• 3D Printing Additive MFG
  • Markforged 3D Printers
  • Markforged Materials
  • Markforged Spare Parts
• CNC Machines in Stock
  • DN Solutions
• Industrial Lubricants
  • Cleaners & Degreasers
  • Cutting & Grinding Fluids
  • Forming Lubricants
  • Greases
  • Hydraulic Oils
  • Slideway Oils
• Machine Accessories
  • Barfeeders
  • Barpullers
  • Filter Mist Collectors
  • Measuring Probes
    • Basemaster Toolsetting Probes
    • Pointmaster Worksetting Probes
• Metrology
  • Magnetic Base Stands
  • Thread Plug Gauges
  • Thread Ring Gauges
    • GO
    • NO GO
• Tooling
  • Broaching
    • PH Horn Type SH117
  • CK Boring System
    • BIG Kaiser EWN Finish Boring Heads
    • BIG Kaiser RW Rough Boring Heads
  • Counterbores
  • Countersinks
    • Countersink Sets
    • Guhring Spyrotec High Performance Countersinks
  • Drills
    • Carbide Drills
      • RT100T (Universal Long Series)
      • RT100U (Universal)
      • RT100VA (Stainless)
    • Centre Drills
    • Drill Sets
      • HSS TiN End Coated
      • HSS Uncoated
    • Guhring HT800WP Insert Drills
    • Jobber Length Drills
    • Long Twist Drills
    • Morse Taper Drills
    • NC Spotting Drills
    • Step Power Drill
    • Stub Drills
    • Sumitomo SMD Insert Drills
      • SMD Drill Bodies - 1.5xD
      • SMD Drill Bodies - 12xD
      • SMD Drill Bodies - 3xD
      • SMD Drill Bodies - 5xD
      • SMD Drill Bodies - 8xD
      • SMD Drill Inserts
    • Sumitomo WDX U Drills
  • Endmills
    • Carbide
      • 1 Flute
        • Aluminium/Non-Ferrous/Plastics
      • 2 Flute
        • Aluminium/Non-Ferrous/Plastics
      • 2 Flute Ballnose
        • Aluminium/Non-Ferrous/Plastics
        • Pre-Hardened/Hardened Steel
        • Universal - All Materials
      • 3 Flute
        • Aluminium/Non-Ferrous/Plastics
        • Universal - All Materials
      • 4 Flute
        • Stainless Steel
        • Universal - All Materials
      • 4 Flute Ballnose
        • Universal - All Materials
      • 6, 8, 10 Flute
        • Universal - All Materials
      • Chamfering/Deburring
        • Universal - All Materials
      • Endmill Sets
        • Universal - All Materials
      • High Feed
      • Reflex Corner Rounding
      • RIB Processing
        • Universal - All Materials
    • HSS M42
      • 2 Flute
        • Universal - All Materials
  • Grooving & Part Off
    • PH Horn S100 Part Off System
    • Sumitomo GND Series - External & Internal
      • GND External Toolholders
      • GND Face Grooving Toolholders
      • GND Inserts
        • For Grooving & Parting Off
        • For Grooving & Traverse Machining
        • For Parting Off only
        • For Profiling (Radius)
        • For Profiling & Necking
      • GND Internal Toolholders
  • Milling Bodies & Inserts
    • BIG Fullcut 90 Degree 2 Edge Insert
      • FCM Type (Non Ramping)
    • Korloy RM3 90 Degree 3 Edge Insert
      • RM3 3000 Series (6mm Insert)
      • RM3 4000 Series (8mm Insert)
    • Sumitomo DFC 90 Degree 6 Edge Insert
      • DFC 09000 Series
    • Sumitomo RSE Button Insert
      • RSE 10000 Series
      • RSE 12000 Series
    • Sumitomo RSX Button Insert
      • RSX 08000 Series
      • RSX 10000 Series
      • RSX 12000 Series
      • RSX 16000 Series
      • RSX 20000 Series
      • RSX08000 Series (8mm Insert)
      • RSX10000 Series (10mm Insert)
      • RSX12000 Series (12mm Insert)
    • Sumitomo WAX Aluminium 2 Edge Insert
      • WAX 3000 Series (16mm Insert)
      • WAX 4000 Series (22mm Insert)
    • Sumitomo WEX 90 Degree 2 Edge Insert
      • WEX2000 Series (12mm Insert)
      • WEX3000 Series (17mm Insert)
    • Sumitomo WEZ 90 Degree 2 Edge Insert
      • WEZ 11000 Series (11mm Insert)
      • WEZ 17000 Series (17mm Insert)
      • WEZ11000 Series (11mm Insert)
      • WEZ17000 Series (17mm Insert)
    • Sumitomo WFX 90 Degree 4 Edge Insert
      • WFX 08000 Series
      • WFX 12000 Series
    • Sumitomo WFXH High Feed 4 Edge Insert
      • WFXH 08000 Series
      • WFXH 12000 Series
    • Sumitomo WGX 45 Degree 4 Edge Insert
      • WGX 13000 Series
    • Sumitomo WRCX Button Insert
      • WRCX 08000 Series
      • WRCX 10000 Series
      • WRCX 12000 Series
      • WRCX 16000 Series
      • WRCX 20000 Series
  • Milling Holders
    • BIG Daishowa Mega Micro Series
      • Mega Micro Collets
    • BIG Daishowa Mega New Baby Series
      • MEGA New Baby Collets
    • Drill Chucks
    • ER Collet System
      • ER Collets
    • Facemill Arbours
    • Sidelock Holders
      • BT Sidelocks
  • Reamers
  • Taps
    • BSP
      • Gun Nose (Through Hole)
        • Gold Band - Powertap (Universal)
      • Spiral Flute (Blind Hole)
        • Gold Band - Powertap (Universal)
    • Hand Taps - Metric
    • Metric
      • Gun Nose (Through Hole)
        • Black Band (Aluminium)
        • Blue Band (Stainless)
        • Red Band (Tool Steel)
        • Universal - All Materials
      • Roll Tap (Threadforming)
      • Spiral Flute (Blind Hole)
        • Black Band (Aluminium)
        • Blue Band (Stainless)
        • Red Band (Tool Steel)
        • Universal - All Materials
    • Metric Fine
      • Gun Nose (Through Hole)
        • Gold Band - Powertap (Universal)
      • Spiral Flute (Blind Hole)
        • Gold Band - Powertap (Universal)
    • Metric Long Series
      • Gun Nose (Through Hole)
        • Green Band (Universal)
      • Spiral Flute (Blind Hole)
        • Gold Band - Powertap (Universal)
    • UNC
      • Gun Nose (Through Hole)
        • Universal - All Materials
      • Roll Tap (Threadforming)
      • Spiral Flute (Blind Hole)
        • Universal - All Materials
    • UNF
      • Gun Nose (Through Hole)
        • Universal - All Materials
      • Spiral Flute (Blind Hole)
        • Universal - All Materials
  • Threading
    • ISO External Threading
    • ISO Internal Threading
    • Volkel V-Coil Thread Repair System
      • V-Coil Thread Repair Kits
      • Wire Thread Inserts - Type S
  • Threadmills
    • PH Horn Inserted Threadmills
      • System 306/606
    • Solid Carbide
  • Toolholders - Turning
    • Boring Bars - Carbide
      • For CC-- Inserts
      • For CP-- Inserts
      • For DC-- Inserts
      • For SP-- Inserts
      • For TB-- Inserts
      • For TP-- Inserts
      • For VB-- Inserts
      • For WB-- Inserts
    • Boring Bars - Carbide - Through Coolant
      • For CC-- Inserts
      • For TP-- Inserts
    • Boring Bars - Steel
      • For CC-- Inserts
      • For CN-- Inserts
      • For CP-- Inserts
      • For DC-- Inserts
      • For DN-- Inserts
      • For SC-- Inserts
      • For SN-- Inserts
      • For SP-- Inserts
      • For TB-- Inserts
      • For TN-- Inserts
      • For TP-- Inserts
      • For VB-- Inserts
      • For VC-- Inserts
      • For WB-- Inserts
      • For WN-- Inserts
      • For WP-- Inserts
    • Boring Bars - Steel - Anti Vibration
      • For CC-- Inserts
      • For CN-- Inserts
      • For CP-- Inserts
      • For DC-- Inserts
      • For TN-- Inserts
      • For TP-- Inserts
      • For VB-- Inserts
    • Boring Bars - Steel - Anti Vibration - Through Coo
      • For CN-- Inserts
      • For CP-- Inserts
      • For DN-- Inserts
      • For TN-- Inserts
      • For TP-- Inserts
      • For WN-- Inserts
    • Boring Bars - Steel - Through Coolant
      • For CC-- Inserts
      • For CP-- Inserts
      • For DC-- Inserts
      • For TP-- Inserts
      • For VC-- Inserts
    • External Toolholders
      • For CC-- Inserts
      • For CN-- Inserts
      • For DC-- Inserts
      • For DN-- Inserts
      • For RC-- Inserts
      • For SN-- Inserts
      • For TC-- Inserts
      • For TN-- Inserts
      • For VC-- Inserts
      • For VN-- Inserts
      • For WN-- Inserts
  • Turning Inserts
    • For Aluminium
      • H1 - For General Purpose Cutting
    • For Cast Iron Materials
      • AC4010K - 1st Choice for Grey Cast Iron
      • AC4015K - 1st Choice for Ductile Iron
      • AC4125K - For Heavy Interupted Cutting
      • NB90S - Ceramic for High Speed Cutting of Cast Iro
    • For Exotic Materials
      • AC5005S - For High Speed Continuous Cutting
      • AC5015S - 1st Choice for General Purpose Cutting
      • AC5025S - For Interupted Cutting
      • AC520U - For General / Interupted Cutting
    • For Hardened Steel
      • AC503U - For Finish Turning of Hardened Steel
    • For Stainless Steel Materials
      • AC6020M - For High Speed Continuous Cutting
      • AC6030M - For General Purpose Machining
      • AC6040M - For Heavy Interupted Cutting
    • For Steel Materials
      • AC8015P - For High Speed Continuous Machining
      • AC8020P - For High Efficiency Machining
      • AC8025P - For General Purpose Machining
      • AC8035P - For Heavy Interupted Cutting
      • T1500A - Uncoated Cermet for General Purpose Cutti
• Workholding
  • HWR Spanntechnik
    • INOFlex Compensating 4 Jaw Chucks
    • Replacement Parts
      • Replacement Cover Plates
      • Replacement Jaw Sets
    • SOLIDBolt / SOLIDBolt Max
      • SOLIDBolt 96/52 Risers
      • SOLIDBolt Accessories
      • SOLIDBolt Grid Plates
    • SOLIDChuck
    • SOLIDClean
    • SOLIDGrip Self Centering Vices
    • SOLIDPoint Zero Point Plates
      • SOLIDPoint 52
      • SOLIDPoint 96
      • SOLIDPoint 96/52
      • SOLIDPoint Accessories
    • SOLIDStamp
  • Kurt Machine Vices
  • MiTee Bite Workholding
  • Royal Quick-Grip Collet Chucks
    • QG-42 Quick-Grip Collets
    • QG-52 Quick-Grip Collets
    • QG-65 Quick-Grip Collets
    • QG-80 Quick-Grip Collets
  • Samchully Hydraulic Chucks

AC503U - For Finish Turning of Hardened Steel