Chucks & shafts

Editor: Laura McCluskey -- Converting Magazine, 7/1/2001

Online: Go to www.convertingmagazine.com

Fax: Enter the corresponding product numbers into the Reader Reply Form in this issue. Fax it toll-free to 800/334-2812.

Phone: All Reader Reply items list telephone and fax numbers.

Call suppliers directly and mention Converting.

Shaft runs length of the body

EMT International, Inc., 920/468-5475, fax: 920/468-7991, www.emtinternational.com

The CL-Series cantilevered leaf-style air shafts contain interlocked leafs that run the length of the body. They are said to be ideal for narrow-web and multiple-core applications. The shaft is activated by supplying air through a fill valve on the end, while air feeds through and inflates the bladder assembly. The expansion of the bladder forces out interlocked leafs to grip the core and provide necessary torque. By releasing the air pressure, it allows the leafs to retract for core removal.

Enter 413 or Inquire Online

Replaceable insert used for safety chuck

Boschert LLC, 800/479-0010, fax: 334/602-6576.

The VT-7 style replaceable insert is used for the co.'s safety chuck. This style is interchangeable with other co. replaceable insert styles already in service such as the square or the triangular seat. The VT-7 is a round geometry combined with a square geometry. The round portion of the roll shaft is supported in the safety chuck as the load of the roll shaft. The square portion of the roll shaft transmits torque from the safety chuck to the roll shaft.

Enter 417 or Inquire Online

New product line with fresh design

Converter Accessory Corp., 800/433-2413, fax: 800/709-1007, www.converteraccessory.com

The new COR-LOK® air shafts and chucks feature a freshly engineered tubing design contoured to match the geometry of the co.'s unique, spiraled shaft body. This new contoured tubing allows increased gripping power, a longer tubing life and easy replacement, reports co. COR-LOK air shaft and chuck systems also offer several air valve options intended to match almost any plant requirements. It only requires 90 to 120 psi to inflate.

Enter 418 or Inquire Online

Carbon fiber shaft uses bladder assembly

Double E Co., 508/588-8099, fax: 508/580-2915.

The Dura-Light® line of high-strength, lightweight carbon fiber shafts use a proprietary Polyprene bladder assembly, which reduces the frequency of shaft failure. If the bladder does fail, replacement is done with the co.'s unique journal fastening system by removing the flatbed screws, sliding the journal out and replacing the bladder. Heat or high pressure is not needed because the co. uses a close tolerance fit and deep insertion to secure journals, never a press fit. Dura-Light shafts won't get stuck in cores, and bladders are never in danger of being punctured by metal fragments, reports co.

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Chucks designed for easy installation

The Montalvo Corp., 800/226-8710, fax: 800/644-5097, www.montalvo.com

The new line of SKL safety chucks are designed for long service life and easy installation, says co. These chucks provide a safe and effective way of coupling torque devices to shafted unwinds or rewinds. A heavy duty bearing design ensures maximum load and speed capabilities for most converting applications. Fixed or sliding shaft models, combined with numerous options, offer a wide range of features. These chucks are available individually or as part of a complete web control system.

Enter 415 or Inquire Online

Air shafts with innovative design

Nim-Cor, Inc., 888/4-NIMCOR, fax: 603/883-6980, www.nimcor.com

These air shafts feature Iso-Grip™, which is designed to accommodate variations in the inside diameter of the core. This system uses a series of independent flanges that work together to provide maximum torque. These flanges securely grip rolls of any continuously wound material for easy and fast roll mounting when in the unwind or rewind position. These air shafts provide a tapered journal fit that ensures concentricity, high performance and reliability, says co. The shaft bodies are available in aluminum, steel and advanced composites.

Enter 420 or Inquire Online

Rewind shaft handles rewind tensions

John Dusenbery Co., 973/366-7500, fax: 973/366-7453, www.dusenbery.com

This air-differential rewind shaft is uses outer rings with expanding elements that are torque activated to grip the core and resist lateral movement. Axial pistons loaded from a bladderless control air supply exert an accurately controllable force on the inside of the inner rings, resulting in vastly improved control throughout the tension range. Because of this, core dusting and tension variations due to core quality are eliminated. The bladderless design and self-lubricating rings also ensure a long, trouble-free service life, reports co.

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Shaft incorporates high-tech capabilities

Convertech Inc., 973/328-1850, fax: 973/328-7256

The Trapper leaf shaft firmly holds the leading edge of materials for easy startup and has an automatic release for easy removal of finished rolls. These shafts employ one fixed leaf that assists the roll in running concentrically and are available with lift-out or flanged mountings.

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Core chuck allows for on-machine service

Schlumpf, Inc., 207/893-1903, fax: 207/893-1905, www.schlumpf-inc.com

The new QuickGrip™ torque-activated core chucks combine high quality, low cost and ease of service to maximize productivity and value, reports co. The value feature allows the chuck to be cleaned, inspected and the segments to be replaced while the chuck remains on the machine.

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Safety chucks stocked in flange

Goldenrod Corp., 800/465-3763, fax: 203/758-0074, www.goldrod.com

These safety chucks provide core-shaft support and torque transmission for new and existing winders. The chucks are rated for material roll weights under 1,000 to 8,000 lbs. These chucks feature optional locking mechanisms, keyed shaft extensions for brake, clutch, drive and replaceable square "V" and square/round "VO" sockets design for quiet, smooth operation. Other models include the standard square "U" and "V" socket designs.

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Airshaft solves repeatable tension equalization

Tidland Corp., 800/426-1000, fax: 360/834-5865, www.maxcessintl.com/tidland

The Model D2 differential air shaft is designed to solve repeatable tension equalization caused by caliper variations across the web width. It has the capability of winding on a single shaft as well as duplex winding. This model provides accurate tension compensation for winding multiple rolls after slitting. It also eliminates inconsistent finished roll tension by controlling individual core slip that is separate from holding lateral core position. Accurate operating tension ranges from 0.25 to greater than 3.0 p.l.i.

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