{"product_id":"one-thk-srs15m-linear-slide-block-bearing","title":"One THK SRS15M Linear Slide Block Bearing","description":"\u003cp style=\"font-family:Arial, Helvetica, sans-serif; color:#0056B3; font-size:14px; line-height:22px; letter-spacing:1px; text-transform:uppercase; margin:0 0 24px 0;\"\u003eTHK · Linear Motion · SRS Series · 15mm Rail Width · In stock\u003c\/p\u003e\n\u003ch2 style=\"font-family:Arial, Helvetica, sans-serif; color:#111111; font-size:22px; line-height:30px; margin:32px 0 16px 0;\"\u003eWhat Is the THK SRS15M Linear Slide Block Bearing?\u003c\/h2\u003e\n\u003cp style=\"font-family:Arial, Helvetica, sans-serif; color:#333333; font-size:16px; line-height:26px; margin:0 0 16px 0;\"\u003eThe \u003cstrong\u003eTHK SRS15M\u003c\/strong\u003e is a linear motion bearing carriage (block) from THK's SRS miniature guide series. Inside the block, precision-ground steel balls recirculate through internal pathways, rolling between the block's raceways and the grooves of a matching 15mm-wide rail. This rolling-element design eliminates the stick-slip friction of plain bearings, delivering smooth, predictable motion for \u003ca href=\"https:\/\/koeed.com\/collections\" style=\"color:#0056B3; text-decoration:underline;\"\u003eCNC machinery\u003c\/a\u003e, automated assembly stations, semiconductor wafer handlers, and optical inspection stages. The M preload class means the balls are sized to create a slight internal interference fit, boosting rigidity without excessive drag.\u003c\/p\u003e\n\u003cp style=\"font-family:Arial, Helvetica, sans-serif; color:#333333; font-size:16px; line-height:26px; margin:0 0 16px 0;\"\u003e\u003cstrong\u003eIn short:\u003c\/strong\u003e A genuine THK carriage block engineered for a 15mm SRS rail — the precision motion component you install when positioning accuracy, travel smoothness, and repeatability are non-negotiable.\u003c\/p\u003e\n\u003ch2 style=\"font-family:Arial, Helvetica, sans-serif; color:#111111; font-size:22px; line-height:30px; margin:32px 0 16px 0;\"\u003eThree Things That Determine Linear Guide Performance\u003c\/h2\u003e\n\u003ch3 style=\"font-family:Arial, Helvetica, sans-serif; color:#111111; font-size:18px; line-height:26px; margin:24px 0 8px 0;\"\u003e1. Ball Recirculation Quality\u003c\/h3\u003e\n\u003cp style=\"font-family:Arial, Helvetica, sans-serif; color:#333333; font-size:15px; line-height:24px; margin:0 0 16px 0;\"\u003eThe defining feature of a THK guide is how smoothly the balls transition from the load-bearing straight section into the return path inside the end caps. Poor recirculation causes velocity ripple — microscopic speed variations that show up as chatter marks on a machined surface or blur in a vision system image. THK's injection-molded return guides maintain ball spacing and prevent jamming even at speeds above 1 m\/s.\u003c\/p\u003e\n\u003ch3 style=\"font-family:Arial, Helvetica, sans-serif; color:#111111; font-size:18px; line-height:26px; margin:24px 0 8px 0;\"\u003e2. Preload Selection: Why M (Medium) Matters\u003c\/h3\u003e\n\u003cp style=\"font-family:Arial, Helvetica, sans-serif; color:#333333; font-size:15px; line-height:24px; margin:0 0 16px 0;\"\u003eMedium preload removes the microscopic clearance between balls and raceways, stiffening the joint without creating so much friction that it taxes the motor. This is the sweet spot for general automation — enough rigidity to hold position under moderate cutting or inertial loads, but not so tight that the drive needs to fight internal drag. If your application involves intermittent cutting forces (router, mill-drill), medium preload is the right starting point.\u003c\/p\u003e\n\u003ch3 style=\"font-family:Arial, Helvetica, sans-serif; color:#111111; font-size:18px; line-height:26px; margin:24px 0 8px 0;\"\u003e3. Seal Integrity and Contamination\u003c\/h3\u003e\n\u003cp style=\"font-family:Arial, Helvetica, sans-serif; color:#333333; font-size:15px; line-height:24px; margin:0 0 16px 0;\"\u003eThe end seals are the first line of defense against particulate ingress. Inspect them upon arrival — a torn lip or missing seal lets chips, dust, or coolant into the ball path, where they act as grinding compound. In woodworking, graphite-heavy, or ceramic-powder environments, add secondary bellows or way covers. The seals are replaceable; if yours arrive damaged, contact us before installing the block.\u003c\/p\u003e\n\u003ch2 style=\"font-family:Arial, Helvetica, sans-serif; color:#111111; font-size:22px; line-height:30px; margin:32px 0 16px 0;\"\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; border:1px solid #eeeeee; font-family:Arial, Helvetica, sans-serif; font-size:14px;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:40%; background-color:#f4fcfc; padding:12px 16px; border:1px solid #eeeeee; color:#111111; font-weight:bold;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"background-color:#f4fcfc; padding:12px 16px; border:1px solid #eeeeee; color:#333333;\"\u003eTHK Co., Ltd. (Japan)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:40%; background-color:#fafafa; padding:12px 16px; border:1px solid #eeeeee; color:#111111; font-weight:bold;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"background-color:#fafafa; padding:12px 16px; border:1px solid #eeeeee; color:#333333;\"\u003eSRS15M (bearing block only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:40%; background-color:#f4fcfc; padding:12px 16px; border:1px solid #eeeeee; color:#111111; font-weight:bold;\"\u003eRail Compatibility\u003c\/td\u003e\n\u003ctd style=\"background-color:#f4fcfc; padding:12px 16px; border:1px solid #eeeeee; color:#333333;\"\u003eTHK SRS 15mm rail profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:40%; background-color:#fafafa; padding:12px 16px; border:1px solid #eeeeee; color:#111111; font-weight:bold;\"\u003ePreload Class\u003c\/td\u003e\n\u003ctd style=\"background-color:#fafafa; padding:12px 16px; border:1px solid #eeeeee; color:#333333;\"\u003eM (Medium)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:40%; background-color:#f4fcfc; padding:12px 16px; border:1px solid #eeeeee; color:#111111; font-weight:bold;\"\u003eMounting\u003c\/td\u003e\n\u003ctd style=\"background-color:#f4fcfc; padding:12px 16px; border:1px solid #eeeeee; color:#333333;\"\u003eRefer to THK catalog for bolt size and pattern\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:40%; background-color:#fafafa; padding:12px 16px; border:1px solid #eeeeee; color:#111111; font-weight:bold;\"\u003eCondition\u003c\/td\u003e\n\u003ctd style=\"background-color:#fafafa; padding:12px 16px; border:1px solid #eeeeee; color:#333333;\"\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2 style=\"font-family:Arial, Helvetica, sans-serif; color:#111111; font-size:22px; line-height:30px; margin:32px 0 16px 0;\"\u003eWhere You Will Find the SRS15M Installed\u003c\/h2\u003e\n\u003cul style=\"font-family:Arial, Helvetica, sans-serif; color:#333333; font-size:15px; line-height:24px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eBenchtop CNC spindle carriage:\u003c\/strong\u003e Z-axis on small routers and engravers where space is tight and precision matters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSMT component placement:\u003c\/strong\u003e High-speed linear axes in pick-and-place machines cycling millions of strokes per year.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDIY CoreXY 3D printers:\u003c\/strong\u003e Enthusiast upgrades from wheel-based linear motion to proper recirculating ball guides.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVision inspection gantries:\u003c\/strong\u003e Camera sleds traversing parts for automated defect detection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLab automation workstations:\u003c\/strong\u003e Pipette tip changers and sample tray shuttles needing quiet, clean operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"font-family:Arial, Helvetica, sans-serif; color:#111111; font-size:22px; line-height:30px; margin:32px 0 16px 0;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3 style=\"font-family:Arial, Helvetica, sans-serif; color:#111111; font-size:17px; line-height:26px; margin:24px 0 8px 0;\"\u003eDoes this listing include the rail, or just the bearing block?\u003c\/h3\u003e\n\u003cp style=\"font-family:Arial, Helvetica, sans-serif; color:#333333; font-size:15px; line-height:24px; margin:0 0 16px 0;\"\u003eThis is the bearing block (carriage) only. The matching SRS 15mm rail is sold separately. THK normally ships blocks and rails as factory-matched pairs to achieve the stated preload — mixing a used block with a new rail or swapping blocks between different rails can shift the preload outside the specified range. If you need a complete rail-and-block set, \u003ca href=\"https:\/\/koeed.com\/pages\/request-for-quote\" style=\"color:#0056B3; text-decoration:underline;\"\u003esend us your rail length\u003c\/a\u003e and we will quote the full assembly.\u003c\/p\u003e\n\u003ch3 style=\"font-family:Arial, Helvetica, sans-serif; color:#111111; font-size:17px; line-height:26px; margin:24px 0 8px 0;\"\u003eWhat lubrication schedule should I follow?\u003c\/h3\u003e\n\u003cp style=\"font-family:Arial, Helvetica, sans-serif; color:#333333; font-size:15px; line-height:24px; margin:0 0 16px 0;\"\u003eTHK specifies lithium soap grease at NLGI 1-2 consistency, with the factory fill typically being THK AFB-LF. Re-grease every 100 km of travel or 3-6 months in clean environments. In dusty, wet, or washdown conditions, shorten that interval substantially. Apply grease through the nipple if fitted, or directly onto the rail grooves and stroke the block to distribute. Critically: never mix lithium soap and polyurea greases — the chemical reaction hardens the mixture and can seize the ball circuits.\u003c\/p\u003e\n\u003ch3 style=\"font-family:Arial, Helvetica, sans-serif; color:#111111; font-size:17px; line-height:26px; margin:24px 0 8px 0;\"\u003eIs this a genuine THK product or an aftermarket copy?\u003c\/h3\u003e\n\u003cp style=\"font-family:Arial, Helvetica, sans-serif; color:#333333; font-size:15px; line-height:24px; margin:0 0 16px 0;\"\u003eThis is a genuine THK component. Authentic blocks carry laser-etched markings (model, lot code, THK logo) directly on the steel body. The end caps fit precisely with no gaps or visible glue. Counterfeit blocks typically have rougher surface finish, painted-on markings that rub off, and noticeably higher rolling resistance. We source through authorized THK distribution channels. \u003ca href=\"https:\/\/koeed.com\/pages\/about-us\" style=\"color:#0056B3; text-decoration:underline;\"\u003eRead about our supply chain standards\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3 style=\"font-family:Arial, Helvetica, sans-serif; color:#111111; font-size:17px; line-height:26px; margin:24px 0 8px 0;\"\u003eHow many blocks do I need for one linear axis?\u003c\/h3\u003e\n\u003cp style=\"font-family:Arial, Helvetica, sans-serif; color:#333333; font-size:15px; line-height:24px; margin:0 0 16px 0;\"\u003eA single block cannot resist moment (twisting) loads — when the load center of gravity is offset from the block center, the block experiences a torque that one bearing row alone cannot handle. Use at least two blocks on one rail, or ideally one block on each of two parallel rails (which also handles lateral moments). Installing a single block on a single rail is acceptable only for completely unloaded guide applications (camera sliders, sensor positioning) where the only force is the carriage's own weight.\u003c\/p\u003e\n\u003cdiv style=\"background-color:#16c8c8; padding:24px 32px; margin:32px 0; text-align:center; font-family:Arial, Helvetica, sans-serif; border-radius:4px;\"\u003e\n\u003ch3 style=\"margin:0 0 12px 0; color:#ffffff; font-size:20px; line-height:28px;\"\u003eSourcing a complete motion system?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 16px 0; color:#ffffff; font-size:15px; line-height:22px;\"\u003eRails, blocks, ball screws, motor mounts — send your full BOM to \u003cstrong\u003eMoritta@KOEED.COM\u003c\/strong\u003e and we quote everything together.\u003c\/p\u003e\n\u003ca href=\"mailto:Moritta@KOEED.COM?subject=RFQ%20THK%20SRS15M%20Motion%20System\" style=\"display:inline-block; background-color:#ffffff; color:#0056B3; padding:12px 24px; text-decoration:none; font-weight:bold; border-radius:4px; font-size:15px;\"\u003eSend Your BOM →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #0056B3; padding:16px 24px; margin:16px 0; text-align:left; font-family:Arial, Helvetica, sans-serif; border-radius:4px;\"\u003e\n\u003cp style=\"margin:0 0 8px 0; color:#111111; font-size:15px; line-height:22px;\"\u003eNeed rails, ball screws, couplings, or linear bearings?\u003c\/p\u003e\n\u003ca href=\"https:\/\/koeed.com\/collections\" style=\"display:inline-block; color:#0056B3; padding:6px 18px; text-decoration:none; font-weight:bold; border:1px solid #0056B3; border-radius:4px; font-size:14px;\"\u003eBrowse All Components →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #eeeeee; background-color:#f4fcfc; padding:16px 24px; margin:16px 0; font-family:Arial, Helvetica, sans-serif; border-radius:4px;\"\u003e\n\u003cp style=\"margin:0 0 4px 0; color:#111111; font-size:15px; font-weight:bold;\"\u003e\u0026gt; Debugging a servo drive fault on your motion system?\u003c\/p\u003e\n\u003cp style=\"margin:0 0 8px 0; color:#333333; font-size:14px;\"\u003eUse the KOEED AI Diagnostic Tool for instant error code identification and fix suggestions.\u003c\/p\u003e\n\u003ca href=\"https:\/\/koeed.com\/pages\/ai-tool\" style=\"color:#0056B3; text-decoration:underline; font-weight:bold; font-size:14px;\"\u003eLaunch AI Diagnostic Tool\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-family:Arial, Helvetica, sans-serif; color:#555555; font-size:13px; line-height:20px; margin:24px 0 8px 0;\"\u003e\u003cem\u003ekoeed.com — Your Trusted PLC Supplier. Precision motion components, automation parts, and industrial electronics. Worldwide shipping. Quote within 24h at Moritta@KOEED.COM.\u003c\/em\u003e\u003c\/p\u003e","brand":"THK","offers":[{"title":"Default Title","offer_id":46852576313529,"sku":"306866851809","price":59.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/8476\/7929\/files\/1_85f59fa0-e2ad-45d3-a049-4292a04adc73.webp?v=1783334020","url":"https:\/\/koeed.com\/el\/products\/one-thk-srs15m-linear-slide-block-bearing","provider":"KOEED","version":"1.0","type":"link"}