{"product_id":"diamapro-7-flexible-backer-pad-5-8-11","title":"DiamaPro 7\" Flexible Backer Pad, 5\/8\"-11","description":"\u003cp\u003e\u003cstrong\u003e- Required mounting accessory for hook-and-loop polishing pads\u003c\/strong\u003e — this is the bridge between the grinder and any 7\" hook-and-loop resin polishing pad (honeycomb pads, satellite pads, sponge pads, transitional resins). The pad attaches to the grinder by the 5\/8\"-11 threaded arbor, and the hook-and-loop face holds the polishing pad in place. Without a backer, the polishing pads in this category cannot mount to a hand grinder.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- 5\/8\"-11 threaded connection for universal 7\" grinder fit\u003c\/strong\u003e — the standard 5\/8\"-11 thread is the most common spindle size on 7\" hand grinders across all major brands (DiamaPro HGX-7, Metabo, Bosch, Makita, DeWalt, Milwaukee, etc.). Always verify the grinder's spindle thread before ordering — some grinders use M14 thread instead of 5\/8\"-11, in which case a thread adapter is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- Flexible construction for even pressure distribution\u003c\/strong\u003e — the \"flexible\" designation means the backer compresses slightly under load, letting the polishing pad face conform to floor contours, lippage, and minor surface irregularities. This delivers a more consistent scratch pattern and gloss across imperfect floors than a rigid backer would. Rigid backers cut faster on perfectly flat surfaces; flexible backers finish more uniformly on real-world slabs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- The single most important pad-and-mount compatibility check\u003c\/strong\u003e — the backer's diameter must match the polishing pad's diameter. A 7\" backer pairs with 7\" pads only; do not run a 5\" pad on a 7\" backer (exposed hook-and-loop edges spinning at high RPM are a safety hazard) or vice versa (pad overhang creates an unbalanced cut and damages the pad edge).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- Required for the DiamaPro Honeycomb resin polishing line\u003c\/strong\u003e — every 7\" honeycomb pad (30, 50, 100, 200, 400, 800 grit) requires this backer to mount. \u003cstrong\u003eMaximum operating RPM is typically 8,000\u003c\/strong\u003e for 7\" hook-and-loop systems; always verify the backer's stamped max RPM against the grinder's rated speed before use, especially with variable-speed polishers that can exceed safe limits if mis-set.\u003c\/p\u003e","brand":"Niagara Machine, Inc","offers":[{"title":"Default Title","offer_id":52141656604953,"sku":"DT-7FLEXBACKER","price":19.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/9803\/7273\/files\/1f2173f4-027e-40d9-b278-13c29865fffa.png?v=1777484443","url":"https:\/\/shop.simiron.com\/products\/diamapro-7-flexible-backer-pad-5-8-11","provider":"Simiron","version":"1.0","type":"link"}