A toolholder is a device that safely provides a critical
interface between the cutting tool and the spindle of the CNC machine. The
cutting tool is mounted into the holder and is tightened so it does not move or
vibrate during machining; providing the stability you need to ensure precision
cuts every time. Redline toolholders are all guaranteed to meet or exceed all AT3
shank specifications to ensure a proper fit onto your milling machine spindle.
We offer Cat 40, Cat 50 and HSK63A toolholders in: shrink fit holders - ER11 – ER16
– ER20 – ER25 – ER32 – ER40 – TG100 – TG150 collet chuck holders, hydraulic
chucks, endmill holders, facemill (shell mill) holders, tap (rigid and
tension & compression) holders, Jacobs taper holders, slitting saw holders,
stub arbor holders, Morse taper holders, boring head holders, adapters, toolholder
packages, and more.
All Redline toolholders are proudly made in the USA with American
8620 steel. Our craftsmanship and attention to detail in a quality tool, provides
the performance required by the American machinist. Our toolholders are
designed with AT3 or better shank taper accuracy and are concentric to <.0002
(.005 MM or 5 microns), placing the tool precisely on the machine spindle
center line. This accuracy promotes minimal tool wear and replacement, saving
you time and money.
We carry a wide assortment of toolholders for any CNC
milling application in industries including automotive, medical, aerospace,
computer, defense electronics, and job shops. Whether drilling, milling,
tapping, or conducting quality control testing, at RedLine Tools you will find
the toolholder to effectively and securely attach your tools to your critical
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CAT tooling comes in a range of sizes designated as CAT 30, CAT 40, CAT 50, etc. The number refers to the Association for Manufacturing Technology’s (formerly the National Machine Tool Builders Association (NMTB)) taper size of the tool. CAT toolholders were developed for the Caterpillar tractor company and are sometimes called V-Flange Tools. They are of a robust design used primarily for a range of applications from precision machining to heavy duty roughing. This type of toolholder is supported by ATC (automated tool change) technology. The toolholder body is pulled into the milling spindle with the aid of a retention knob and centered via the taper contact. Spindle speeds up to 12,000 rpm are standard with steep-taper tools. CAT toolholders will accept both imperial and metric sized tools.
BT steep-taper toolholders have a thick flange.
CAT steep-taper toolholders have a narrow flange.
HSK toolholders are a relatively new design and common on European machines imported into the United States. HSK is a German acronym for “hollow taper shank”. They do not have the retention knob of the CAT toolholders but instead have a hollow shank. The clamping mechanism in a HSK toolholder is operated from the inside, incorporating segmented collets that expand radially under pressure. The collet’s chamfer matches that of the inner wall of the shank allowing it to lock securely when the drawbar is actuated. Twice as much clamping force is generated on the flange in a HSK tool than that of the CAT type. The increased clamping force generated is due to the simultaneous taper and flange spindle connection. This creates radial stiffness up to five times that of steep-taper toolholders. HSK toolholders are balanced for high-speed machining and have a lower tolerance between the spindle receiver and the taper body than CAT tools.
HSK toolholders offer a few advantages over CAT toolholders, especially in high-speed milling machine spindles, tool collisions and maintenance. HSK toolholders are lighter in mass which allows machines to accelerate and decelerate quicker than CAT toolholders. At spindle speeds higher than 8,000 rpm, the spindle receiver expands faster than the shank. Because HSK toolholders have a hollow design, its shank acts like a fuse and during a crash, will break off protecting the shank of the machine.
A collet chuck is a type of chuck that forms a collar around a tool and applies a high static friction force, holding the object firmly and in accurate alignment. The "ER" collet system, developed and patented by Rego-Fix in 1973 is the most widely used collet system in the world today. The ER line consist of ER-8, ER-11, ER-16, ER-20, ER-25, ER-32, ER-40, and ER-50. The numbers in the series are the inner diameter of the collet. RedLine Tools offers a full line of ER collet chuck holders that are balanced to G2.5 @ 18,000 rpm.
Shrink Fit Holders require a shrink fit machine which expandsthe bore when heated to accept a cutting tool. Once cooled the toolis held securely over the entire length of the shank resulting insuperior gripping force with minimal runout.
Hydraulic chucks are used for milling, drilling, reaming, and boring. Hydraulic chucks can be run up to 50,000 rpm and are concentric to .00012". There are a wide range of coolant sealed or coolant flush reduction sleeves available. Our Hydraulic Chucks are balanced to G2.5 @ 25,000 rpm.
Successful Use and Care for RedLine Hydraulic Chucks
CNC machine tool calibration is the process of measuring, diagnosing and operating within the manufacturing tolerance. Over time your machine will drift out of calibration. Calibrating your machine will: