Reamer Taper Pin 6 L.H. UTLR-255401

Best results are obtained if hole is pre-drilled a few thousandths smaller than the small diameter of the finished reamed hole. Left hand Helix RH cut pushes chips forward in thru hole reaming Ream two-thirds the speed of drilling and Feed at 200%-300% higher than drilling to prevent chatter and reamer wear. on a 1-1/2 hole. Keep reamer chamfers ground accurately. 6 Flutes Reamer Taper Pin for Flush or Protruding Head Fasteners Aim for perfect alignment of the Spindle, Reamer, Bushing and hole to be machined. SEQUENCE FOR TWO STEP DRILL/REAM USING POSITIVE FEED EQUIP- STEP 2. TAPER REAM AND COUNTERSINK: See ‘Taper Lock Equip- STEP 3. BEARING PROBE: Use UDB 756072 Series. See ‘Bearing Check’ section for applicable values, based on fastener size and group. STEP 4. HAND REAMING: Finish ream tapered holes by hand reaming with multi-fluted tapered reamer. When hand reaming, alternate straight and STEP 6. PROTRUSION CHECK: For TL200 Series, use UDB 755620 See below for Protruding Head or previous page for Flush Head Fasteners and Hole Preparations.