MMB Hydraulic Cylinders
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MMB Hydraulic Cylinders 'Mill type' roundline cylinders for working pressures up to 160 bar

Roundline Cylinders MMB Series Series MMB 'mill type' roundline cylinders deliver continuous high performance with low whole-life costs in arduous applications such as steel mills, where a rugged, durable cylinder with a 'clean' external design is required. In addition to the standard cylinders featured in this catalogue, MMB cylinders can be designed and manufactured to suit individual customer requirements. Standard Specifications • • • • • • • • • • • • Heavy Duty construction Styles and dimensions to CETOP RP58H and ISO 6020/1 Rated pressure: 160 bar Fatigue-free at the rated pressure...

Roundline Cylinders MMB Series Design Features and Benefits Check valves at the head and cap ends of the cylinder minimize restriction to the start of a stroke, permitting full power and fast cycle times. The head end check valve is incorporated into the fully floating cushion sleeve, while the cap end employs a floating bronze cushion bush. The piston rod is manufactured from precision ground, high tensile carbon alloy steel, hard chrome plated and polished to 0.2mm max. Piston rods up to 140mm in diameter are induction case hardened to Rockwell C54 minimum before chrome plating. This...

Roundline Cylinders MMB Series Optional Features Gland and Piston Seal Options See illustrations, page 21 Exposed rod surfaces that are subjected to air hardening contaminants should be protected by rod end bellows. Longer rod extensions are required to accommodate their collapsed length – please consult the factory for details. Standard Option The standard seals fitted to MMB cylinders provide excellent low speed and break-out performance and deliver exceptional working life in high cycle applications. They may be used with all fluid groups (see page 20) at piston speeds up to 0.5m/s. As...

Roundline Cylinders MMB Series Rectangular Flange Mountings Style MF1 Head Rectangular Flange Style MF2 Cap Rectangular Flange Dimensions – MF1 and MF2 See also Rod End Dimensions, page 9 Bore Ø All dimensions are in millimetres unless otherwise stated. Parker Hannifin Cylinder Division Europe

Roundline Cylinders MMB Series Circular Flange Mountings Style MF3 Head Circular Flange Accurate location of 'B' provided as standard on model MF3 only. Style MF4 Cap Circular Flange Dimensions – MF3 and MF4 See also Rod End Dimensions, page 9 Bore Ø All dimensions are in millimetres unless otherwise stated. Parker Hannifin Cylinder Division Europe

Roundline Cylinders MMB Series Pivot Mountings Style MP5 Cap Fixed Eye with Spherical Bearing Dimensions – MP3 and MP5 See also Rod End Dimensions, page 9 + Stroke All dimensions are in millimetres unless otherwise stated. Parker Hannifin Cylinder Division Eur

Roundline Cylinders MMB Series Foot and Trunnion Mountings Style MS2 Foot Mounting Style MT4 Intermediate Fixed Trunnion Note: XV dimension to be specified by customer. Where the minimum dimension is unacceptable, please consult the factory. Dimensions – MS2 and MT4 See also Rod End Dimensions, page 9 and Trunnion Blocks, page 13 Bore Rod Rod Ø No. Ø All dimensions are in millimetres unless otherwise stated.

Roundline Cylinders MMB Series MMB cylinders are supplied with standard metric male and female rod ends to ISO 4395. They can also be supplied with other rod end threads, eg: ISO metric coarse, Unified, British Standard etc., or to the customer's special requirements. Each cylinder bore size is offered with two diameters of piston rod – the smaller is designated no. 1 and the larger, no. 2. The standard male rod end threads, to ISO 6020/1, are designated code 4 and female threads are designated code 9. D wrench flats or pin wrench holes Non-standard rod ends are designated code 3. Orders...

Roundline Cylinders MMB Series Accessories Accessory Selection The accessories and corresponding mounting brackets supplied for use at the piston rod end of a cylinder are selected by reference to the rod end thread, shown on page 9, while the same mounting brackets, when used at the cap end of pivot mounted cylinders, are selected by pin size – see dimensions CD and CX on page 7. Rod clevis and pivot pin Rod eye with plain bearing Clevis bracket and pivot pin Rod eye with spherical bearing Mounting bracket and pivot pin – page 10 – page 11 – page 11 – page 12 – page 12 To obtain the same...

Roundline Cylinders MMB Series Rod Eye with Plain Bearing AP4 ISO 8132 EM C Nominal Force Clevis Bracket and Pivot Pin AB4 ISO 8132 Form A CL CM For larger sizes, please consult factory. All dimensions are in millimetres unless otherwise stated. Parker Hannifin Cylinder Division Europe

Roundline Cylinders MMB Series Accessories Rod Eye with Spherical Bearing AP6 ISO 8132 EN C Nominal Force Mounting Bracket and Pivot Pin AB3 ISO 8132 Form B CL CM For larger sizes, please consult factory. Nominal Force All dimensions are in millimetres unless otherwise stated. Parker Hannifin Cylinder Division Eu

Roundline Cylinders MMB Series Cylinder Mounting, Masses Trunnion Block AT4 ISO 8132 CR HB For larger sizes, please consult factory. Nominal Force Cylinder Masses Cylinder Mounting Information The following table shows the masses of MMB cylinders for each mounting style at zero stroke; a stroke adder for each 10mm of stroke can then be calculated. Where applicable, accessory masses can be added to give a gross mass for the complete assembly – see pages 10-12. Mounting Bolts Mounting bolts with a strength to ISO 898/1 grade 12.9 should be used for attaching cylinders. Bolts should be torque...

Theoretical Forces Roundline Cylinders MMB Series Selecting the Cylinder Diameter Tension or 'Pull' Applications Compression or 'Push' Applications If the piston rod is in tension, use the ‘Deduction for Pull Force’ table. To determine the pull force: 1. Follow the procedure given for ‘push’ applications, as described above. 2. Using the ‘Deduction for Pull Force’ table below, establish the appropriate reduction in force. 3. Deduct this from the original ‘Push’ force. The resultant is the net force available to move the load. If this force is not large enough, repeat the process with a...