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SCHUNK KSC3 - User Manual

SCHUNK KSC3
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schunk.com XND.00046.002_A 08/2022 1
Montage- und Betriebsanleitung
Installation- and operating instruction
Zentrischspanner
Centric vise
KSC3
H.-D. SCHUNK GmbH & Co.
Spanntechnik KG
Lothringer Strasse 23
D-88512 Mengen
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Summary

User Information

Purpose and Validity of Document

States the purpose of the document and its validity for installation, commissioning, operation, servicing and maintenance.

Safety Instruction Symbols

Explains the meaning of danger, warning, and note symbols used in the document.

General Safety Instructions

Intended Use and Technical Data

Specifies device usage for milling machines and lists technical specifications like torque and force.

Misapplication and Spare Parts

Lists forbidden applications, potential misuses, and requirements for spare parts.

Residual Risk and Clamping Technology

Addresses potential risks, jaw tightening, and notes on clamping technology.

Operator and Organization Duties, PPE, Warranty

Covers duties of organization/operators, PPE requirements, and warranty conditions.

Description of the Clamping Device

Function

Explains the KSC3 vise's direct mechanical drive, force generation, and suitability for internal/external clamping.

Operation (Standard Operation)

Clamping; Aligning

Details the procedure for clamping and aligning workpieces, including notes on palleting systems.

Jaw Change and Maximum Carriages Opening

Explains jaw replacement, correct tightening torque, and limitations on carriage opening to prevent contamination.

Servicing, Cleaning and Maintenance

Provides instructions for cleaning, oiling, and lubricating the clamping device for optimal function.

Troubleshooting

Addresses issues like a hard-to-operate device and outlines the removal process for carriages.

Installation and Maintenance

Installation Procedures

Details steps for cleaning, greasing, inserting carriages, and checking the central position.

Swivel and Adapter Plate Fitting

Describes how to fit swivel and adapter plates, including notes on workpiece clamping positions.

Fitting the 6-fold Reversible Jaws

Guides on positioning and tightening 6-fold reversible jaws for optimal clamping results.

Troubleshooting Swivel Plate

Provides steps to resolve issues with a stiff swivel plate, including checking for damage and lubrication.

Specific Applications and Service

Aluminium Jaws

Explains the use of aluminium jaws for workpiece-specific contour milling and pre-clamping.

Service; Maintenance

Notes that spare parts for carriages, base plates, and spindles are not supplied; repairs by manufacturer.

Taking Out of Service

States that the clamping device and accessories can be disposed of as scrap metal safely.

Overview

The SCHUNK KSC3 is a centric vise designed for precise clamping of raw and finished workpieces. It operates with a mechanical drive via a capsuled thread, generating force linearly across its entire clamping range without a force amplifier. Both jaws and carriages close and open synchronously and symmetrically with respect to the position holes in the base plate. This design also allows for workpiece clamping from both the inside and outside.

Technical Specifications:

The KSC3 series offers various models with different clamping forces and torque requirements:

  • KSC3 80: Max. torque 90 Nm, Max. clamping force 25 kN.
  • KSC3 125: Max. torque 100 Nm, Max. clamping force 35 kN.
  • KSC3 160: Max. torque 175 Nm, Max. clamping force 50 kN.

Exceeding the maximum pull-in torque can lead to spindle damage.

Weight (without system jaws):

  • KSC3 80 L-130: 3.0 kg
  • KSC3 80 L-190: 4.5 kg
  • KSC3 125 L-160: 6.4 kg
  • KSC3 125 L-235: 9.5 kg
  • KSC3 125 L-300: 12.5 kg
  • KSC3 160 L-280: 25.0 kg
  • KSC3 160 L-480: 35.0 kg

All tolerances are without a nickel layer of 5µm per surface.

Usage Features:

Intended Use: The clamping device is designed for stationary application on milling machines in an industrial environment. Proper use includes adherence to commissioning, installation, operating instructions, and environmental/service conditions specified by the manufacturer. Non-intended use voids manufacturer liability for damage.

Jaw Change: The reliable function of the clamping device is significantly influenced by the selection of the correct top jaws. Insufficiently tightened system jaws can lead to damage. When changing jaws or moving them in the carriages, the cylinder screws must be tightened to the prescribed torque:

  • KSC3 80: 50 Nm
  • KSC3 125: 60 Nm
  • KSC3 160: 140 Nm Failure to comply can result in insufficient workpiece clamping, loss, and damage to workpieces.

Clamping: The clamping force must be adapted to the jaw width and workpiece width. The operator is responsible for ensuring that the clamping geometry and forces are suitable for the intended processing. Using a torque wrench for clamping is recommended to achieve consistent results. Clamping forces are only achieved if the device functions correctly and the workpiece is properly held. Regular servicing and cleaning are essential for correct function. When clamping thin-walled or elastic workpieces (e.g., tubes), the clamping force may be significantly reduced due to yielding. High-force clamping can also reduce clamping force due to increased frictional forces in the carriages.

Maximum Carriages Opening: The clamping range depends on the vise type and selected system/top jaws. Carriages have a marking indicating the maximum opening. Exceeding this range can lead to contamination of the encapsulated area and bearing area by chips. Workpiece clamping outside these markings can result in workpiece loss and damage to the vise.

Swivel and Adapter Plate:

  • OP10: Clamping with grip clamping steps of 3, 8, or 18 mm.
  • OP20: Clamping on tungsten carbide coated side. System jaws may yield slightly, so workpiece position must be measured.
  • For KSC3 125-160 and KSC3 160, a centric workpiece position relative to the base plate symmetry is possible depending on the mounting position of the swivel plate or 6-fold turning jaws.
  • For KSC3 80, KSC3 125-235, and KSC3 125-300, workpieces are clamped asymmetrically to the base plate.
  • For stability, the swivel plate with the bearing journal must not be inserted in the outermost sliding groove.

Fitting the 6-fold Reversible Jaws:

Determine the best mounting positions for the 6-fold reversible jaws, achieving optimal clamping results when clamping parts as far out as possible. Move cover screws to the selected clamping position. Loosely insert cylinder screws into the 6-fold reversible jaws. Turn the jaws to the required clamping faces and slightly pre-clamp the workpiece to ensure parallel contact. Tighten cylinder screws to 80 Nm. If clamping faces are not aligned parallel to the workpiece surface, the jaws may loosen due to clamping force.

Aluminium Jaws: These are designed for producing workpiece-specific clamping contours. For maximum contour precision, contour milling should be performed with pre-clamping of the aluminium jaws. A narrow spacer piece can be clamped at the bottom, and the pre-clamped aluminium jaws can then be milled to achieve the desired contour. The system jaw should be milled to a maximum depth of the screw head, ensuring sufficient clamping cross-section.

Maintenance Features:

Servicing, Cleaning, and Maintenance: Ensure the sliding surface between system jaws and the spindle is free of chips when adjusting the clamping range. For cleaning under the carriages, KSC3 80 and KSC3 125-160 vises can be opened beyond the maximum and flushed. Regularly clean and oil the running surfaces and guides (e.g., with MOTOREX Supergliss 68 K to ISO VG 68). The KSC3 160 has a lubrication nipple in the carriage groove; monthly application is recommended, with carriages completely closed.

Installation:

  • Clean the system completely.
  • Re-grease the spindle thread and carriages with EP high-performance grease (e.g., LAGERMEISTER WHS 2002, NLGI class 1-2).
  • Oil the running surfaces and bearings of the vise (e.g., with MOTOREX Supergliss 68 K to ISO VG 68).
  • Insert both carriages into the base plate up to the thread beginnings of the spindle.
  • Both carriages and the base plate must have identical serial numbers.
  • Screw in the threads by turning the spindle clockwise and pressing on both carriage ends simultaneously.
  • Both carriages must come together and engage in the threads at the same time to ensure consistent central position.
  • Check the central position: The gap between the carriage slot and the end face of the base plate must be identical on both sides. If not, remove and repeat the process.
  • Fully join the carriages so that the inside wipers on KSC3 125-235, KSC3 125-300, and KSC3 160 are pressed into the carriages via the spacer O-rings.
  • If present, refit end stops.
  • The high degree of precision of the KSC3 is achieved during a processing step while mounted. Components of different vises must not be interchanged. Both carriages and the base plate must have the identical serial number to ensure consistent central position and proper guide fitting. Further dismantling by the user is not permitted but can be carried out by the manufacturer or an authorized service agent. Non-compliance with this rule invalidates the warranty.

Troubleshooting, Eliminating Faults:

  • Device is hard to operate: Disassemble system jaws and clean the entire device. If this doesn't improve function, the device can be further dismantled as described.
  • Swivel plate is difficult to turn: Disconnect the swivel plate and push the swivel peg from below. Check the vise guide and swivel plate surface for indentations or deformations; re-grind if necessary. Check the peg for soiling. Check that O-rings are correctly positioned and make good contact. Lubricate the entire system with grease and reassemble. When handling, the swivel plate should not be turned upside down.

Warranty: The warranty period is 24 months from the date of delivery, subject to intended use, compliance with concurrent documents, environmental/operating conditions, specified maintenance/lubrication intervals, and maximum service life. Parts in contact with workpieces are not covered. Maximum service life is 24 months or 50,000 clamping cycles.

Spare and Wear Parts: Only use original parts or manufacturer-approved parts. Using third-party parts may lead to risks. Spare parts for carriage, base plate, and spindle are not supplied separately as they are designed and fitted at the factory to work together. Repairs can only be carried out by the manufacturer or an authorized service agent.

Taking out of Service: The clamping device and all accessories can be disposed of as scrap metal without risk.

SCHUNK KSC3 Specifications

General IconGeneral
BrandSCHUNK
ModelKSC3
CategoryIndustrial Equipment
LanguageEnglish

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