack Fidget Spinner Bearing and Cap Replacement Set, Chrome Steel Bearing Balls, High Speed 13mmx7mmx4mm Bearings Single Sealed Small Bearings for Fidget Spinner

  • [Package Content] This package includes 16pcs MR137 precision high-speed ball bearing with blue plastic seals and 16 pairs of ball bearing caps in black color (diameter: approx. 2.1cm). MR137 Steel Ball Bearing sizes: I.D.(inner diameter)=7mm.
  • [Premium Quality] The bearing is made of high-quality stainless steel and plastic for durability and resistance to deformity under heavy loads. Inner and outer races are machine polished for smooth, high-speed rolling. This bearing provides higher speeds, precision, and durability, reducing replacement and maintenance costs..
  • [Radial Ball Bearing] MR137 bearings are sealed on one side to protect against contaminants like dust and water out of the apparatus and retain lubrication. Stainless steel races ensure durability and corrosion resistance. Single-row radial ball bearing for applications that support radial and axial loads..
  • [Spinner Cap & Wide Application] Caps made with ABS plastic are lightweight but durable, compatible with MR137 bearings. Easy to install and uninstall the two components. This bearing set can be used in a wide variety of applications, including fidget spinner creation, replacement, and more DIY projects, perfect for fidget spinner frame replacem....
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Litorange 620 Pieces 15 Size 1-10MM Metric Precision Chrome Steel Assorted Loose Bicycle Bearing Ball Assortment Kit with 2pcs Black Precision Tweezer

  • ☀【What You Get】: In this bearing ball set, it include 15 size of 60pcs 1mm ,60pcs 1.5mm ,60pcs 2mm , 60pcs 2mm, 60pcs 2.5mm, 50pcs 3mm, 50pcs 3.5mm, 50pcs 4mm, 50pcs 4.5mm, 50pcs 5mm, 30pcs 5.5mm, 30pcs 6mm, 20pcs 7mm, 20pcs 8mm ,15pcs 9mm,15pcs 10mm total 620pcs with 2pcs black precision tweezer sorted in individual bags and well packaged in a plastic box. They are not easy to roll around and mixed..
  • ☀【Durable Material】: All the bearing ball are made of high quality chrome steel, high precision machine for accurate size. They are fully round shape and surface polished smooth. With lightly oiled on them to improve lubrication and protect against corrosion and rust..
  • ☀【Product Feature】: These Bearing balls are installed between the inner and outer rings to reduce friction during bearing rotation and reduce the ball bearing speed. Will cause less damage to the machine and extend the lifespan..
  • ☀【Saving Time and Money】: If you are a home mechanics of bicycle or furniture, choose them, this package with multiple size and quantity will meet your needs. You will no need to run to the store and pay more for repairing..
  • ☀【Application】: These bearing ball are useful for bicycles, motorcycle, home furniture, casters, drawer slides, do....
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NiArt Fidget Spinner Toy DIY Bearing with Caps Set 22-Pack, MR137 0.5" Single-Sealed Chrome Steel Bearing Balls Replacement High Speed 13mmx7mmx4mm Epoxy Resin Casting Craft Skateboard Stress Reliever

  • ✅【Package Contents】This package includes 22pcs MR137 precision high-speed ball bearings with blue plastic seals and 22 pairs of ball bearing caps in black color (diameter: approx. 2.1cm). MR137 steel ball bearing size: I.D. (Inner Diameter): 7mm, O.D. (Outer Diameter): 13mm, Thickness: 4mm..
  • ✅【Premium Quality】The bearing is made of high-quality stainless steel and plastic for durability and resistance to deformation under heavy loads. The inner and outer races are machine-polished for smooth, high-speed rolling. This bearing provides higher speed, precision and durability, reducing replacement and maintenance costs..
  • ✅【Radial Ball Bearing】The MR137 bearing is sealed on one side to keep contaminants such as dust and water from entering the equipment and keep it lubricated. Stainless-steel races ensure durability and corrosion resistance. The single-row radial ball bearing is suitable for applications with radial and axial loads..
  • ✅【Spinner Cap & Wide Application】The ABS plastic caps are lightweight, durable and compatible with MR137 bearings. With components that are easy to install and unloa....
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NiArt Fidget Spinner Toy DIY Bearing with Caps Set 24-Pack, MR137 0.5" Single-Sealed Chrome Steel Bearing Balls Replacement High Speed 13mmx7mmx4mm Epoxy Resin Casting Craft Skateboard Stress Reliever

  • ✔️【Package Contents】This package includes 24pcs MR137 precision high-speed ball bearings with blue plastic seals and 24 pairs of ball bearing caps in black color (diameter: approx. 2.1cm). MR137 steel ball bearing size: I.D. (Inner Diameter): 7mm, O.D. (Outer Diameter): 13mm, Thickness: 4mm..
  • ✔️【Premium Quality】The bearing is made of high-quality stainless steel and plastic for durability and resistance to deformation under heavy loads. The inner and outer races are machine-polished for smooth, high-speed rolling. This bearing provides higher speed, precision and durability, reducing replacement and maintenance costs..
  • ✔️【Radial Ball Bearing】The MR137 bearing is sealed on one side to keep contaminants such as dust and water from entering the equipment and keep it lubricated. Stainless-steel races ensure durability and corrosion resistance. The single-row radial ball bearing is suitable for applications with radial and axial loads..
  • ✔️【Spinner Cap & Wide Application】The ABS plastic caps are lightweight, durable and compatible with MR137 bearings. With components that are easy to insta....
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uxcell F4-10M Thrust Ball Bearings 4mm x 10mm x 4mm Chrome Steel Single Direction 5pcs

  • [SIZE] - Bore Diameter=4mm, Outer Diameter=10mm, Thickness=4mm.
  • [MATERIAL] - Made of Chrome Steel(AISI 52100), have great wear-resistant, high temperature resistance and high hardness.
  • [CAPABILITY] - Dynamic Load Rating (Cr): 0.658kN.
  • Limiting Speed (Grease): 6000rpm, designed for low speed operation and axial loads only.
  • [APPLICATION] - Can be used for oven turntable, jack, pump, rotating applications, machine tools, automobiles, ect..
  • [FEATURES] - The separable components of thrust ball bearings are interchangeable. Low noise and long service life, easy to maintain. Keep the bearing working environment clean and bearing lubricated in time.
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BokWin 8Pcs 1/2\ Roller Ball Transfer Bearings Flange Mounted Nylon Ball Transfer Unit for Conveyor, Roller Stand, Transmission, Load Capacity 22 lbs

  • 【CAPACITY】Each bearing unit with a load capacity of 22 lbs..
  • 【SIZE】16 Pcs 5/8 inch diameter ball bearing roller, 360-degree rotation..
  • 【Material】Stainless steel & nylon, the ball has the function of resist compression..
  • 【MOUNTING】Two screw holes, Mounting Hole Dia: 4mm/0.16-inch..
  • 【APPLICATION】Widely used in the transmission system, feeding system, processing system, processing machinery..
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Breezliy 590Pcs 1-8mm Metric Precision 304 Stainless Steel Assorted Loose Bicycle Bearing Steel Ball Assortment Kit（12 Sizes）

  • [12 sizes of bearing balls] The precision steel bearing ball classification kit contains 12 sizes: 1mm2mm2.5mm3mm3.5mm4mm4.5mm5mm5.5mm6mm7mm8mm, total 590pcs, and packed in a plastic box, they are easy to distinguish..
  • [Product function]: These bearing balls are installed between the inner ring and the outer ring to reduce friction when the bearing rotates. Will reduce the damage to the machine and extend the service life..
  • [Performance] The surface is coated with a small amount of grease to improve lubrication and prevent corrosion and rust. It is suitable for humid environments. The heat treatment process makes the bearing ball very strong, not easily deformed for a long time and can withstand voltage..
  • [High-quality material] It is made of high-quality 304 stainless steel, high-precision machine, corrosion-resistant, high-precision, high-hardness, smooth and burr-free..
  • [Wide application] Widely used in motorcycles, bicycles, casters, household furniture, door locks, drawer slides and many other applications..
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10Pcs 1/3\ Mini Nylon Ball Transfer Bearing Unit 0.34mm Table Conveyor Roller Ball for Transmission, Furniture,Wheelchair- 1/3inch

  • 【CAPACITY】Each ball transfer roller with a load capacity of 33 lbs..
  • 【SIZE】16 Pcs 5/8 inch diameter ball bearing roller, 360-degree rotation..
  • 【Material】The bearing units were made of high quality carbon steel, strong and durable, good wear resistance and not easy to wear out..
  • 【MOUNTING】Two screw holes, Mounting Hole Dia: 4mm/0.16-inch..
  • 【APPLICATION】Widely used in conveyor lines installing, home appliance, transmission system, processing system, wooden case, transmission furniture, workbench, etc..
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Hudson Bearings SBT-1CS 1/4 Stud Mounted Ball Transfer, Carbon Steel, 1\ Diameter, 75 lbs Load Capacity, 1/4\-20 Thread Stem (Case of 10)

  • 【CAPACITY】Each ball transfer roller with a load capacity of 55 lbs..
  • 【SIZE】16 Pcs 3/4 inch diameter ball bearing roller, 360-degree rotation..
  • 【Material】The bearing units were made of high quality carbon steel, strong and durable, good wear resistance and not easy to wear out..
  • 【MOUNTING】Two screw holes, Mounting Hole Dia: 4mm/0.16-inch..
  • 【APPLICATION】Widely used in conveyor lines installing, home appliance, transmission system, processing system, wooden case, transmission furniture, workbench, etc..
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16 Pack 4 Colors Fidget Spinner Bearing and Cap Replacement Set, Chrome Steel Bearing Balls, High Speed 13mmx7mmx4mm Bearings Single Sealed Small Bearings for Fidget Spinner

  • 【16PCS Bearings + Caps Set】 Includes 16x MR137 precision high-speed ball bearings with blue plastic seals and 16 pairs of ball bearing caps in four bright colors (diameter: approx. 2.1cm). MR137 Steel Ball Bearing size: I.D. (inner diameter) =7mm, O.D. (outer diameter) = 13mm, Thickness: 4mm..
  • 【Premium Quality】 The bearings are made of high-quality stainless steel and plastic for durability and deformation resistance under heavy loads. Inner and outer races are machine polished for smooth, high-speed rolling. This bearing provides higher speeds, precision, and durability, reducing replacement and maintenance costs..
  • 【Radial Ball Bearings】 MR137 bearings are sealed on one side to protect the equipment against contaminants such as dust and water and retain lubrication. Stainless steel races ensure durability and corrosion resistance. Single row radial ball bearings support applications with radial and axial loads..
  • 【Wide Application】 Caps made with ABS plastic are lightweight and durable, compatible with MR137 bearings. With easy-to-install components, this bearing is perfect for a wide variety of applications, including fidget spinners, skateboards and other DIY projects. Use as replacement when the original caps and bearings are lost or ....
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