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Summary of Contents for SCHUNK ROTA NCR Series
- Page 1 Translation of the original manual Power Chuck ROTA NCR Assembly and operating manual Superior Clamping and Gripping...
- Page 2 Imprint Copyright: This manual remains the copyrighted property of SCHUNK GmbH & Co. KG. It is solely supplied to our customers and operators of our products and forms part of the product. This documentation may not be duplicated or made accessible to third parties, in particu- lar competitive companies, without our prior permission.
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Page 3: Table Of Contents
Table of Contents Table of Contents 1 General ........................5 1.1 About this manual ....................5 1.1.1 Presentation of Warning Labels ..............5 1.1.2 Applicable documents ................... 6 1.1.3 Sizes ....................... 6 1.2 Warranty ........................6 1.3 Scope of delivery ...................... 6 2 Basic safety notes .................... - Page 4 Table of Contents 4 Torques per screw ....................26 5 Mounting ........................ 27 5.1 Installing and connecting ..................27 5.2 Checking the chuck mounting ................27 5.3 Assembly of the chuck on the machine ..............28 5.3.1 Mounting the chuck with a reduction or extension flange ......30 5.3.2 Mounting the chuck by means of a direct mount ........
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Page 5: General
General General About this manual This manual contains important information for a safe and appro- priate use of the product. This manual is an integral part of the product and must be kept accessible for the personnel at all times. Before starting work, the personnel must have read and under- stood this operating manual. -
Page 6: Applicable Documents
• Catalog data sheet of the purchased product * • Calculation of the jaw centrifugal forces, "Technology" chapter in the lathe chuck catalog * The documents marked with an asterisk (*) can be downloaded on our homepage www.schunk.com. 1.1.3 Sizes This operating manual applies to the following sizes: •... -
Page 7: Basic Safety Notes
By conversions, changes, and reworking, e.g. additional threads, holes, or safety devices can impair the functioning or safety of the product or damage it. • Structural changes should only be made with the written approval of SCHUNK. 02.00|ROTA NCR |en... -
Page 8: Spare Parts
Use of unauthorised spare parts Using unauthorised spare parts can endanger personnel and damage the product or cause it to malfunction. • Use only original spare parts or spares authorised by SCHUNK. Chuck jaws Requirements of the chuck jaws Stored energy can make the product unsafe and risk the danger of serious injuries and considerable material damage. -
Page 9: Environmental And Operating Conditions
Basic safety notes Environmental and operating conditions Required ambient conditions and operating conditions Incorrect ambient and operating conditions can make the product unsafe, leading to the risk of serious injuries, considerable material damage and/or a significant reduction to the product's life span. •... -
Page 10: Personal Protective Equipment
Basic safety notes Qualified personnel Due to its technical training, knowledge and experience, qualified personnel is able to perform the delegated tasks, recognize and avoid possible dangers and knows the relevant standards and regulations. Instructed person Instructed persons were instructed by the operator about the delegated tasks and possible dangers due to improper behaviour. -
Page 11: Transport
Basic safety notes • Observe the care and maintenance instructions. • Observe the current safety, accident prevention and environmental protection regulations regarding the product's appli-cation field. 2.10 Transport Handling during transport Incorrect handling during transport may impair the product's safety and cause serious injuries and considerable material damage. -
Page 12: Fundamental Dangers
Basic safety notes 2.13 Fundamental dangers General • Observe safety distances. • Never deactivate safety devices. • Before commissioning the product, take appropriate protective measures to secure the danger zone. • Disconnect power sources before installation, modification, maintenance, or calibration. Ensure that no residual energy remains in the system. -
Page 13: Protection Against Dangerous Movements
Basic safety notes 2.13.3 Protection against dangerous movements Unexpected movements Residual energy in the system may cause serious injuries while working with the product. • Switch off the energy supply, ensure that no residual energy remains and secure against inadvertent reactivation. •... - Page 14 Basic safety notes DANGER Risk of fatal injury to operating personnel due to the workpiece falling down or being flung out in the event of a power failure In the event of a power failure, the lathe chuck's clamping force may fail immediately and the workpiece may be released in an uncontrolled manner.
- Page 15 Basic safety notes DANGER Possible risk of fatal injury to operating personnel from clothing or hair being caught on the lathe chuck and being dragged into the machine Loose clothing or long hair may become caught on projecting parts of the lathe chuck and be drawn into the machine. •...
- Page 16 Basic safety notes CAUTION Risk of burns due to workpieces with high temperatures. • Wear protective gloves when removing the workpieces. • Automatic loading is preferred. CAUTION Risk of damage due to incorrect choice of clamping position for chuck jaws on workpiece. If an incorrect clamping position is chosen for the chuck jaws on workpiece, the base and top jaws may become damaged.
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Page 17: Technical Data
Technical data Technical data Chuck data ROTA NCR 1000 Max. actuating force [kN] Max. clamping force [kN] Max. speed [rpm] 4000 3500 3000 2500 1400 1200 1000 Stroke per jaw [mm] Piston stroke 13.5 15.0 18.5 20.0 30.0 30.0 40.0 40.0 60.0 [mm]... -
Page 18: Clamping Force / Speed Diagrams
The chucks were operated with the max. permissable force and the jaws were located exactly on line with the chuck O.D. The chuck is in perfect condition and lubricated with SCHUNK LINOMAX special grease. Should one or several of the above mentioned parameters be changed the diagrams are no longer valid. - Page 19 Technical data Clamping force/RPM graph for ROTA NCR 200 Clamping force/RPM graph for ROTA NCR 250 Clamping force/RPM graph for ROTA NCR 315 02.00|ROTA NCR |en...
- Page 20 Technical data Clamping force/RPM graph for ROTA NCR 400 Clamping force/RPM graph for ROTA NCR 500 Clamping force/RPM graph for ROTA NCR 630 02.00|ROTA NCR |en...
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Page 21: Calculations For Clamping Force And Speed
Technical data Clamping force/RPM graph for ROTA NCR 800 Clamping force/RPM graph for ROTA NCR 1000 * without centrifugal force compensation ** with centrifugal force compensation Calculations for clamping force and speed Missing information or specifications can be requested from the manufacturer. -
Page 22: Calculation Of The Required Clamping Force In Case Of A Given Rpm
Technical data 3.3.1 Calculation of the required clamping force in case of a given rpm The initial clamping force F is the total force impacting radially on the workpiece via the jaws due to actuation of the lathe chuck during shutdown. Under the influence of rotation, the jaw mass generates an additional centrifugal force. - Page 23 Technical data The required effective clamping force for machining F is calculat- ed from the product of the machining force F and the safety factor S . This factor takes into account uncertainties in the calcu- lation of the machining force. According to VDI 3106: S ≥...
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Page 24: Calculation Example: Required Initial Clamping Force Fsp0 For A Given Rpm N
Technical data The centrifugal torque of the base jaws M can be found in the table "Chuck data"( 3.1, Page 17). The centrifugal torque of the top jaws M is calculated as per: 3.3.2 Calculation example: Required initial clamping force Fsp0 for a given rpm n The following data is known for the machining job: •... -
Page 25: Calculation Of The Permissible Rpm Nzul In Case Of A Given Initial Clamping Force Fsp0
Technical data The chuck has 3 jaws, the total centrifugal torque is: The total centrifugal force can now be calculated: Initial clamping force during shutdown that was sought: 3.3.3 Calculation of the permissible rpm nzul in case of a given initial clamping force Fsp0 The following formula can be used to calculate the permissible RPM for a given initial clamping force during shutdown:... -
Page 26: Grades Of Accuracy
Technical data Grades of Accuracy Tolerances for run-out accuracy and axial run-out accuracy corre- spond to the Technical Supply Terms for lathe chucks as per DIN ISO 3089. Permissible imbalance The permissible imbalance for lathe chucks is quality class G 6.3 as per DIN ISO 1940-1. Torques per screw Tightening torques for mounting screws used to clamp the chuck on lathes or other suitable technical equipment... -
Page 27: Mounting
Mounting Mounting Installing and connecting WARNING Risk of injury due to unexpected movements! If the power supply is switched on or residual energy remains in the system, components can move unexpectedly and cause serious injuries. • Before starting any work on the product: Switch off the power supply and secure against restarting. -
Page 28: Assembly Of The Chuck On The Machine
Mounting Chuck assembly Assembly of the chuck on the machine The item numbers specified for the corresponding individual components relate to chapter drawings.( 9, Page 41) Chucks in sizes 165 and 200 The screws (item 10) cannot be inserted into the piston (item 3) and rotated. - Page 29 Mounting • Completely unscrew screw (item 33) from the piston. Caution: Secure loose pins (item 31) separately. • The rotatable screw (item 10) can only be actuated directly us- ing an Allen key. • Lift the chuck using lifting equipment on the eye bolt so that it is flush with the center of the spindle.
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Page 30: Mounting The Chuck With A Reduction Or Extension Flange
Mounting Cylinder piston in foremost position R1 = Push the chuck piston to its foremost position and measure with a depth gauge. R2 = Draw bar in foremost position. Measure with a depth gauge. 5.3.1 Mounting the chuck with a reduction or extension flange If the chuck is screwed on with an intermediate flange, the following points must be observed: •... -
Page 31: Mounting The Chuck By Means Of A Direct Mount
Mounting • Next, turn in the fastening screws and tighten them slightly. Check the chuck for radial and axial run-out (see figure "Assembly of the chuck" - E) and align with slight blows with a hammer on the outer diameter if necessary. Next, screw the chuck tightly onto the chuck flange by means of the fastening screws using a torque wrench. -
Page 32: Replacing Or Adding To Jaws
Mounting The following table shows the maximum attainable radial and axial run-out tolerances: 1000 Chuck size max. radial run-out error [mm] 0.02 0.02 0.03 0.03 0.04 0.05 0.06 0.08 0.10 max. axial run-out error [mm] 0.02 0.02 0.02 0.03 0.04 0.04 0.04 0.05 0.06 Replacing or adding to jaws When changing the top jaws, the serration must be cleaned. -
Page 33: Option With Bearing Plate
Mounting • Remove the screw (item 35). • Fully screw in the screw (item 33) as far as it will go into the piston (item 3). • Screw in the screw (item 35). Switching off the oscillating clamp: The chuck needs to be moved into the open position for shaft clamping. -
Page 34: Function
Function Function Function and handling The lever chuck is actuated using a rotating solid or through-hole cylinder. The axial tension and pressure forces are diverted into the radial clamping force via lever action. The clamping and opening path of the chuck jaws is determined by the clamping cylinder. - Page 35 Function Speed DANGER Possible risk of fatal injury to operating personnel if the chuck's top speed is exceeded and a workpiece is released or parts fly off. If the machine tool or technical equipment can reach a higher speed than the chuck's top speed, a reliable speed limiter must be installed and proof must be provided that the speed limiter is effective.
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Page 36: Maintenance
"Maintenance intervals" ( 7.2, Page 36)). Measure the clamping force only by using a calibrated Grip Force Tester (SCHUNK SGT 270). Technical Condition The base jaws must move evenly at the smallest possible operating pressure (cylinder). This method is only to some extend expressive and cannot replace clamping force measurement. -
Page 37: Disassembly And Assembly Of The Chuck
Maintenance Disassembly and assembly of the Chuck The item numbers specified for the corresponding individual components relate to chapter drawings.( 9, Page 41) The lathe chuck must only be disassembled once it has been uninstalled (see chapter "Mounting the chuck to the machine" (... -
Page 38: Disassembling And Assembling The Piston
Maintenance Degrease and clean all parts and check them for damage or wear. Only use genuine SCHUNK spare parts when replacing damaged parts. Before assembly, grease well with LINOMAX special grease paste. The lathe chuck is assembled in the same way but in the reverse order. -
Page 39: Spare Parts
Spare parts Spare parts When ordering spare parts, it is imperative to specify the type, size and above all the manufacturing no of the chuck. Seals, sealing elements, screw connections, springs, bearings, screws and wiper bars plus parts coming into contact with the workpiece are not covered by the warranty. - Page 40 Spare parts Item Designation Quantity Mounting screw DIN EN ISO 4762-10.9 different Mounting screw (machine from behind) - DIN EN ISO 4762-10.9 different Pan-head screw Countersunk screw connecting member Set-screw piston The plunger pin Torque pin seat of bearing (165/200/250) Eye bolt Screw seal Adapter seal...
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Page 41: Assembly Drawings
Assembly drawings Assembly drawings 02.00|ROTA NCR |en... - Page 42 Assembly drawings 02.00|ROTA NCR |en...
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Page 43: Translation Of The Original Declaration Of Incorporation
Translation of the original declaration of incorporation in terms of the Directive 2006/42/EG, Annex II, Part 1.B of the European Parliament and of the Council on machinery. Manufacturer/ H.-D. SCHUNK GmbH & Co. Spanntechnik KG Distributor Lothringer Str. 23 D-88512 Mengen...
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