FBD-202-12-TC

True 180° flat-bottom drilling — burr-free intersecting, angled and shoulder holes

• True 180° flat tip with a small corner radius (0.005" on 1/8" dia up to 0.02" on 5/16"–1/2") for burr-free intersecting holes, shoulder drilling, angled holes and flat-bottom guide holes
• Two lengths: FBD-201 short (2x diameter) and FBD-202 deep (5x diameter), each in six sizes from 1/8" to 1/2" diameter
• Aluminum version (pg 74): sharp edge, available uncoated, DLC coated, thru-coolant, and thru-coolant DLC; for aluminum, plastics and wood at 500–1000 SFM (2x) / 250–500 SFM (5x)
• Steel version (pg 98): T-Process honed edge with AlTiN (aluminum titanium nitride) coating (-TP-A) for cast iron, steel, stainless and super alloys — 200–350 SFM in mild steel/gray cast iron down to 60–90 SFM in 6Al4V titanium, Inconel, 13-8/17-4 SS and 440C
• Always start the hole with the short 2x FBD-201 before finishing depth with the 5x FBD-202 to prevent walking; spot drill first if the drill walks on flat surfaces
• On angled surfaces up to 30°, reduce feed (IPR) to 50%; beyond 30° or on curved/partial holes, reduce feed to 30% and RPM to 70% of recommended
• Thru-coolant versions recommended for FBD-202 (5x) deep holes and whenever chip packing occurs; pecking helps if thru coolant is unavailable
• Max hole depth published per size: e.g. 1/4" FBD-201 = 1/2" deep, 1/4" FBD-202 = 1-1/4" deep; 1/2" FBD-202 = 2-1/2" deep
• Series tolerances: cutting dia +0.000/−0.001", shank dia −0.0001/−0.0002", flute length +0.060/−0.000", OAL ±0.060"

From the RobbJack Applications Guide.