Pneumatic three jaws parallel grippers
series MCHG2
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Pneumatic grippers are used for accurate object handling in automated operation. Three jaws grippers are used for handling with rotary objects. Wide size range warrants use for small as well as for heavy objects. Grippers are delivered with magnet as option.
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Order codes |
Technical data | Dimensions | Data sheet (PDF) |
Technical information |
Technical data
Working pressure | 0,5 MPa |
Min. pressure | 0,2 MPa for ø16 and 25 mm 0,1 MPa for ø32 and more mm |
Max. pressure | 0,6 MPa |
Temperature range | -5oC to +60oC |
Working medium | modified compressed air |
Piston diameter | 16 | 20 | 25 | 32 | 40 | 50 | 63 | 80 | 100 | 125 |
Clamping force at 0,5 MPa [N] at closing / opening * | 14 / 16 | 25 / 28 | 42 / 47 | 74 / 82 | 118 / 130 | 187 / 204 | 335 / 359 | 500 / 525 | 750 / 780 | 1270 / 1320 |
Finger stroke [mm] | 4 | 4 | 6 | 8 | 8 | 12 | 16 | 20 | 24 | 32 |
Connection | M3 | M5 | M5 | M5 | M5 | M5 | M5 | G1/8" | G1/4" | G3/8" |
Max. frequency of clamping [number of cycles per minute] | 120 | 60 | 30 | |||||||
Repeatability [mm] | ±0,01 | |||||||||
Weight [g] | 80 | 110 | 150 | 240 | 400 | 540 | 1020 | 1880 | 3300 | 6200 |
Calculation of gripping force
Calculation of gripping force
The gripping force should be severalfold higher than weight of gripping workpiece. If we will think about sagety factor a=4, then results from the formula F=a.(m.g)/(n.µ) for n=3 (number of gripping fingers) and µ=0,1 (griction factor), F=4.(m.g)/(3.0,1)=13,33(m.g), for µ=0,2 then results F=6,67.(m.g). So the gripping force should be 6 to 12 times bigger than the weight of gripped workpiece, as to not drop the workpiece during the handling becose of acceleartion/deceleration and shocks. If the friction factor µ is bigger than 0,2, it is reccomended to select a gripping force in the same range in this case too, it means 6 to 13 times to the weight of workpiece. Above mentioned results from model example, visible on the picture at the right side, where: |
Effective gripping force, holding point
- work should be held at a point withing the range for a given pressure indicated in the effective holding force graphs shown below.
- when the workpiece is held at a point outside of the recommended range for a give pressure, an excessive unbalanced load is applied to the finger sliding section, causing excessive play of the fingers and may cause permature failure
External gripping |
Internal gripping |
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- force, mentioned in the fraphs represent gripping force of one finger when all fingers are in contact with the workpiece
External gripping | Internal gripping | |
External gripping | Internal gripping | External gripping | Internal gripping | |||
Constructions / materials
- body, piston, end cap: aluminium alloy
- cam, finger: carbon steel
- end plate, screw: stainless steel
- sealings: NBR