{"product_id":"fresa-igm-m138-per-arrotondare-bordi","title":"IGM M138 Roundover Router Bit for Edges","description":"\u003cp\u003eIGM M138 is a rounding-over router bit with 2 carbide cutting edges (HW) and an integrated guide bearing for rounding sharp edges on solid wood, MDF, laminate, plastic and artificial stone. It is available in 9 versions with radii from 1 to 16 mm. For use on handheld routers only. Distributed in Italy by Krollit, official IGM distributor since 2007.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAvailable radii: 1, 2, 3, 6.3, 8, 9.5, 12, 16 mm\u003c\/li\u003e\n\u003cli\u003eCutting diameter: from 11.5 mm (R1) to 44.7 mm (R16)\u003c\/li\u003e\n\u003cli\u003eCutting height: from 9.5 mm (R1–R3) to 22 mm (R16)\u003c\/li\u003e\n\u003cli\u003eShank: 6 mm (R2 and R3 versions) or 8 mm (all other versions)\u003c\/li\u003e\n\u003cli\u003eGuide bearing: included in all versions, positioned at the tip\u003c\/li\u003e\n\u003cli\u003eCutting edge material: micro-grain HW carbide, hardness 93.5 HRA, thickness 2 mm\u003c\/li\u003e\n\u003cli\u003eRed PTFE Teflon coating: protection against corrosion, resin and burn marks\u003c\/li\u003e\n\u003cli\u003eAnti-kickback technology compliant with EN 847\u003c\/li\u003e\n\u003cli\u003eLaser-marked shank with parameters and “K” point for optimal positioning in the collet\u003c\/li\u003e\n\u003cli\u003eExclusive use: handheld routers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWho uses the M138 and what it is used for\u003c\/h3\u003e\n\u003cp\u003eThe IGM M138 router bit is used by carpenters, furniture manufacturers and edge-banding installers to round sharp edges on panels, worktops, doors and frames. Small radii (R1, R2, R3) are chosen for finishing ABS edging on kitchen doors and furniture, where the sharp edge left by the automatic edge bander needs to be softened with a minimal radius. Medium radii (R6.3, R8, R9.5) are the most commonly used for decorative edges on solid wood and MDF worktops. Large radii (R12, R16) produce wide decorative profiles on frames, panels and artificial stone surfaces. The bearing at the tip guides the bit along the edge of the workpiece, ensuring uniform material removal along the entire length.\u003c\/p\u003e\n\u003ch3\u003eWho the M138 is suitable for\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eProfile\u003c\/th\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003cth\u003eReason\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarpenter and custom furniture manufacturer\u003c\/td\u003e\n\u003ctd\u003eSuitable\u003c\/td\u003e\n\u003ctd\u003e9 radii cover everything from ABS edge finishing (R1–R3) to decorative profiles on solid wood (R8–R16)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCraftsman working on worktops, frames and decorative panels\u003c\/td\u003e\n\u003ctd\u003eSuitable\u003c\/td\u003e\n\u003ctd\u003eThe bearing at the tip ensures precise guidance and uniform removal on long, straight edges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperator using a CNC router table\u003c\/td\u003e\n\u003ctd\u003eNot suitable\u003c\/td\u003e\n\u003ctd\u003eThe M138 is designed exclusively for portable handheld routers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e rounding internal edges and inside corners, where the bearing cannot follow the profile — in these cases, use router bits without bearing with a guide bushing or template.\u003c\/p\u003e\n\u003ch3\u003eIGM technology and build quality\u003c\/h3\u003e\n\u003cp\u003eThe micro-grain carbide cutting edges are brazed and sharpened on 5-axis CNC centers with automatic balancing. Hardness is 93.5 HRA, thickness 2 mm with a minimum of 1 mm for reduced-diameter versions. The increased thickness allows multiple resharpening cycles. The red PTFE Teflon coating reduces friction and protects against resins and adhesives. Each router bit passes an automated quality control. The anti-kickback technology complies with the European EN 847 standard.\u003c\/p\u003e\n\u003ch3\u003eTechnical specifications — all variants\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eVersion\u003c\/th\u003e\n\u003cth\u003eRadius R (mm)\u003c\/th\u003e\n\u003cth\u003eShank S (mm)\u003c\/th\u003e\n\u003cth\u003eDiameter D (mm)\u003c\/th\u003e\n\u003cth\u003eLength L (mm)\u003c\/th\u003e\n\u003cth\u003eCutting height I (mm)\u003c\/th\u003e\n\u003cth\u003eØ Bearing B (mm)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eM138 R1 D11.5x9.5 L59\u003c\/td\u003e\u003ctd\u003e1\u003c\/td\u003e\u003ctd\u003e8\u003c\/td\u003e\u003ctd\u003e11.5\u003c\/td\u003e\u003ctd\u003e59\u003c\/td\u003e\u003ctd\u003e9.5\u003c\/td\u003e\u003ctd\u003e9.5\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eM138 R2 D17.34x9.5 L61\u003c\/td\u003e\u003ctd\u003e2\u003c\/td\u003e\u003ctd\u003e6\u003c\/td\u003e\u003ctd\u003e17.34\u003c\/td\u003e\u003ctd\u003e61\u003c\/td\u003e\u003ctd\u003e9.5\u003c\/td\u003e\u003ctd\u003e12.7\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eM138 R2 D17.34x9.5 L61\u003c\/td\u003e\u003ctd\u003e2\u003c\/td\u003e\u003ctd\u003e8\u003c\/td\u003e\u003ctd\u003e17.34\u003c\/td\u003e\u003ctd\u003e61\u003c\/td\u003e\u003ctd\u003e9.5\u003c\/td\u003e\u003ctd\u003e12.7\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eM138 R3 D19.15x9.5 L61\u003c\/td\u003e\u003ctd\u003e3\u003c\/td\u003e\u003ctd\u003e6\u003c\/td\u003e\u003ctd\u003e19.15\u003c\/td\u003e\u003ctd\u003e61\u003c\/td\u003e\u003ctd\u003e9.5\u003c\/td\u003e\u003ctd\u003e12.7\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eM138 R3 D19.15x9.5 L61\u003c\/td\u003e\u003ctd\u003e3\u003c\/td\u003e\u003ctd\u003e8\u003c\/td\u003e\u003ctd\u003e19.15\u003c\/td\u003e\u003ctd\u003e61\u003c\/td\u003e\u003ctd\u003e9.5\u003c\/td\u003e\u003ctd\u003e12.7\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eM138 R6.3 D25.3x12.7 L64\u003c\/td\u003e\u003ctd\u003e6.3\u003c\/td\u003e\u003ctd\u003e8\u003c\/td\u003e\u003ctd\u003e25.3\u003c\/td\u003e\u003ctd\u003e64\u003c\/td\u003e\u003ctd\u003e12.7\u003c\/td\u003e\u003ctd\u003e12.7\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eM138 R8 D28.7x12.7 L64\u003c\/td\u003e\u003ctd\u003e8\u003c\/td\u003e\u003ctd\u003e8\u003c\/td\u003e\u003ctd\u003e28.7\u003c\/td\u003e\u003ctd\u003e64\u003c\/td\u003e\u003ctd\u003e12.7\u003c\/td\u003e\u003ctd\u003e12.7\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eM138 R9.5 D31.7x15.88 L68\u003c\/td\u003e\u003ctd\u003e9.5\u003c\/td\u003e\u003ctd\u003e8\u003c\/td\u003e\u003ctd\u003e31.7\u003c\/td\u003e\u003ctd\u003e68\u003c\/td\u003e\u003ctd\u003e15.88\u003c\/td\u003e\u003ctd\u003e12.7\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eM138 R12 D36.7x19 L71\u003c\/td\u003e\u003ctd\u003e12\u003c\/td\u003e\u003ctd\u003e8\u003c\/td\u003e\u003ctd\u003e36.7\u003c\/td\u003e\u003ctd\u003e71\u003c\/td\u003e\u003ctd\u003e19\u003c\/td\u003e\u003ctd\u003e12.7\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eM138 R16 D44.7x22 L74\u003c\/td\u003e\u003ctd\u003e16\u003c\/td\u003e\u003ctd\u003e8\u003c\/td\u003e\u003ctd\u003e44.7\u003c\/td\u003e\u003ctd\u003e74\u003c\/td\u003e\u003ctd\u003e22\u003c\/td\u003e\u003ctd\u003e12.7\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCommon specifications for all versions\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eNumber of cutting edges (Z)\u003c\/td\u003e\u003ctd\u003e2\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eGeometry\u003c\/td\u003e\u003ctd\u003eStraight cutting edge\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eRotation\u003c\/td\u003e\u003ctd\u003eClockwise, right-hand rotation\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eCutting edge material\u003c\/td\u003e\u003ctd\u003eMicro-grain HW carbide\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eCutting edge hardness\u003c\/td\u003e\u003ctd\u003e93.5 HRA\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eCutting edge thickness\u003c\/td\u003e\u003ctd\u003e2 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eCoating\u003c\/td\u003e\u003ctd\u003eRed PTFE Teflon\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eAnti-kickback\u003c\/td\u003e\u003ctd\u003eYes, compliant with EN 847\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eGuide bearing\u003c\/td\u003e\u003ctd\u003eIncluded, positioned at the tip\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eShank marking\u003c\/td\u003e\u003ctd\u003eLaser: code, D, I, S, max RPM, K point\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003ePackaging\u003c\/td\u003e\u003ctd\u003eResealable case with specification label\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eWorkable materials\u003c\/td\u003e\u003ctd\u003eSoftwood and hardwood, plywood, DTD, MDF, laminate, plastic, artificial stone\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eUse\u003c\/td\u003e\u003ctd\u003eHandheld routers only\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhich radius should I choose for finishing ABS edging on kitchen doors?\u003c\/h3\u003e\n\u003cp\u003eFor finishing the sharp edge left by the automatic edge bander on ABS edging, the smallest radii are used: R1 mm for a barely noticeable rounding and R2 mm for a slightly softer profile. R3 mm is the maximum recommended radius on standard 1–2 mm ABS edging without risking cutting into the underlying panel.\u003c\/p\u003e\n\u003ch3\u003eWhat is the difference between the 6 mm and 8 mm shank versions?\u003c\/h3\u003e\n\u003cp\u003eThe R2 and R3 versions are available with both shank sizes. The 6 mm shank is compatible with light and compact handheld routers with a 6 mm collet. The 8 mm shank offers greater rigidity and is preferred on medium- and high-power routers. All other versions are available only with an 8 mm shank.\u003c\/p\u003e\n\u003ch3\u003eIs the bearing positioned at the tip or on the shank?\u003c\/h3\u003e\n\u003cp\u003eIn the M138 series, the bearing is positioned at the tip, below the cutting edges. This position allows the bit to be guided along the lower edge of the workpiece, with the bearing resting on the panel face or on the already trimmed edge. To work with fixed templates above the workpiece, a router bit with a bearing on the shank is required, such as the M107 series.\u003c\/p\u003e\n\u003ch3\u003eDoes the bit also work on artificial stone and plastic?\u003c\/h3\u003e\n\u003cp\u003eYes. The micro-grain HW cutting edges with PTFE Teflon coating are compatible with plastic and artificial stone, such as Corian and similar materials. PTFE reduces material build-up on the cutting edges when machining synthetic surfaces. For artificial stone, a lower speed than for wood and light passes are recommended to preserve the cutting edges.\u003c\/p\u003e\n\u003ch3\u003eCan the router bit be resharpened?\u003c\/h3\u003e\n\u003cp\u003eYes. The HW cutting edges are 2 mm thick, sufficient for multiple resharpening cycles. For reduced-diameter versions (R1), the minimum thickness is 1 mm. Resharpening is recommended at a specialized center to maintain the correct rounded profile and original balance.\u003c\/p\u003e\n\u003ch3\u003eWhat are the recommended maximum RPM values for larger-diameter versions?\u003c\/h3\u003e\n\u003cp\u003eThe maximum RPM values are specific to each version and are laser-marked on the shank. Larger-diameter versions (R12 D36.7 mm and R16 D44.7 mm) require lower RPM than smaller versions to maintain the correct peripheral cutting speed. Always check the marking on the shank before use.\u003c\/p\u003e","brand":"igm","offers":[{"title":"R1 mm \/ Ø 11.5 mm \/ Altezza taglio 9.5 mm \/ Gambo 8 mm","offer_id":53174335537480,"sku":"M138-01081","price":29.81,"currency_code":"EUR","in_stock":true},{"title":"R2 mm \/ Ø 17.34 mm \/ Altezza taglio 9.5 mm \/ Gambo 6 mm","offer_id":53174335570248,"sku":"M138-02061","price":32.92,"currency_code":"EUR","in_stock":true},{"title":"R2 mm \/ Ø 17.34 mm \/ Altezza taglio 9.5 mm \/ Gambo 8 mm","offer_id":53174335603016,"sku":"M138-02081","price":32.92,"currency_code":"EUR","in_stock":true},{"title":"R3 mm \/ Ø 19.15 mm \/ Altezza taglio 9.5 mm \/ Gambo 6 mm","offer_id":53174335635784,"sku":"M138-03061","price":32.92,"currency_code":"EUR","in_stock":true},{"title":"R3 mm \/ Ø 19.15 mm \/ Altezza taglio 9.5 mm \/ Gambo 8 mm","offer_id":53174335668552,"sku":"M138-03081","price":32.92,"currency_code":"EUR","in_stock":true},{"title":"R6.3 mm \/ Ø 25.3 mm \/ Altezza taglio 12.7 mm \/ Gambo 8 mm","offer_id":53174335701320,"sku":"M138-06381","price":41.05,"currency_code":"EUR","in_stock":true},{"title":"R8 mm \/ Ø 28.7 mm \/ Altezza taglio 12.7 mm \/ Gambo 8 mm","offer_id":53174335734088,"sku":"M138-08081","price":43.28,"currency_code":"EUR","in_stock":true},{"title":"R9.5 mm \/ Ø 31.7 mm \/ Altezza taglio 15.88 mm \/ Gambo 8 mm","offer_id":53174335766856,"sku":"M138-09581","price":49.92,"currency_code":"EUR","in_stock":true},{"title":"R12 mm \/ Ø 36.7 mm \/ Altezza taglio 19 mm \/ Gambo 8 mm","offer_id":53174335799624,"sku":"M138-12081","price":51.0,"currency_code":"EUR","in_stock":true},{"title":"R16 mm \/ Ø 44.7 mm \/ Altezza taglio 22 mm \/ Gambo 8 mm","offer_id":53174335832392,"sku":"M138-16081","price":66.24,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0891\/2139\/0920\/files\/Progettosenzatitolo_37.jpg?v=1779787536","url":"https:\/\/www.krollit.com\/products\/fresa-igm-m138-per-arrotondare-bordi","provider":"Krollit","version":"1.0","type":"link"}