Offset Inner Channel Tungsten Carbide Electrodes

The Blind Hole Dilemma

Tungsten carbide, with its capability to drill through the hardest materials found in electrical discharge machining applications, has a major weakness. Unlike materials such as brass and copper, the methods required to manufacture tungsten carbide electrodes make it practically impossible to manufacture multi-channel electrodes. Drilling blind holes (holes not drilled entirely through a workpiece) with single hole electrodes leaves a nipple (AKA slug) of unburned material at the bottom of the hole, and the absence of multi-channel tungsten carbide electrodes leaves machinists seemingly without options when attempting to drill blind holes in the toughest materials.

The Solution

Fortunately, there is a clever solution to this dilemma. Tungsten carbide electrodes can be manufactured with an offset inner-channel, and just as with a multi-channel electrodes, all material in the center of the electrode is burned away evenly as the electrode rotates. This simple channel design achieves perfectly drilled blind holes, while working around the manufacturing constraints of tungsten carbide.

As with all of our other electrodes, we offer a high degree of customizability. Our offset inner-channel tungsten carbide tubes are available in a variety of lengths, while the distance of the inner channel from the center of the electrode is fully adjustable. The introduction of offset inner-channel tungsten carbide electrodes represents the resolution of tungsten carbide’s only major gap in application. Whether drilling through or blind, tungsten carbide is the material of choice for drilling into the toughest materials.

Characteristics

  • The off-center inner-channel configuration confers the same drilling characteristics as a multi-channel electrode.
  • Perfectly suited to drilling blind holes.
  • Lengths and outer diameters of electrodes are fully customizable.
  • Our offset-channel tungsten carbide electrodes are available in lengths from 2” (50 mm) to 12” (300 mm).

Product Description

Please note that the following parts list is not representative of our entire electrode selection. This list is meant to be used as much for reference as for actual purchasing, and represents a range, rather than a comprehensive list, of the products we offer. If the dimensions of a desired electrode are not found on this list, but lie between listed dimensions, we are capable of manufacturing it.

Outer Diameter

Length

MOQ

0.10mm / .0039″

300mm / 12″

10 Pieces


0.11mm / .0043″

300mm / 12″

10 Pieces


0.12mm / .0047″

300mm / 12″

10 Pieces


0.13mm / .0051″

300mm / 12″

10 Pieces


0.14mm / .0055″

300mm / 12″

10 Pieces


0.15mm / .0059″

300mm / 12″

10 Pieces


0.16mm / .0063″

300mm / 12″

10 Pieces


0.17mm / .0067″

300mm / 12″

10 Pieces


0.18mm / .0071″

300mm / 12″

10 Pieces


0.19mm / .0074″

300mm / 12″

10 Pieces


0.20mm / .0079″

300mm / 12″

10 Pieces


0.21mm / .0083″

300mm / 12″

10 Pieces


0.22mm / .0087″

300mm / 12″

10 Pieces


0.23mm / .0091″

300mm / 12″

10 Pieces


0.24mm / .0094″

300mm / 12″

10 Pieces


0.25mm / .0098″

300mm / 12″

10 Pieces


0.26mm / .0102″

300mm / 12″

10 Pieces


0.27mm / .0106″

300mm / 12″

10 Pieces


0.28mm / .0110″

300mm / 12″

10 Pieces


0.29mm / .0114″

300mm / 12″

10 Pieces


0.30mm / .0118″

300mm / 12″

10 Pieces


0.31mm / .0122″

300mm / 12″

10 Pieces


0.32mm / .0126″

300mm / 12″

10 Pieces


0.33mm / .0130″

300mm / 12″

10 Pieces


0.34mm / .0134″

300mm / 12″

10 Pieces


0.35mm / .0138″

300mm / 12″

10 Pieces


0.36mm / .0142″

300mm / 12″

10 Pieces


0.37mm / .0146″

300mm / 12″

10 Pieces


0.38mm / .0150″

300mm / 12″

10 Pieces


0.39mm / .0154″

300mm / 12″

10 Pieces


0.40mm / .0157″

300mm / 12″

10 Pieces


0.41mm / .0161″

300mm / 12″

10 Pieces


0.42mm / .0165″

300mm / 12″

10 Pieces


0.43mm / .0169″

300mm / 12″

10 Pieces


0.44mm / .0173″

300mm / 12″

10 Pieces


0.45mm / .0177″

300mm / 12″

10 Pieces


0.46mm / .0181″

300mm / 12″

10 Pieces


0.47mm / .0185″

300mm / 12″

10 Pieces


0.48mm / .0189″

300mm / 12″

10 Pieces


0.49mm / .0193″

300mm / 12″

10 Pieces


0.50mm / .0197″

300mm / 12″

10 Pieces


0.51mm / .0201″

300mm / 12″

10 Pieces


0.52mm / .0205″

300mm / 12″

10 Pieces


0.53mm / .0209″

300mm / 12″

10 Pieces


0.54mm / .0213″

300mm / 12″

10 Pieces


0.55mm / .0217″

300mm / 12″

10 Pieces


0.56mm / .0220″

300mm / 12″

10 Pieces


0.57mm / .0224″

300mm / 12″

10 Pieces


0.58mm / .0228″

300mm / 12″

10 Pieces


0.59mm / .0232″

300mm / 12″

10 Pieces


0.60mm / .0236″

300mm / 12″

10 Pieces


0.61mm / .0240″

300mm / 12″

10 Pieces


0.62mm / .0244″

300mm / 12″

10 Pieces


0.63mm / .0248″

300mm / 12″

10 Pieces


0.64mm / .0252″

300mm / 12″

10 Pieces


0.65mm / .0256″

300mm / 12″

10 Pieces


0.66mm / .0260″

300mm / 12″

10 Pieces


0.67mm / .0264″

300mm / 12″

10 Pieces


0.68mm / .0268″

300mm / 12″

10 Pieces


0.69mm / .0272″

300mm / 12″

10 Pieces


0.70mm / .0276″

300mm / 12″

10 Pieces


0.71mm / .0280″

300mm / 12″

10 Pieces


0.72mm / .0283″

300mm / 12″

10 Pieces


0.73mm / .0287″

300mm / 12″

10 Pieces


0.74mm / .0291″

300mm / 12″

10 Pieces


0.75mm / .0295″

300mm / 12″

10 Pieces


0.76mm / .0299″

300mm / 12″

10 Pieces


0.77mm / .0303″

300mm / 12″

10 Pieces


0.78mm / .0307″

300mm / 12″

10 Pieces


0.79mm / .0311″

300mm / 12″

10 Pieces


0.80mm / .0315″

300mm / 12″

10 Pieces


0.81mm / .0319″

300mm / 12″

10 Pieces


0.82mm / .0323″

300mm / 12″

10 Pieces


0.83mm / .0327″

300mm / 12″

10 Pieces


0.84mm / .0331″

300mm / 12″

10 Pieces


0.85mm / .0335″

300mm / 12″

10 Pieces


0.86mm / .0339″

300mm / 12″

10 Pieces


0.87mm / .0343″

300mm / 12″

10 Pieces


0.88mm / .0346″

300mm / 12″

10 Pieces


0.89mm / .0350″

300mm / 12″

10 Pieces


0.90mm / .0354″

300mm / 12″

10 Pieces


0.91mm / .0358″

300mm / 12″

10 Pieces


0.92mm / .0362″

300mm / 12″

10 Pieces


0.93mm / .0366″

300mm / 12″

10 Pieces


0.94mm / .0370″

300mm / 12″

10 Pieces


0.95mm / .0374″

300mm / 12″

10 Pieces


0.96mm / .0378″

300mm / 12″

10 Pieces


0.97mm / .0382″

300mm / 12″

10 Pieces


0.98mm / .0386″

300mm / 12″

10 Pieces


0.99mm / .0390″

300mm / 12″

10 Pieces


1.00mm / .0394″

300mm / 12″

10 Pieces


1.01mm / .0398″

300mm / 12″

10 Pieces


1.02mm / .0402″

300mm / 12″

10 Pieces


1.03mm / .0406″

300mm / 12″

10 Pieces


1.04mm / .0409″

300mm / 12″

10 Pieces


1.05mm / .0413″

300mm / 12″

10 Pieces


1.06mm / .0417″

300mm / 12″

10 Pieces


1.07mm / .0421″

300mm / 12″

10 Pieces


1.08mm / .0425″

300mm / 12″

10 Pieces


1.09mm / .0429″

300mm / 12″

10 Pieces


1.10mm / .0433″

300mm / 12″

10 Pieces


1.11mm / .0437″

300mm / 12″

10 Pieces


1.12mm / .0441″

300mm / 12″

10 Pieces


1.13mm / .0445″

300mm / 12″

10 Pieces


1.14mm / .0449″

300mm / 12″

10 Pieces


1.15mm / .0453″

300mm / 12″

10 Pieces


1.16mm / .0457″

300mm / 12″

10 Pieces


1.17mm / .0461″

300mm / 12″

10 Pieces


1.18mm / .0465″

300mm / 12″

10 Pieces


1.19mm / .0469″

300mm / 12″

10 Pieces


1.20mm / .0472″

300mm / 12″

10 Pieces


1.21mm / .0476″

300mm / 12″

10 Pieces


1.22mm / .0480″

300mm / 12″

10 Pieces


1.23mm / .0484″

300mm / 12″

10 Pieces


1.24mm / .0488″

300mm / 12″

10 Pieces


1.25mm / .0492″

300mm / 12″

10 Pieces


1.26mm / .0496″

300mm / 12″

10 Pieces


1.27mm / .0500″

300mm / 12″

10 Pieces


1.28mm / .0504″

300mm / 12″

10 Pieces


1.29mm / .0508″

300mm / 12″

10 Pieces


1.30mm / .0512″

300mm / 12″

10 Pieces


1.31mm / .0516″

300mm / 12″

10 Pieces


1.32mm / .0520″

300mm / 12″

10 Pieces


1.33mm / .0524″

300mm / 12″

10 Pieces


1.34mm / .0528″

300mm / 12″

10 Pieces


1.35mm / .0531″

300mm / 12″

10 Pieces


1.36mm / .0535″

300mm / 12″

10 Pieces


1.37mm / .0539″

300mm / 12″

10 Pieces


1.38mm / .0543″

300mm / 12″

10 Pieces


1.39mm / .0547″

300mm / 12″

10 Pieces


1.40mm / .0551″

300mm / 12″

10 Pieces


1.41mm / .0555″

300mm / 12″

10 Pieces


1.42mm / .0559″

300mm / 12″

10 Pieces


1.43mm / .0563″

300mm / 12″

10 Pieces


1.44mm / .0567″

300mm / 12″

10 Pieces


1.45mm / .0571″

300mm / 12″

10 Pieces


1.46mm / .0575″

300mm / 12″

10 Pieces


1.47mm / .0579″

300mm / 12″

10 Pieces


1.48mm / .0583″

300mm / 12″

10 Pieces


1.49mm / .0587″

300mm / 12″

10 Pieces


1.50mm / .0591″

300mm / 12″

10 Pieces


1.51mm / .0594″

300mm / 12″

10 Pieces


1.52mm / .0598″

300mm / 12″

10 Pieces


1.53mm / .0602″

300mm / 12″

10 Pieces


1.54mm / .0606″

300mm / 12″

10 Pieces


1.55mm / .0610″

300mm / 12″

10 Pieces


1.56mm / .0614″

300mm / 12″

10 Pieces


1.57mm / .0618″

300mm / 12″

10 Pieces


1.58mm / .0622″

300mm / 12″

10 Pieces


1.59mm / .0626″

300mm / 12″

10 Pieces


1.60mm / .0630″

300mm / 12″

10 Pieces


1.61mm / .0634″

300mm / 12″

10 Pieces


1.62mm / .0638″

300mm / 12″

10 Pieces


1.63mm / .0642″

300mm / 12″

10 Pieces


1.64mm / .0646″

300mm / 12″

10 Pieces


1.65mm / .0650″

300mm / 12″

10 Pieces


1.66mm / .0654″

300mm / 12″

10 Pieces


1.67mm / .0657″

300mm / 12″

10 Pieces


1.68mm / .0661″

300mm / 12″

10 Pieces


1.69mm / .0665″

300mm / 12″

10 Pieces


1.70mm / .0669″

300mm / 12″

10 Pieces


1.71mm / .0673″

300mm / 12″

10 Pieces


1.72mm / .0677″

300mm / 12″

10 Pieces


1.73mm / .0681″

300mm / 12″

10 Pieces


1.74mm / .0685″

300mm / 12″

10 Pieces


1.75mm / .0689″

300mm / 12″

10 Pieces


1.76mm / .0693″

300mm / 12″

10 Pieces


1.77mm / .0697″

300mm / 12″

10 Pieces


1.78mm / .0701″

300mm / 12″

10 Pieces


1.79mm / .0705″

300mm / 12″

10 Pieces


1.80mm / .0709″

300mm / 12″

10 Pieces


1.81mm / .0713″

300mm / 12″

10 Pieces


1.82mm / .0717″

300mm / 12″

10 Pieces


1.83mm / .0720″

300mm / 12″

10 Pieces


1.84mm / .0724″

300mm / 12″

10 Pieces


1.85mm / .0728″

300mm / 12″

10 Pieces


1.86mm / .0732″

300mm / 12″

10 Pieces


1.87mm / .0736″

300mm / 12″

10 Pieces


1.88mm / .0740″

300mm / 12″

10 Pieces


1.89mm / .0744″

300mm / 12″

10 Pieces


1.90mm / .0748″

300mm / 12″

10 Pieces


1.91mm / .0752″

300mm / 12″

10 Pieces


1.92mm / .0756″

300mm / 12″

10 Pieces


1.93mm / .0760″

300mm / 12″

10 Pieces


1.94mm / .0764″

300mm / 12″

10 Pieces


1.95mm / .0768″

300mm / 12″

10 Pieces


1.96mm / .0772″

300mm / 12″

10 Pieces


1.97mm / .0776″

300mm / 12″

10 Pieces


1.98mm / .0780″

300mm / 12″

10 Pieces


1.99mm / .0783″

300mm / 12″

10 Pieces


2.00mm / .0787″

300mm / 12″

10 Pieces


2.01mm / .0791″

300mm / 12″

10 Pieces


2.02mm / .0795″

300mm / 12″

10 Pieces


2.03mm / .0799″

300mm / 12″

10 Pieces


2.04mm / .0803″

300mm / 12″

10 Pieces


2.05mm / .0807″

300mm / 12″

10 Pieces


2.06mm / .0811″

300mm / 12″

10 Pieces


2.07mm / .0815″

300mm / 12″

10 Pieces


2.08mm / .0819″

300mm / 12″

10 Pieces


2.09mm / .0823″

300mm / 12″

10 Pieces


2.10mm / .0827″

300mm / 12″

10 Pieces


2.11mm / .0831″

300mm / 12″

10 Pieces


2.12mm / .0835″

300mm / 12″

10 Pieces


2.13mm / .0839″

300mm / 12″

10 Pieces


2.14mm / .0843″

300mm / 12″

10 Pieces


2.15mm / .0846″

300mm / 12″

10 Pieces


2.16mm / .0850″

300mm / 12″

10 Pieces


2.17mm / .0854″

300mm / 12″

10 Pieces


2.18mm / .0858″

300mm / 12″

10 Pieces


2.19mm / .0862″

300mm / 12″

10 Pieces


2.20mm / .0866″

300mm / 12″

10 Pieces


2.21mm / .0870″

300mm / 12″

10 Pieces


2.22mm / .0874″

300mm / 12″

10 Pieces


2.23mm / .0878″

300mm / 12″

10 Pieces


2.24mm / .0882″

300mm / 12″

10 Pieces


2.25mm / .0886″

300mm / 12″

10 Pieces


2.26mm / .0890″

300mm / 12″

10 Pieces


2.27mm / .0894″

300mm / 12″

10 Pieces


2.28mm / .0898″

300mm / 12″

10 Pieces


2.29mm / .0902″

300mm / 12″

10 Pieces


2.30mm / .0906″

300mm / 12″

10 Pieces


2.31mm / .0909″

300mm / 12″

10 Pieces


2.32mm / .0913″

300mm / 12″

10 Pieces


2.33mm / .0917″

300mm / 12″

10 Pieces


2.34mm / .0921″

300mm / 12″

10 Pieces


2.35mm / .0925″

300mm / 12″

10 Pieces


2.36mm / .0929″

300mm / 12″

10 Pieces


2.37mm / .0933″

300mm / 12″

10 Pieces


2.38mm / .0937″

300mm / 12″

10 Pieces


2.39mm / .0941″

300mm / 12″

10 Pieces


2.40mm / .0945″

300mm / 12″

10 Pieces


2.41mm / .0949″

300mm / 12″

10 Pieces


2.42mm / .0953″

300mm / 12″

10 Pieces


2.43mm / .0957″

300mm / 12″

10 Pieces


2.44mm / .0961″

300mm / 12″

10 Pieces


2.45mm / .0965″

300mm / 12″

10 Pieces


2.46mm / .0969″

300mm / 12″

10 Pieces


2.47mm / .0972″

300mm / 12″

10 Pieces


2.48mm / .0976″

300mm / 12″

10 Pieces


2.49mm / .0980″

300mm / 12″

10 Pieces


2.50mm / .0984″

300mm / 12″

10 Pieces


2.51mm / .0988″

300mm / 12″

10 Pieces


2.52mm / .0992″

300mm / 12″

10 Pieces


2.53mm / .0996″

300mm / 12″

10 Pieces


2.54mm / .1000″

300mm / 12″

10 Pieces


2.55mm / .1004″

300mm / 12″

10 Pieces


2.56mm / .1008″

300mm / 12″

10 Pieces


2.57mm / .1012″

300mm / 12″

10 Pieces


2.58mm / .1016″

300mm / 12″

10 Pieces


2.59mm / .1020″

300mm / 12″

10 Pieces


2.60mm / .1024″

300mm / 12″

10 Pieces


2.61mm / .1028″

300mm / 12″

10 Pieces


2.62mm / .1031″

300mm / 12″

10 Pieces


2.63mm / .1035″

300mm / 12″

10 Pieces


2.64mm / .1039″

300mm / 12″

10 Pieces


2.65mm / .1043″

300mm / 12″

10 Pieces


2.66mm / .1047″

300mm / 12″

10 Pieces


2.67mm / .1051″

300mm / 12″

10 Pieces


2.68mm / .1055″

300mm / 12″

10 Pieces


2.69mm / .1059″

300mm / 12″

10 Pieces


2.70mm / .1063″

300mm / 12″

10 Pieces


2.71mm / .1067″

300mm / 12″

10 Pieces


2.72mm / .1071″

300mm / 12″

10 Pieces


2.73mm / .1075″

300mm / 12″

10 Pieces


2.74mm / .1079″

300mm / 12″

10 Pieces


2.75mm / .1083″

300mm / 12″

10 Pieces


2.76mm / .1087″

300mm / 12″

10 Pieces


2.77mm / .1091″

300mm / 12″

10 Pieces


2.78mm / .1094″

300mm / 12″

10 Pieces


2.79mm / .1098″

300mm / 12″

10 Pieces


2.80mm / .1102″

300mm / 12″

10 Pieces


2.81mm / .1106″

300mm / 12″

10 Pieces


2.82mm / .1110″

300mm / 12″

10 Pieces


2.83mm / .1114″

300mm / 12″

10 Pieces


2.84mm / .1118″

300mm / 12″

10 Pieces


2.85mm / .1122″

300mm / 12″

10 Pieces


2.86mm / .1126″

300mm / 12″

10 Pieces


2.87mm / .1130″

300mm / 12″

10 Pieces


2.88mm / .1134″

300mm / 12″

10 Pieces


2.89mm / .1138″

300mm / 12″

10 Pieces


2.90mm / .1142″

300mm / 12″

10 Pieces


2.91mm / .1146″

300mm / 12″

10 Pieces


2.92mm / .1150″

300mm / 12″

10 Pieces


2.93mm / .1154″

300mm / 12″

10 Pieces


2.94mm / .1157″

300mm / 12″

10 Pieces


2.95mm / .1161″

300mm / 12″

10 Pieces


2.96mm / .1165″

300mm / 12″

10 Pieces


2.97mm / .1169″

300mm / 12″

10 Pieces


2.98mm / .1173″

300mm / 12″

10 Pieces


2.99mm / .1177″

300mm / 12″

10 Pieces


3.00mm / .1181″

300mm / 12″

10 Pieces