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Bit/Fastener Reference Charts:
Selecting the Proper Hardness Level for Bits:
Choosing the proper hardness level for fastener driving tools is important to achieve long tool life. Different applications, operators and power tools require different hardness levels. Vega offers a choice of two hardness levels in many of our bits, Standard and Extra Hard (X). Extra Hard bits are designated by adding an ‘X’ onto the end of the part number.
The proper hardness level depends on the failure mode. If the bit breaks or shatters, select a bit with less hardness. If the failure mode is wear, select a harder bit. In general, high torque applications require lower hardness levels to withstand twisting and resist breakage. Extra Hard bits are mainly used in low torque applications, particularly with hardened screws.
The standard hardness level should be selected unless a specific application suggests using an increased hardness level. Contact your Vega representative for specific recommendations.
Material & Finish Knowledge:
S2 Modified Steel – All Vega bits are made from shock resistant S2 modified steel and have a Rockwell hardness of between 58-62 HRC. S2 Modified steel is the most durable material for the performance required by our professional end users.
Stainless Steel – Ideal for environments where corrosion and rust are severe. The 420C high performance Stainless Steel used by Vega provides a superior mix of strength and corrosion resistance.
Diamond Tip – The diamond grit is embedded in the steel substrate and improves screw engagement reducing the risk of damage to the screw recess. This extra hard diamond coating wears less and grips better than a Titanium coating.
Titanium Nitride – These bits have a rough surface creating millions of micro gripping points. The Titanium coating provides an extra hard surface over the gripping points to protect them during use. The increase in roughness grips the entire recess of the screw and reduces cam out.
Fastener Driving Tool Terminology:
ACR – ACR stands for anti-cam-out recess.There are ribs on the driver bit that engage the fastener recess to reduce stripping, provide increased torque, enhance off-angle drivability, and offer a stick fit that makes screw driving easier.
Shank – The shank is the end of a bit grasped by the chuck of a tool.
Torsion Zone – In a true torsion bit this is the reduced diameter section of the shank between the hex body and tip.This area absorbs torque during impact extending the life of the bit.
Lobular Design – A design used on nutsetters that has more of a rounded shape in the opening end.This design reduces stripping damage of hex head fasteners by driving the fastener on the sides instead of on the corners.
Finder Sleeve – A sleeve used on slotted bits that slides over the slotted fastener preventing the bit from slipping out of the screwing while driving it.
Ball Lock Type – This retention design uses a ball and spring tension method to secure sockets to an extension or adapter.Tools can typically be removed by hand allowing for quick changes.
Pin Lock Type – This retention design uses a pin and spring tension method to secure sockets to an extension or adapter.It is a more secure retention method than a ball lock and is commonly used in production applications.
C-Ring – A retention method used in bit holders that has a ring which locks around corresponding grooves in an insert bit to firmly hold it in place.
Quick-Release – Mechanism commonly used in bit holders and extensions that has a retractable sleeve that when extended quickly releases the bit avoiding the need for force or pressure to remove it.
Screw Cap – Retention method that allows the bit to be inserted into the screw cap which is then threaded onto the bit holder.
Bull Nose – A style of bit where the tip of the bit is a larger diameter than the hex shank body.