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 Mahr

Chrome Leather Bellows
N 820

                        Suitability

                        Chrome leather bellows for covering open rotary stroke bearings.
                        • Prevents dirt particles penetrating open rotary stroke bearings.
                        • No impairment of the smooth running of the rotary stroke bearing.
                        • Customized to the installation conditions.

                        Features

                        • The relationship between the inside diameter di and the outside diameter da
                         has been selected to give the bellows good stability.

                        • Optimum contraction ratio (l/le).
                        • Unlike rubber or plastic bellows, leather bellows do not impair the smooth

                         running of the rotary stroke bearing.
                        • The natural material is resistant to most environmental influences.

                         (Caution should be exercised when using certain coolants!)

                        Material

                        • Chrome-tanned black leather
                        • Impregnated, and thus resistant to oil, water and atmospheric influences

                        Availability
                        Bellows are manufactured to order. See preferred dimensions.

                        Order Information

                        N 820/di/da/l/le  .../a for axial clamping
                                          .../r for radial clamping
                                          .../a, r for axial and radial clamping

                        dw di da                                                                      q lmax     b

                        12 22 40                                                                     0.25 500    6
                                                                                                     0.25 500    6
                        14-16             27                                                    45   0.22
                                                                                                     0.25 500    6
                                                                                                50   0.22
                                                                                                     0.25 1000   6
                        18-20             31                                                    50   0.20
                                                                                                     0.25 1500   8
                                                                                                58   0.25 1500   8
                                                                                                     0.20
                        24-25             36                                                    55   0.25 1500   8
                                                                                                     0.18
                                                                                                60   0.20 1500   8
                                                                                                     0.15
                        30-32             42                                                    65   0.20 1500  10
                                                                                                     0.15
                                          46 70                                                      0.12 1500  10
                                                                                                     0.12 1500  10
                                                                                                75

                        40-42             56                                                    80

                                                                                                85

                        50-52 68 100

                                                                                                110

                        63 80 110

                                                                                                120

                        80 100 140

                        100 120 160

                        le = l · q
                        q = factor for contracted length le

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