Stitched construction are especially designed for ball screws, shafts, columns and spindles. Our Round bellows have a very stable form and stay perfectly in shape, which makes them suitable for long-term, highly demanding applications.
Our special design guarantees maintenance free operations. Round bellows joints with flange and/or sleeve are possible. Please indicate the working application position (horizontal, vertical) and the spindle diameter.
The inner diameter of the concertina shall be 10 mm larger than the diameter of the protected spindle (shaft).
Standard material is GN 807 (high tensile strength chemical fiber tissue with PU-coating). Temperature resistant from -40oC/14oF to +120oC/274oF. For use at high temperatures and in an welding application, aluminized fiberglass tissue resistant up to +450oC/870oF is used.
| AD = Outer diameter | ID = Inner diameter | |
| FB = Width of fold | FZD = Contruction per fold | |
| FHub = Lift per fold | Lmin. = Minimal compression | |
| Lmax. = Maximal extension |
| Ad in mm | Ad in Inch | Id in mm | Id in Inch | FB in mm | FB in Inch | FAZ in mm | FAZ in Inch | FZd in mm | FZd in Inch | FStroke in mm | FStroke in Inch |
| 50 | 1,97 | 25 | 0,98 | 12,5 | 0.49 | 10 | 0.39 | 2.5 | 0.10 | 7,5 | 0.30 |
| 72 | 2,83 | 33 | 1.30 | 19.5 | 0.77 | 18 | 0.71 | 2.5 | 0.10 | 15.5 | 0.61 |
| 85 | 3.35 | 45 | 1.77 | 20 | 0.79 | 18 | 0.71 | 2.5 | 0.10 | 15.5 | 0.61 |
| 95 | 3.74 | 53 | 2.09 | 21 | 0.83 | 18 | 0.71 | 2.5 | 0.10 | 15.5 | 0.61 |
| 100 | 3.94 | 63 | 2.48 | 18.5 | 0.73 | 18 | 0.71 | 2.5 | 0.10 | 15.5 | 0.61 |
| 120 | 4.72 | 82 | 3.23 | 19 | 0.75 | 18 | 0.71 | 2.5 | 0.10 | 15.5 | 0.61 |
| 122 | 4.80 | 76 | 2.99 | 23 | 0.91 | 15 | 0.59 | 2.5 | 0.10 | 12.5 | 0.49 |
| 130 | 5.12 | 90 | 3.54 | 20 | 0.79 | 18 | 0.71 | 2.5 | 0.10 | 12.5 | 0.49 |
| 140 | 5.51 | 102 | 4.02 | 19 | 0.75 | 18 | 0.71 | 2.5 | 0.10 | 15.5 | 0.61 |
| 145 | 5.71 | 93 | 3.66 | 26 | 1.02 | 15 | 0.59 | 2.5 | 0.10 | 12.5 | 0.49 |
| 145 | 5.71 | 105 | 4.13 | 20 | 0.79 | 18 | 0.71 | 2.5 | 0.10 | 15.5 | 0.61 |
| 150 | 5.91 | 110 | 4.33 | 20 | 0.79 | 18 | 0.71 | 2.5 | 0.10 | 15.5 | 0.61 |
| 160 | 6.30 | 112 | 4.41 | 24 | 0.94 | 18 | 0.71 | 2.5 | 0.10 | 15.5 | 0.61 |
| 170 | 6.69 | 125 | 4.92 | 22.5 | 0.89 | 18 | 0.71 | 2.5 | 0.10 | 15.5 | 0.61 |
We have one of the largest selections of Moulded Leather-Bellows in the world. We can currently offer 50.000 different types and styles. All bellows are made of a special composition of PVC-materials. These bellows can be used within a normal temperature range of -20o;C//22o;F and +80oC/200oF. They offer an excellent seal and protection against dust. We also manufacture soft pvc bellows according to your specifications. Die costs are moderate.
Following tables show the different types available
 Sewn Round Bellows |  Heat Formed Round Bello |  Thermic-Flex™ Round Bellow |
| Type | Inner Diameter dA in mm | Inner Diameter dA in Inch | Outer Diameter dA in mm | Outer Diameter dA in Inch | Lmin per fold in mm | Lmin per fold in Inch | Lmax per fold in mm | Lmax per fold in Inch |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Type | Inner Diameter dA in mm | Inner Diameter dA in Inch | Outer Diameter dA in mm | Outer Diameter dA in Inch | Lmin per fold in mm | Lmin per fold in Inch | Lmax per fold in mm | Lmax per fold in Inch |
| 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 |
| Type | Inner Diameter dA in mm | Inner Diameter dA in Inch | Outer Diameter dA in mm | Outer Diameter dA in Inch | Lmin per fold in mm | Lmin per fold in Inch | Lmax per fold in mm | Lmax per fold in Inch |
| 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 | 1 |
| Type | Inner Diameter dA in mm | Inner Diameter dA in Inch | Outer Diameter dA in mm | Outer Diameter dA in Inch | Lmin per fold in mm | Lmin per fold in Inch | Lmax per fold in mm | Lmax per fold in Inch |
| 41 | 51 | 61 | 7 | 8 | 9 | 0 | 1 | 2 |
Ph : 0422-4355328