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ドローダウンチャック DRAW DOWN POWER CHUCK H011MC C C C H011M H011M H011M 取扱説明書 INSTRUCTION MANUAL 重要 重要 重要 重要 IMPORTANT Be sure to read and understand this 本取扱説明書をよく読み, 内容を十分理解した instruction manual thoroughly before 上でこの製品を使用してください。 operating this product. この取扱説明書は大切に保管し, 製品の所有者 Please...
5. Please contact us (phone and fax numbers are shown below) for information regarding this manual and the objective product. Another copy of this manual is also available from the following address: HOWA MACHINERY, LTD. MACHINE TOOL ACCESSORIES TEAM SALES GROUP...
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Safety Safety Precautions Safety Safety Precautions Precautions Precautions The following precautions apply to handling, maintenance, and operation of the chuck. Read and understand them carefully before use. DANGER Never operate the rotating cylinder selector valve while the spindle is rotating. Otherwise, the gripped work piece may come off and fly out.
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(supplied from Dow Corning Corporation) For all the chuck parts including consumables, place an order with Howa Machinery, Ltd. Howa shall not be liable for any accidents caused by use of parts not supplied from Howa. Any and all warranties are invalid unless only Howa’s genuine parts are used.
1. Construction and Operation 1.1 Model Coding The draw down power chuck H011MC are model coded as follows. 3- jaw type draw down power chuck ( This chuck cannot grip the inside diameter of the work piece. ) H011MC JIS-specified spindle nose No. No mark:...
2.3 Preparations for Installation Except the direct-mount chuck of A type, a chuck adapter is needed to install the chuck onto the lathe spindle. Contact us if you need information on how to design a chuck adapter. In addition to the chuck adapter, a rotating cylinder, a cylinder adapter, a connecting rod, and either a hydraulic or pneumatic pressure source are required to operate the chuck.
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If the dimension Re is less than that indicated in Table 1, the chuck CAUTION cannot be installed. Table 1 Chuck size Re±1 (mm) 16.5 16.5 27.5 32.5 36.5 36.5 Fig. 4 Adjust the screw depth of the connecting rod (Re) to a proper WARNING length.
Fasten the chuck installing bolts with recommended tightening WARNING torque. If the torque is largely different from the recommended value, lower or higher, the bolts may break and the chuck and/or work piece may fall out; this presents a hazard that may cause severe personal injury or death to the operator or bystanders.
For all the chuck parts including consumables, place an order with WARNING Howa Machinery, Ltd. Howa assumes no responsibility for accidents caused by use of the parts not prepared by Howa. Any and all warranties are void unless only Howa genuine parts are used.
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(2) The top jaws engage with the fitting portions of the draw bar, and the arrangement is secured with the bolts. Therefore, this must not be used in areas other than specified. (3) Install the top jaws to the specified position on the draw bar using the number of bolts indicated in Table 6.
3.3 Forming Top Jaws 3.3.1 Forming Top Jaws When jaws installed, they must Fig. 9 machine-formed to align flush with the work piece. When the work piece is gripped, the jaw stroke should be such that there is one-fourth of the jaw stroke remaining, as measured from the stroke end.
3.3.2 Adjustment position of adjust screw Fig. 12 The swing angle of draw bar is controlled by steel ball and adjust screw. Set adjust screw in the position which loosens the quantity which is shown in table 9 from the position to fasten, install detent bolt in the position of the hollow of adjust screw.
The gripping force during rotation can be determined from the chart in WARNING subsection 6.2 "Gripping Force". The values shown in this chart are obtained under the following conditions. Standard soft top jaws are installed. The gripping force-measuring instrument is held at the middle of the full jaw stroke.
A failure to guard the machine as whole may lead to serious injury WARNING or death to the operator or bystanders. 3.6.1 Before Gripping Work piece Before beginning operations, check to be sure that the pneumatic WARNING or hydraulic pressure needed to operate the chuck is being supplied to the rotating cylinder.
3.6.3 During Cutting Operations In any of the following cases, the tool impact on initial cutting WARNING contact may result in an unexpected cutting force in excess of chuck workholding capacity: The back end of the work piece is away from the chuck’s stopper face.
4. Maintenance 4.1 Lubrication The most frequent cause of chuck failure is insufficient or improper lubrication. If lubrication is insufficient or if a non-specified lubricant is used, not only will wear be accelerated, the gripping force will be inadequate, with the possibility of the work piece coming off during the cutting operation.
Insufficient lubrication will lead to lower gripping force and create WARNING abnormal friction and seizure. If the cutting is done in such conditions, the work piece will come off and may cause severe injury or death to the operator and/or bystanders. Lubrication with non-specified lubricants may also permit extraordinary corrosion and/or wear and will lead to a loss of gripping force.
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WARNING Aside from damage to the chuck, the chuck will be able to maintain a constant gripping force upon a work piece assuming that the hydraulic or pneumatic operating pressures do not change. However, the ability of the chuck to hold a work piece will deteriorate with wear and tear on the surfaces of the jaws of the chuck, which will tend to reduce the coefficient of friction between the jaws and the work piece.
4.5 Parts List H011MC4, 5 Parts Name Q'ty Chuck body Pilot plate Draw screw Draw sleeve O ring Draw stud (*1) 1 Rear cover Round nut Spring Steel ball Soft top jaw Draw bar Dust seal Screw Hex. socket head bolt Hex.
5. Troubleshooting When there are any troubles with the operation of the chuck, the following causes are likely. Please check these before contacting us for service. Trouble Possible cause Recommended remedy Chuck does Damaged parts on chuck. Disassemble and repair. not operate Seizure of sliding contact part.
6. Specifications 6.1 Specifications Specifications Dimensions Series number Series H011MC H011MC number Specifications Symbol Jaw movement (Dia.) 10.8 10.8 Plunger stroke (Cylinder stroke) Min. Max. Recommended outside chucking diameter for standard soft jaws Min. Max. Speed r/min 3500 3500 3500 3000 2500 2000...
6.2 Gripping Force The following graph shows the gripping force of the rotating chuck equipped with the standard soft jaws. 6.3 Standard Soft Jaws The following table shows the dimensions of standard soft jaws. C1 Type C2 Type Weight Chuck J 1 0 J 1 1 J 1 2...
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