{"product_id":"3-4-inch-bench-grinder-shaft-extension-32mm-bore-arbor-adapter-buffing-polishing","title":"3\/4\" Bench Grinder Shaft Extension – Arbor Adapter for Buffing, Polishing Wheels  32mm Bore","description":"\u003cstyle\u003e\nbody{font-family:Arial,sans-serif;line-height:1.6;margin:20px;}\nh1,h2{color:#333;}\ntable{width:100%;border-collapse:collapse;margin-bottom:30px;}\nth,td{border:1px solid #ccc;padding:8px;text-align:left;}\nth{background-color:#f8f8f8;}\na{color:#0073e6;text-decoration:none;}\na:hover{text-decoration:underline;}\n.cta-btn{display:block;width:100%;text-align:center;background:linear-gradient(90deg,#ff7a00,#ff9900);color:#fff;padding:14px;font-size:18px;font-weight:bold;border-radius:6px;margin:20px 0;text-decoration:none;transition:transform 0.2s,background 0.3s;}\n.cta-btn:hover{background:linear-gradient(90deg,#e96b00,#ff7a00);transform:scale(1.03);}\n@media(max-width:768px){h1{font-size:24px;}h2{font-size:20px;}p,li{font-size:15px;line-height:1.6;}.cta-btn{font-size:16px;padding:12px;}}\n\u003c\/style\u003e\n\n\u003cp\u003eA precision-machined \u003cstrong\u003earbor reducer flange\u003c\/strong\u003e that adapts a \u003cstrong\u003e20mm bore\u003c\/strong\u003e wheel or blade to a \u003cstrong\u003e25mm step diameter\u003c\/strong\u003e spindle. With a \u003cstrong\u003e1.5mm step height\u003c\/strong\u003e and \u003cstrong\u003e4–5mm total adapter thickness\u003c\/strong\u003e, this low-profile flange provides a stable, centered clamping surface for setups requiring minimal axial offset. Designed for bench grinders, lapidary machines, and diamond saw setups where bore-to-spindle mismatches require a reliable, vibration-free solution.\u003c\/p\u003e\n\n\u003ca class=\"cta-btn\" href=\"\/en-mx\/collections\/machine-accessories\"\u003e🔥 Shop Machine Accessories – From $5.00\u003c\/a\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Size\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStep Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStep Height\u003c\/td\u003e\n\u003ctd\u003e1.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Adapter Thickness\u003c\/td\u003e\n\u003ctd\u003e4–5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eArbor Reducer Flange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eGrinding Wheels, Saw Blade Mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTool Type\u003c\/td\u003e\n\u003ctd\u003eBench Grinder \/ Lapidary Machine \/ Diamond Saw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGrinding wheels — adapt 20mm bore wheels to 25mm spindle diameter on bench grinders\u003c\/li\u003e\n\u003cli\u003eDiamond saw blades — secure blade mounting where bore and spindle sizes differ\u003c\/li\u003e\n\u003cli\u003eLapidary machines — compatible with standard lapidary bench grinders and combination machines\u003c\/li\u003e\n\u003cli\u003ePolishing and buffing setups — centered flange support for smooth, vibration-free operation\u003c\/li\u003e\n\u003cli\u003eWorkshop saws — trim saws and slab saws with 25mm spindle and 20mm bore blades\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRelated Tools\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-mx\/collections\/machine-accessories\"\u003eMachine Accessories\u003c\/a\u003e — Full range of arbor flanges, adapters, backing plates, and spacers\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-mx\/collections\/saw-blade-arbor-adapters\"\u003eSaw Blade Arbor Adapters\u003c\/a\u003e — Bore conversion adapters for trim saws and slab saws\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-mx\/collections\/bench-wheel-spacers\"\u003eBench Wheel Spacers\u003c\/a\u003e — Stainless steel and aluminium spacer sets for wheel alignment\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-mx\/collections\/diamond-grinding-wheel\"\u003eDiamond Grinding Wheels\u003c\/a\u003e — Full range of diamond wheels for lapidary bench grinders\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-mx\/collections\/pro-slicer-diamond-saw-blade\"\u003eDiamond Saw Blades\u003c\/a\u003e — Precision diamond blades for lapidary and stone cutting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What does an arbor reducer flange do?\u003c\/strong\u003e\u003cbr\u003e\nA: An arbor reducer flange fills the gap between a wheel or blade bore and the machine spindle diameter. This flange adapts a \u003cstrong\u003e20mm bore\u003c\/strong\u003e wheel to a \u003cstrong\u003e25mm spindle\u003c\/strong\u003e, ensuring the wheel is centered and clamped securely with no wobble or runout. The 1.5mm step height and 4–5mm total thickness provide correct axial positioning for setups requiring minimal offset.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Is this flange compatible with my bench grinder or saw?\u003c\/strong\u003e\u003cbr\u003e\nA: This flange is designed for machines with a \u003cstrong\u003e25mm spindle diameter\u003c\/strong\u003e where the wheel or blade has a \u003cstrong\u003e20mm bore\u003c\/strong\u003e. Verify both your machine spindle OD and your wheel\/blade bore before ordering. For other size combinations, see our full range of arbor reducer flanges.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the difference between 1.5mm and 3.5mm step height?\u003c\/strong\u003e\u003cbr\u003e\nA: The step height determines how deep the flange seats into the wheel bore. A \u003cstrong\u003e1.5mm step\u003c\/strong\u003e is a low-profile option suited for setups where minimal axial offset is required or where wheel bore depth is shallow. A 3.5mm step provides deeper engagement for additional stability. Choose based on your wheel bore depth and machine guard clearance.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Is this listing for a single flange or a set?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is for a \u003cstrong\u003esingle arbor reducer flange\u003c\/strong\u003e. If your setup requires flanges on both sides of the wheel, order two units.\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"hanslapidarytool","offers":[{"title":"16mm \/ Right-Hand Thread (RH)","offer_id":53385417654456,"sku":null,"price":25.64,"currency_code":"USD","in_stock":true},{"title":"16mm \/ Left-Hand Thread (LH)","offer_id":53385425092792,"sku":null,"price":25.64,"currency_code":"USD","in_stock":true},{"title":"19mm \/ Right-Hand Thread (RH)","offer_id":53385417687224,"sku":null,"price":25.64,"currency_code":"USD","in_stock":true},{"title":"19mm \/ Left-Hand Thread (LH)","offer_id":53385425125560,"sku":null,"price":25.64,"currency_code":"USD","in_stock":true},{"title":"24mm \/ Right-Hand Thread (RH)","offer_id":53385417719992,"sku":null,"price":25.64,"currency_code":"USD","in_stock":true},{"title":"24mm \/ Left-Hand Thread (LH)","offer_id":53385425158328,"sku":null,"price":25.64,"currency_code":"USD","in_stock":true},{"title":"28mm \/ Right-Hand Thread (RH)","offer_id":53385417752760,"sku":null,"price":25.64,"currency_code":"USD","in_stock":true},{"title":"28mm \/ Left-Hand Thread (LH)","offer_id":53385425191096,"sku":null,"price":25.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0570\/3217\/9896\/files\/MotorShaftArborAdapterExtender.png?v=1776995835","url":"https:\/\/lapidarygrinder.com\/en-mx\/products\/3-4-inch-bench-grinder-shaft-extension-32mm-bore-arbor-adapter-buffing-polishing","provider":"hanslapidarytool","version":"1.0","type":"link"}