2pcs Square Flange Linear Ball Bearings Linear Motion 20mm Bore Dia 32mm OD 42mm L LMK20UU Flanged Ball Valve Bearing Feature:1. Small load with minimal resistance: Square flanged linear ball bearings are a low-cost linear motion system for use with infinite-travel cylindrical shafts. Because the bearing ball has a point with the shaft, the working load is small. The steel ball rotates with minimal frictional resistance, resulting in smooth motion with high accuracy2. Accurate and fast: Linear bearings are used in combination with hardened linear drive shafts to create infinite linear motion systems. Because the load balls and hardened drive shafts are in point , the allowable load is small, but during linear motion, the frictional resistance is the smallest, it has high accuracy and fast movement3. Easy to do: the bearing block has a certain load capacity, can be installed on the ordinary accuracy rack, and has strong adaptability. The linear guide shaft has low friction resistance, can achieve high accuracy rotation in smooth motion, and is easy to maintain and replace4. Low Noise and High Rigidity: The steel ball bearing forms a complete closed loop, which makes the raceway very accurate and improves the stability of the bearing, with low noise, stable movement, low friction, high rigidity, smooth operation and long service life5. Widely used: Guide rail brackets are widely used in digital 12D coordinate measuring equipment, such as accuracy equipment or special machinery industries, and are suitable for various electronic equipment, guide rods and columnsSpecification:Item Type: Square Flange Linear Ball BearingsModel: LMK20UUS Shaft Diameter: Approx. 20mm/0.79inOuter Diameter: Approx. 32mm/1.26inLength: Approx. 42mm/1.65in Material: Bearing SteelPacking List:2 x square flange linear ball bearingsNote: Requires regular cleaning and maintenance. Usage:1. Grease can be applied before use to improve smoothness.2. Keep the optical axes and guide rail lubricated during operation.3. The table top must be level during installation, otherwise it will interfere with the calibration of the installation. 1) we accept Alipay, West Union, TT. All major credit cards are accepted through the payment processor's secure escrow. 2) Payment must be made within 3 days of order. 3) If you can't check out immediately after the auction ends, please wait a few minutes and try again, payments should be completed within 3 days. About Shipping 1. WORLDWIDE SHIPPING. (Except some countries and APO/FPO)2. Orders processedtimely after thepayment verification.3. We only ship to confirmed order addresses. Your order address MUST MATCH your Shipping address.4. The images shown are not the actual item and are for your reference only.5. SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays. Transit times may vary, particularly during the holiday season.6. If you have not received your shipment within the period, please us. We will track the shipment and get back to you as soon as possible with a reply. Our goal is customer !7. Due to stock status and time differences, we will choose to ship your item from our first available warehouse for fast delivery. 8. The seller is not responsible for the import duty, the buyer is responsible for it. Any disputes caused by this are unfounded. 9. BR buyer please provide the cpf or cnpj, it will be better for you to get it more quickly. thanks Return and Refund 1. You have 7 days to apply and 30 days to return it from the date you received it. If this item is in your possession for more than 7 days, it is considered used, and we will not issue you a refund or exchange. There are no exceptions! The shipping cost is borne by both the seller and the buyer in half.2. All returned items must be in their original packaging and you must provide us with the tracking number, the specific reason and your number after.3. We will refund your full winning bid amount, upon receipt of the item in its original condition and packaging with all components and accessories included, after both the buyer and seller cancel the transaction from aliexpress. Or you can choose to replace.4. We will bear all shipping costs if the product(s) is(are) not as advertised.