{"product_id":"thk-sr20-tbss-four-row-linear-bearing-block-carriage","title":"THK SR20-TBSS Four Row Linear Bearing Block Carriage","description":"\u003cdiv\u003e\u003cp\u003eThe THK SR20-TBSS four-row radial-type flange linear bearing block is designed to work with THK SR20 rails, delivering high rigidity and smooth, low-friction motion in demanding industrial applications. Commonly installed in CNC machine tools, semiconductor manufacturing equipment, robotics, packaging machinery, precision inspection systems, and automated production equipment, it serves OEM replacement, machine repair, retrofit projects, and the construction of precision linear motion systems—an option of interest to system integrators. Technical specs include: Manufacturer THK; Part Number SR20-TBSS; Series SR20 Full-Ball LM Guide; Block Style TB (Long Flange); Bearing Design Four-Row Ball Raceway; Compatible Rail Size SR20; Overall Height 28 mm; Overall Width 59 mm; Overall Length 66.2 mm; LM Block Width 49 mm; Mounting Hole Spacing 32 mm; LM Block Length 46.7 mm; Mounting Thread Size M8; Grease Nipple B-M6F; Seal Configuration SS; Preload Standard; Accuracy Grade Normal; Material Hardened Bearing Steel; Lubrication Grease or Oil; Operating Temperature -20°C to 80°C. Features include four-row equal-load ball raceway, long flange mounting design, high rigidity, smooth low-friction operation, high positioning accuracy, relubrication through the grease nipple, excellent wear resistance, and long service life. Common replacements: THK SR20TBUU, SR20SBSS, SR20TBMSS.\u003c\/p\u003e\u003c\/div\u003e","brand":"THK","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46242808365290,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-008.png?v=1788727429","url":"https:\/\/gtghardware.com\/products\/thk-sr20-tbss-four-row-linear-bearing-block-carriage","provider":"GTG Hardware","version":"1.0","type":"link"}