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    Series
    H4.305

    Concentric positioning and clamping elements

    2 and 3-point positioning
    hydraulically operated
    double acting
    max. operating pressure 250 bar
    Concentric positioning and clamping elements
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    Information Series
    Description
    H 4.305 Concentric positioning and clamping elements

    Workpieces with cast or machined bores, reliefs or break-outs, can be easily loaded to the fixture with the concentric positioning and clamping elements and concentrically clamped or positioned for machining. Overtolerance conditions can be avoided and clamping tasks can be completely solved by an ingenious combination of 2 and 3-point elements.

    Various mounting and connecting possibilities extend the use for multiple applications. Different sizes and correspondingly adapted contact bolts allow exact adaptation to the required clamping diameter.

    Products (48)
    clamping stroke [mm]
    type
    round centring element (48)
    functioning
    double acting (48)
    stroke end control
    no (48)
    max. operating pressure [bar]
    250 (48)
    seals
    NBR (48)
    hydraulic ports
    for drilled channels (48)
    connection for positive air pressure protection
    no (48)
    max. clamping force [kN]
    plunger Ø [mm]
    element
    interior/exterior clamping
    interior clamping (48)
    contact control
    no (48)
    clamping Ø [mm]
    Item no. CAD datatypefunctioningstroke end controlmax. operating pressure [bar]
    Item no.
    4312202
    CAD data
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    Properties
    Item no.
    4312250
    CAD data
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    Properties
    Item no.
    4312251
    CAD data
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    Properties
    Item no.
    4312252
    CAD data
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    Properties
    Item no.
    4312300
    CAD data
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    Properties
    Item no.
    4312301
    CAD data
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    Properties
    Item no.
    4312302
    CAD data
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    Properties
    Item no.
    4312350
    CAD data
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    Properties
    Item no.
    4312351
    CAD data
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    Properties
    Item no.
    4312352
    CAD data
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    Properties
    Item no.
    4312202
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    seals
    NBR
    hydraulic ports
    for drilled channels
    connection for positive air pressure protection
    no
    clamping stroke [mm]
    4.5
    max. clamping force [kN]
    17
    plunger Ø [mm]
    14
    element
    2-point element
    interior/exterior clamping
    interior clamping
    contact control
    no
    clamping Ø [mm]
    90-98
    Item no.
    4312250
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    seals
    NBR
    hydraulic ports
    for drilled channels
    connection for positive air pressure protection
    no
    clamping stroke [mm]
    4.5
    max. clamping force [kN]
    17
    plunger Ø [mm]
    14
    element
    3-point element
    interior/exterior clamping
    interior clamping
    contact control
    no
    clamping Ø [mm]
    76-84
    Item no.
    4312251
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    seals
    NBR
    hydraulic ports
    for drilled channels
    connection for positive air pressure protection
    no
    clamping stroke [mm]
    4.5
    max. clamping force [kN]
    17
    plunger Ø [mm]
    14
    element
    3-point element
    interior/exterior clamping
    interior clamping
    contact control
    no
    clamping Ø [mm]
    83-91
    Item no.
    4312252
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    seals
    NBR
    hydraulic ports
    for drilled channels
    connection for positive air pressure protection
    no
    clamping stroke [mm]
    4.5
    max. clamping force [kN]
    17
    plunger Ø [mm]
    14
    element
    3-point element
    interior/exterior clamping
    interior clamping
    contact control
    no
    clamping Ø [mm]
    90-98
    Item no.
    4312300
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    seals
    NBR
    hydraulic ports
    for drilled channels
    connection for positive air pressure protection
    no
    clamping stroke [mm]
    6
    max. clamping force [kN]
    28
    plunger Ø [mm]
    18
    element
    2-point element
    interior/exterior clamping
    interior clamping
    contact control
    no
    clamping Ø [mm]
    98-109
    Item no.
    4312301
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    seals
    NBR
    hydraulic ports
    for drilled channels
    connection for positive air pressure protection
    no
    clamping stroke [mm]
    6
    max. clamping force [kN]
    28
    plunger Ø [mm]
    18
    element
    2-point element
    interior/exterior clamping
    interior clamping
    contact control
    no
    clamping Ø [mm]
    109-120
    Item no.
    4312302
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    seals
    NBR
    hydraulic ports
    for drilled channels
    connection for positive air pressure protection
    no
    clamping stroke [mm]
    6
    max. clamping force [kN]
    28
    plunger Ø [mm]
    18
    element
    2-point element
    interior/exterior clamping
    interior clamping
    contact control
    no
    clamping Ø [mm]
    119-130
    Item no.
    4312350
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    seals
    NBR
    hydraulic ports
    for drilled channels
    connection for positive air pressure protection
    no
    clamping stroke [mm]
    6
    max. clamping force [kN]
    28
    plunger Ø [mm]
    18
    element
    3-point element
    interior/exterior clamping
    interior clamping
    contact control
    no
    clamping Ø [mm]
    98-109
    Item no.
    4312351
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    seals
    NBR
    hydraulic ports
    for drilled channels
    connection for positive air pressure protection
    no
    clamping stroke [mm]
    6
    max. clamping force [kN]
    28
    plunger Ø [mm]
    18
    element
    3-point element
    interior/exterior clamping
    interior clamping
    contact control
    no
    clamping Ø [mm]
    109-120
    Item no.
    4312352
    type
    round centring element
    functioning
    double acting
    stroke end control
    no
    max. operating pressure [bar]
    250
    seals
    NBR
    hydraulic ports
    for drilled channels
    connection for positive air pressure protection
    no
    clamping stroke [mm]
    6
    max. clamping force [kN]
    28
    plunger Ø [mm]
    18
    element
    3-point element
    interior/exterior clamping
    interior clamping
    contact control
    no
    clamping Ø [mm]
    119-130
    Accessories (22)
    Item no. CAD data Description
    Item no.
    0352762
    CAD data
    Description
    Ball nut for 4312-0XX/-1XX as per data sheet H4.300
    Item no.
    0352763
    CAD data
    Description
    Ball nut for 4312-2XX as per data sheet H4.300
    Item no.
    0352765
    CAD data
    Description
    Ball nut for 4312-3XX as per data sheet H4.300
    Item no.
    3000340
    CAD data
    /
    Description
    O-ring 5 x 1.5 mm as per data sheet C2.320
    Item no.
    3000342
    CAD data
    Description
    O-ring 7 x 1.5 mm, NBR as per data sheet B1.5091
    Item no.
    3000343
    CAD data
    Description
    O-ring 8 x 1.5 mm, NBR as per data sheet B1.5091
    Item no.
    3000663
    CAD data
    /
    Description
    O-ring 17.17 x 1.78 mm as per data sheet H4.305
    Item no.
    3000769
    CAD data
    /
    Description
    O-ring 26 x 2 mm as per data sheet H4.305
    Item no.
    3000944
    CAD data
    /
    Description
    O-ring 40.95 x 2.62 mm as per data sheet H4.305
    Item no.
    3001238
    CAD data
    /
    Description
    O-ring 33.05 x 1.78 mm as per data sheet H4.305
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    Please note: Our CAD data are generally simplified data and primarily reflect the outer contour and connections of the product (see also Terms of use). Please always refer to the relevant catalogue sheet for the exact dimensions with tolerances, in particular the information on mounting holes or attachments such as special clamps.