DF-50-180 Shear Cut Holder

The DF-50-180 shear cut top knife holder is a high speed pneumatic circular knife holder best utilized on light to medium paper and all non-woven materials. You can cut widths down to 50mm (1.97”) at web speeds of up to 1,950 meter per minute (6,400 feet per minute). The DF-50-180 is designed around the innovative and well proven Dienes zero clearance double shaft guidance system for vibration damping and maximizing top knife holder rigidity which results in cleaner slits and longer circular knife life. A micrometer adjustment device allows for precise depth
control setting to ensure the highest slitting quality. This top knife holder also includes a pneumatically adjustable side force control for the precision ball bearing guided lower head in order to maximize knife life and edge cut quality. Features include choice of dovetail or linear bearing mounts, precision cant angle plates, 360 degree blade guard, quick change lower circular knife head, optional Easy-Set tab, optional oil wick, 180mm (7.1”) diameter circular blade and a TWO YEAR WARRANTY! When your operation requirements demand cutting know-how, high speed, and quality – call Dienes.


  • 360° Guard – for operator safety
  • Oil Wicks – for blade lubrication
  • Vacuum Guard – to minimize slitting dust
  • ES-Tab – for bottom knife alignment on Center Linear Bearing mounting system
  • Spanner Wrench – for PQG holders only
  • Knife removal guards
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Additional information

Dienes Part #

Drawing Number

Minimum Slit Width Inches

Minimum Slit Width Millimeters

Maximum Web Speed ft/min

Maximum Web Speed m/min


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  Item # Item Name Dienes Part #
P3140-0001 DF-50-180 Dovetail Mount Shear Cut Holder P3140-0001
P3140-0002 DF-50-180 Linear Bearing Mount Shear Cut Holder P3140-0002
  Item # Item Name Dienes Part #
10 Lower Guard Housing 245D224A01001
20 Knife Carrier 411457
30 Bushing 245C060537010
40 Axle 245C030546030
60 Intermediate Ring 245C070539010
70 Inner Cover 245C070541010
80 Outer Cover 245C070540010
90 Intermediate Plate 245C030548010
100 Stepped Intermediate Plate 245C040547030
120 Diaphragm 022137
130 Circular Spring 263C070034010
140 Washer 021583
150 Retaining Ring 021525
160 Retaining Ring 021526
170 Socket Head Countersunk Screw/SCR, CAP, FL SOC HD M6 x 12-Zn 651240
180 Grooved Pin 651241
190 Brass Bearing Cage 651242
200 Ball Bearing 651254
210 Socket Head Countersunk Screw/SCR, CAP, FL SOC HD M4 x 25 614104
220 Low Head Socket Cap Screw/SCR, CAP, LO SDC HD M6 x 25-Zn 651250
250 Stop, End 245D040249010
021707 Replacement Circular Knife for DF-50-180, D2 Material 021707
02134-09 Air Hose Assembly (with Quick Disconnect) for DF-50-180 02134-09
021998 Seal Kit for DF-50-180 021998

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