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Rohm DURO-A RC Translation Of The Original Operating Manual

Power chuck with quick-action jaw replacement
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Translation of the Original Operating Manual
EN
Power chuck with quick-action jaw
replacement DURO-A RC
Store for reference
Version 1.1 • 07.12.2021

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Summary of Contents for Rohm DURO-A RC

  • Page 1 Translation of the Original Operating Manual Power chuck with quick-action jaw replacement DURO-A RC Store for reference Version 1.1 • 07.12.2021...

  • Page 3: Table Of Contents

    Modification of the power chuck ............ 18 Product Description.................  19 About this Power Chuck .................  19 Technical Specifications .................  22 3.2.1 Overview of Construction Sizes ............ 22 3.2.2 Environmental and Operational Conditions........ 26 3.2.3 Permissible Operating Materials............ 26 3.2.4 Clamping Force-Speed Diagram ............ 27 DURO-A RC...
  • Page 4 Lubricating Jaw Guides .............. 58 8.2.3 Checking the Device for Correct Operation ........ 59 8.2.4 Checking the Tightness of Screw Connections........ 63 8.2.5 Inspection of the Power Chuck ............ 64 Storage.....................  66 Troubleshooting .................. 67 Disposal .................... 68 Notes ...................... 69 DURO-A RC...

  • Page 5: About This Operating Manual

    About this Operating Manual This Operating manual describes in detail the use, installation, assembly and maintenance of the power chuck DURO-A RC. The efficiency of the power chuck depends primarily on correct use and careful maintenance. This Operating manual serves as the leading document and is provided on delivery of the product.

  • Page 6: Conventions Of Presentation

    Ø Marks an intermediate result of an operating instruction ü End result of an operating instruction ▪ List Marks elements of a list Marks comments within a list Contains useful information or further information. 6 / 72 DURO-A RC...

  • Page 7: Display Of Safety And Warning Instructions

    Ø List of all measures which must be taken to prevent con- sequences. NOTICE Indicates a possible danger which may lead to damage to property if not avoided. Ø List of all measures which must be taken to prevent con- sequences. DURO-A RC 7 / 72...

  • Page 8: Safety

    Maximum protection of personnel and the environment from dangers and trouble-free operation is only possible when all safety instructions and warnings in this operating manual are observed. 8 / 72 DURO-A RC...

  • Page 9: Intended Use

    The maximum permissible clamping diameter of the jaws and the limits of the jaws must be observed. The power chuck DURO-A RC can be used for both wet and dry machining. The permissible usage and environmental conditions must be observed (En- vironmental and Operational Conditions [} 26]).

  • Page 10: Improper Use

    Any utilisation beyond the scope of the “intended use” poses risks and is not approved by RÖHM. Improper use refers to the following: ▪ Use of the power chuck DURO-A RC for suspending loads; ▪ Use of non-OEM parts as replacement parts; ▪ Use of a non-OEM safety key;...

  • Page 11: Obligations Of The Operator

    ◦ the clamping force, actuating pressure/force and/or clamping distance sufficient to maintain safe clamping of the workpiece/tool, ◦ devices for monitoring the clamping conditions, as well as ◦ protection against interference in hazardous areas of rotating clamping devices and moving clamping elements. DURO-A RC 11 / 72...

  • Page 12: Installation/Replacement/Conversion/Change

    In principle, a risk assessment must be carried out after all modifications to 12 / 72 DURO-A RC...

  • Page 13: Qualification Of Operating And Specialist Personnel

    They have also been taught about the neces- sary safety equipment and protective measures. Personnel to be taught, trained, instructed or personnel undergoing general training may only work under the constant supervision of an experienced person. DURO-A RC 13 / 72...

  • Page 14: Personal Protective Equipment And Personnel Qualification

    ▪ Observe information on personal protective equipment posted in the working area. ▪ During rotational operation of the power chuck DURO-A RC, no pro- tective gloves are to be worn! Hand protection is only to be worn during transport, assembly and maintenance and as long as the power chuck DURO-A RC is at a standstill.

  • Page 15: General Dangers

    Dangers due to Flying Parts During operation, the connection between the clamped workpiece and the power chuck DURO-A RC may become loose due to mechanical failure (e.g. due to defective parts) or incorrect operation (e.g. excessive speed). The workpiece may then fly out and cause serious crushing and impact injuries.

  • Page 16: Risk Of Burns Due To Hot Surfaces

    With rotating spindles, clamping of imbalanced workpieces generates a centrifugal force which affects smooth running of the power chuck DURO-A RC. The power chuck DURO-A RC has a balance quality of G 6.3 as per DIN ISO 21940. Additional risks may arise due to insufficient rotational bal- ance.

  • Page 17: Dangers Due To Power Failure

    (e.g. prism) before the movement is started. ▪ or, for example, in the case of cylinders and comparable moving com- ponents, the gap must be covered by a safety guard so as to be inac- cessible. DURO-A RC 17 / 72...

  • Page 18: Procedure In The Event Of Danger And Accidents

    For lifting and transport of the power chuck, eyebolts in compliance with DIN 580 or similar load-bearing attachments must be used. 2.7.2 Modification of the power chuck NOTICE: The power chuck may only be modified after written approval by RÖHM. 18 / 72 DURO-A RC...

  • Page 19: Product Description

    Product Description | 3 Product Description About this Power Chuck 1 Base jaw 5 Basic body 2 Jaw fixing screw 6 Turning bolt 3 Chuck fixing screw 7 Lubricating nipple 4 Flange 8 Safety key DURO-A RC 19 / 72...
  • Page 20 10 Piston 14 Stop disk 11 Protective bushing 15 Pusher 12 Bushing holding screws The DURO-A RC is a power chuck with 3 adjustable jaws (1), which is used to clamp regularly and irregularly shaped workpieces. 20 / 72 DURO-A RC...
  • Page 21 (13). The piston is connected via an angled bar and a groove with three wedge bars (9). Due to the axial movement of the piston, the wedge bars (9) are moved and the attached jaws (1) carry out a radial stroke. DURO-A RC 21 / 72...

  • Page 22: Technical Specifications

    Pass Connection thread M60x1.5 M60x1.5 M75x1.5 M90x1.5 Max. actuating force Max. total clamping force Max. speed 6300 6300 6000 4700 Moment of inertia 0.063 0.07 0.148 0.35 [kg*m²] Weight without jaws 14.2 15.2 22.8 37.4 22 / 72 DURO-A RC...
  • Page 23 Connection thread M90x1.5 M110x2 M110x2 M138x2 M138x2 Max. actuating force Max. total clamp- ing force Max. speed 4700 4000 4000 3500 3500 Moment of inertia 0.36 0.85 0.92 2.37 [kg*m²] Weight without 38.1 61.2 63.3 jaws DURO-A RC 23 / 72...
  • Page 24 M60x1.5 M75x1.5 M75x1.5 M90x1.5 Max. actuating force Max. total clamp- ing force Max. speed 6300 6300 6000 6000 4700 Moment of inertia 0.071 0.083 0.165 0.183 0.37 [kg*m²] Weight without 15.9 17.5 25.9 27.7 jaws 24 / 72 DURO-A RC...
  • Page 25 Connection thread M90x1.5 M110x2 M110x2 M138x2 M138x2 Max. actuating force Max. total clamp- ing force Max. speed 4700 4000 4000 3500 3500 Moment of inertia 0.36 0.94 0.94 2.23 2.23 [kg*m²] Weight without 40.5 69.3 jaws DURO-A RC 25 / 72...

  • Page 26: Environmental And Operational Conditions

    3.2.3 Permissible Operating Materials The following grease is authorised for the power chuck DURO-A RC: ▪ RÖHM grease F 80 If a different lubricant to the one specified is used, the clamping force may be reduced considerably.

  • Page 27: Clamping Force-Speed Diagram

    The reduction in clamping force is experimentally determined with the jaw assigned to the power chuck. It is largely independent of the initial clamping force at a speed = 0. Total clamping force kN – speed rpm DURO-A RC 180 DURO-A RC 27 / 72...
  • Page 28 3 | Product Description Total clamping force kN – speed rpm DURO-A RC 215 28 / 72 DURO-A RC...
  • Page 29 Product Description | 3 Total clamping force kN – speed rpm DURO-A RC 260 Total clamping force kN – speed rpm DURO-A RC 315 Total clamping force kN – speed rpm DURO-A RC 400 DURO-A RC 29 / 72...
  • Page 30 3 | Product Description 30 / 72 DURO-A RC...

  • Page 31: Transport

    ▪ Observe information on personal protective equipment posted in the working area. ▪ During rotational operation of the power chuck DURO-A RC, no pro- tective gloves are to be worn! Hand protection is only to be worn during transport, assembly and maintenance and as long as the power chuck DURO-A RC is at a standstill.

  • Page 32: Tapped Holes For Transport Purposes

    4 | Transport Tapped Holes for Transport Purposes Size of chuck Size of tapped holes for transport purposes 260, 315, 400 32 / 72 DURO-A RC...

  • Page 33: Assembly

    ▪ Observe information on personal protective equipment posted in the working area. ▪ During rotational operation of the power chuck DURO-A RC, no pro- tective gloves are to be worn! Hand protection is only to be worn during transport, assembly and maintenance and as long as the power chuck DURO-A RC is at a standstill.

  • Page 34: Assembly On Intermediate Disk

    4. Check the jaw stroke with the capacitive proximity switch and re-ad- just if necessary. 5. Check the device for correct operation. 6. Tighten the fixing screws with the correct tightening torque (Checking the Tightness of Screw Connections [} 63]). ü The intermediate disk is assembled. 34 / 72 DURO-A RC...

  • Page 35: Disassembly / Assembly Threaded Ring / Adapter

    4. Screw in the stop disk (13) (glued in with Loctite 222, see assembly drawing) using the mounting wrench (M). 5. Carry out assembly as described in Chapter Assembly on Machine Spindle [} 38]. It must be possible to turn the threaded ring/adapter. DURO-A RC 35 / 72...
  • Page 36 M60 x 19 M75 x 19 M90 x 20 M110 x M138 x size x depth The operator or manufacturer is fully responsible for the design of the threaded ring. RÖHM assigns this responsibility to the operator or manufacturer of the threaded ring. 36 / 72 DURO-A RC...
  • Page 37 Spindle [} 38]. Alternatively: 1. Previously mount the special threaded ring/adapter with thread (12/1) for the corresponding draw connection (machine) onto the draw tube. 2. Carry out assembly as described in Chapter Assembly on Machine Spindle [} 38]. DURO-A RC 37 / 72...

  • Page 38: Assembly On Machine Spindle

    2. Move the piston of the power chuck to the rear position. 3. Screw the eyebolt into the power chuck. 4. Correctly attach the load-bearing equipment to the eyebolt. 5. Position the power chuck on the machine spindle. 38 / 72 DURO-A RC...
  • Page 39 6. Screw the threaded ring (2) of the power chuck onto the draw tube (1) as far as it will go using the assembly tool (3) provided. Ø It must be easy to turn the threaded ring (2). Otherwise, readjust the height of the crane. DURO-A RC 39 / 72...
  • Page 40 5 | Assembly 7. Move the draw tube back and screw the power chuck onto the machine spindle with three chuck holding screws (provisionally 5 Nm). 40 / 72 DURO-A RC...
  • Page 41 13. Tighten the three chuck holding screws on the machine spindle with the permissible tightening torque (Checking the Tightness of Screw Connections [} 63]). ü power chuck is mounted on the machine spindle. DURO-A RC 41 / 72...

  • Page 42: Operation

    Skin irritations due to contact with lubricants. Lubricants may cause irritations in the event of contact with the skin. Ø When handling the power chuck, wear safety goggles, long work clothes and gloves. Ø Avoid skin contact with lubricants. 42 / 72 DURO-A RC...

  • Page 43: Personal Protective Equipment And Personnel Qualification

    ▪ Observe information on personal protective equipment posted in the working area. ▪ During rotational operation of the power chuck DURO-A RC, no pro- tective gloves are to be worn! Hand protection is only to be worn during transport, assembly and maintenance and as long as the power chuck DURO-A RC is at a standstill.

  • Page 44: Basic Principles

    The actual clamping force must be checked regularly. See Checking the Device for Correct Operation [} 59]. The following values apply specifically to the power chuck DURO-A RC and are required for calculation in accordance with the Röhm Norm 1391: Chuck size Centrifugal force M 0.016...
  • Page 45 (jaw 1 in wedge bar 1, jaw 2 in wedge bar 2, jaw 3 in wedge bar 3). 1. Push the jaw into the required position until the spring bolt perceptibly locks into the tooth space. Ø The jaws must not be positioned beyond the marking. DURO-A RC 45 / 72...
  • Page 46 2. To lock the jaw, turn the safety key counter-clockwise to LOCK. 3. Remove the safety key. Ø The safety key cannot be removed as long as the jaw is not safely locked. 4. Repeat for all jaws. ü The jaws are inserted. 46 / 72 DURO-A RC...

  • Page 47: Adjusting Jaws

    4. Move the jaw to the required position until the spring bolt perceptibly locks. 5. Do not move the jaw for the minimum position so far that the sprock- ets of the wedge bar becomes visible. Ø The jaws must not be positioned beyond the marking. DURO-A RC 47 / 72...
  • Page 48 7. Remove the safety key. Ø The safety key cannot be removed as long as the jaw is not safely locked. 8. Repeat for all jaws and place in the same position. ü The jaws are adjusted. 48 / 72 DURO-A RC...

  • Page 49: Replacing Jaws

    3. To unlock the jaw, turn the safety key clockwise to UNLOCK. Ø The wedge bar moves in. Ø The jaw is unlocked. 4. Pull the jaw out of the guide. 5. Lubricate the guide with a brush. DURO-A RC 49 / 72...
  • Page 50 7. Push the jaw into the required position until the spring bolt perceptibly locks into the tooth space. Ø The jaws must not be positioned beyond the marking. 8. To lock the jaw, turn the safety key counter-clockwise to LOCK. 50 / 72 DURO-A RC...

  • Page 51: Clamping The Workpiece

    Clamping the Workpiece 1. Fully open the power chuck. Ø The jaws move to the outermost position. 2. Position the workpiece. 3. Close the power chuck. Ø The jaws fix the workpiece. ü The workpiece is clamped. DURO-A RC 51 / 72...
  • Page 52 Workpiece too heavy and jaw step Support with centre or jaw step ex- too short tended Clamping Ø too small Clamping on largest possible clamp- ing Ø Workpieces with cast iron or forged Clamping with self-seating inserts tapers 52 / 72 DURO-A RC...

  • Page 53: Cleaning The Device

    Cleaning with compressed air or a high-pressure cleaner is not permitted. Personal Protective Equipment and Personnel Qualification When working on and with the Kraftspannfutter DURO-A RC, personal pro- tective equipment must be worn. The owner is responsible for providing personal protective equipment.

  • Page 54: Maintenance

    Interval Clean the power chucks 12 h or 1x weekly, more often if ne- cessary Check the clamping jaws for damage 12 h or 1x weekly, more often if ne- and excessive wear cessary Recommendation, preventive maintenance: 54 / 72 DURO-A RC...

  • Page 55: Personal Protective Equipment And Personnel Qualification

    ▪ Observe information on personal protective equipment posted in the working area. ▪ During rotational operation of the power chuck DURO-A RC, no pro- tective gloves are to be worn! Hand protection is only to be worn during transport, assembly and maintenance and as long as the power chuck DURO-A RC is at a standstill.

  • Page 56: Maintenance Work

    Quantity of grease [strokes per lubricating nipple] Recommended grease ID no.: RÖHM lubrication gun 329093 Recommended Röhm ID no.: grease F 80 0.1 kg 630869 0.25 kg 304345 0.5 kg 308555 1.0 kg 028975 5 kg 318310 25 kg 658047 56 / 72 DURO-A RC...
  • Page 57 (for grease quantity, see table). 2. Move through the complete stroke 3-5 times. Ø The grease is distributed. Ø After 400 clamping cycles, move through the complete stroke again at least twice. ü The power chuck is lubricated. DURO-A RC 57 / 72...

  • Page 58: Lubricating Jaw Guides

    1. Lubricate the jaw guides with Röhm grease 80 using a brush. 2. Move through the complete stroke several times. Ø The grease is distributed. Ø After 400 clamping cycles, move through the complete stroke again at least twice. ü The jaw guides are lubricated. 58 / 72 DURO-A RC...

  • Page 59: Checking The Device For Correct Operation

    2. Compare the measured dimensions with the recorded dimensions (As- sembly on Machine Spindle) without installed power chuck. Ø In each end position, the clamping cylinder must have at least 1 mm stroke reserve. DURO-A RC 59 / 72...
  • Page 60 Ÿ The clamping force should be checked at regular intervals with a suitable clamping force measuring device (1). The figure shows a way in which the clamping force can be checked with the base jaw (3). 60 / 72 DURO-A RC...
  • Page 61 For this purpose, work should be carried out with a clamping force of Fmax/3. Please also pay attention to the max. permissible speed when using the reduced clamping force. This value may be reduced. DURO-A RC 61 / 72...
  • Page 62 Ÿ When setting up the clamping set (2), the concentricity (4) should be checked. One possibility is shown in the figure (1), at the top for external clamping and at the bottom for internal clamping. 62 / 72 DURO-A RC...

  • Page 63: Checking The Tightness Of Screw Connections

    In the case of mounting screws for clamp- ing devices, clamping inserts, top jaws, rigid stops, pre-clamped covers, equalising weights and comparable elements, strength class 12.9 is always to be used. DURO-A RC 63 / 72...

  • Page 64: Inspection Of The Power Chuck

    [} 35]) Observe the bolt with the spring, as it can fall out of the power chuck due to the spring force. 12. Remove the bolt and pressure spring from the power chuck. 13. Remove the pusher with the pressure spring. 64 / 72 DURO-A RC...
  • Page 65 ü The power chuck is clean. Cleaning with compressed air or a high-pressure cleaner is not permitted. Assembly of the power chuck The power chuck is assembled in reverse order. DURO-A RC 65 / 72...

  • Page 66: Storage

    If the power chuck is not in use, the power chuck is to be stored in a dry, protected place in accordance with the storage temperature (Environ- mental and Operational Conditions [} 26]). In the case of longer storage (one year or more), the power chuck must be cleaned and lubricated before assembly. 66 / 72 DURO-A RC...

  • Page 67: Troubleshooting

    The draw bar is broken. Replace draw bar. Con- tact the service depart- ment of RÖHM. The workpiece cannot The workpiece diameter Use suitable top jaws or power chuck. be inserted. is greater than the clamping diameter of the power chuck. DURO-A RC 67 / 72...

  • Page 68: Disposal

    Obtain relevant information from the authorities. ▪ Rubber (e.g. O-rings) They must be disposed of in accordance with the valid regulations and the applicable local provisions. Obtain relevant information from the authorities. 68 / 72 DURO-A RC...

  • Page 69: Notes

    Notes | 12 Notes DURO-A RC 69 / 72...
  • Page 70 12 | Notes 70 / 72 DURO-A RC...
  • Page 71 Notes | 12 DURO-A RC 71 / 72...
  • Page 72 12 | Notes 72 / 72 DURO-A RC...

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