45° face mills (KM12, KM12-AL) have a thinner chip and lower cutting force, ideal for aluminum and unstable setups. The 45° edge leaves a small chamfer on the workpiece that often doesn't require a finishing pass. 90° face mills (BAP 300R/400R, AP, RAP) produce a square shoulder in one pass and are used when shoulder quality matters. Choose 45° for general face milling aluminum, 90° for square shoulder on steel and cast iron.

High-feed face milling uses 10-15° lead angle inserts (LOGU 030310ER-GM) to achieve very high feed per tooth (0.5-1.5 mm/tooth vs 0.1-0.3 mm/tooth for standard face mill). The shallow lead angle creates a thin chip at high feed rate, which is more efficient for roughing large surfaces. Typical applications: roughing steel die molds, large cast iron housings, and high-volume steel plate facing.

Yes — within a series, the same insert specification fits multiple cutter diameters. For example, BAP 400R series uses APMT 1604 inserts for all diameters (50mm, 63mm, 80mm, 100mm, 125mm, etc.). The cutter body's diameter changes, but the insert pocket is the same. This simplifies insert inventory — stock one insert grade and use across the entire diameter range.

Both are 45° aluminum face mill bodies, but KM12-AL is aluminum-specific with a polished sharp edge for non-ferrous materials. KM12 (without -AL suffix) has a slightly stronger edge preparation for harder non-ferrous or light steel. For pure aluminum 6061/7075, use KM12-AL. For cast aluminum or light steel, use KM12.

A face mill arbor is the spindle-side holder that grips the face mill body via the central bore. Common arbors have 16mm / 22mm / 27mm / 32mm / 40mm / 60mm bores on the cutter side, and HSK / BT / CAT / R8 tapers on the spindle side. The cutter bore must match the arbor pilot diameter. For most 50-100mm face mills, a 22mm bore arbor works.

Yes. BEYOND offers custom face mill body manufacturing for non-standard diameters or bores, with a 3-piece MOQ and 3-4 week lead time. Common custom requests include 70mm, 110mm, 140mm, 175mm diameters, or special bore sizes (e.g., 19mm, 25.4mm, 31.75mm imperial). Contact sales at chao@cnchome-beyond.com or WhatsApp +86 15990663752 for a custom quote.