Precision Expanding Mandrel Set 1/2"-1", 5 Mandres & 5 Sleeves

Product Information

Hardinge is the expert in precise part length control, pioneering the Dead-Length 5C and 16C collets for high-production manufacturing. Our Sure-Grip Expanding Collet Systems feature built-in part length control with a double-angle design, ensuring precise workpiece lengths by securely locating them against the arbor face or a machineable work stop. This stability results in heavier cuts, improved surface finishes, and tighter tolerances, making it easy to machine long parts. We also offer custom Sure-Grip Collets for special spindle, sub-spindle, mill table, Swiss, and multi-spindle machine applications. You can even get splined or serrated surfaces for unique grips or recessed draw-plug styles for short gripping challenges. A mandrel is a cylindrical, tapered rod (shaft or a spindle) that helps hold or shape the workpiece. Mandrels are typically made of steel and are used in hollow jobs on lathes, industrial, and jewelry machines. They shouldn’t be confused with an arbor, which holds tools rather than workpieces. Expanding mandrels are especially useful when a workpiece requires secondary machining operations because these devices enable external diameters to be turned in a single operation, increasing concentricity between the two operations. They also prevent damage to previously machined surfaces, which is why expanding mandrels are often used on lathe sub spindles. The access they provide to a workpiece’s entire outer surface also makes them well-suited for use on lathes with live tooling.

Mandrels are typically slightly tapered to provide support during machining, so a solid frictional grip between the mandrel and the hole wall is in place when pressed into a previously machined hole.

Side-actuated with an included square-drive key means that this unit can accommodate parts with blind bores as well as those with thru-holes. The screwed mandrel has a fixed collar and an open threaded end to allow screwing threaded workpieces for machining purposes. This mandrel type is used when the inner part of the workpiece is threaded. Cone Mandrel We provide a wide selection of Collet Style Expanding Mandrels, manufactured by industry leading partner Hardinge, offering solutions to difficult machining problems for turning, milling, grinding, assembly and automation applications. We guarantee exact workpiece lengths, even for particularly long parts, as our bespoke line of mandrels have extremely high stability. There are many specialized mandrels out there that are designed to fix specific problems. Following are some of these mandrels: Several forces act on the workpiece to make it deflect away from the center, which makes the usage of mandrels necessary.

Expanding mandrel has a slightly complex construction. It has a mounted bush over a tapered arbor, which has a tapered hole with three longitudinal cuts. Two slots are cut nearly through, while the third cut is of full length. This construction allows the expansion of split bushing within a limit. The lathe dog should be secured to the end of the mandrel rather than on the smooth surface of the mandrel taper.This article aimed to provide general information regarding mandrels. Mandrels are either used to hold a workpiece or reshape it. Specialized mandrels may be for specific purposes. Forging and reshaping: Ring mandrels (also called triblets) are used in the jewelry industry for forging and reshaping rings on them. A great option for low/medium-volume production. For high-production environments, use the standard KEM series The step mandrel isn’t plain like plain mandrel but has step collars of different diameters fitted with it. This allows it to be used for various diameters of workpieces. Step mandrel is used when the inner portion of the workpiece is in the form of steps, which makes step mandrel the right choice. Gang Mandrel