Our customers in the USA are managed by JW Winco. Please, use the website of JW Winco: jwwinco.com
Our customers in the USA are managed by JW Winco. Please, use the website of JW Winco: jwwinco.com
Safety handwheels GN 327 feature the ultimate in health and safety at work standards because the handwheel, if disengaged, is mounted on a fixed component, the bearing flange. The wheel is fully disengaged from the rotating shaft.
The bearing flange can also accept the bearing of the shaft via the bearing bushing (identification no. 1). This bearing bushing is a dry bearing (DU bushing). Normally, the shaft has a separate bearing and the bearing bushing serves to center the bearing flange.
Centering can also be effected by a centering ring (identification no. 2) if the appropriate bore hole has been made at the machine side. In this case there is no need for the bearing bushings and no bearing friction (heating) will occur.
RoHS
| A | Without handle |
| D | With revolving handle |
| 1 | With bearing bushing |
| 2 | With centering ring |
| d1 | d2 H7 Bore with keyway | b | l1 | l2 | r | Ø Handle |
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|---|---|---|---|---|---|---|---|---|---|
| 160 | K 14 | K 16 | K 18 | K 20 | 18 | 66 | 82,5 | 71 | 26 |
| 200 | K 14 | K 16 | K 18 | K 20 | 20,5 | 68 | 82,5 | 89 | 26 |
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Shaft bushing and countershaft pulley are delivered in two separate components. Before assembly, make sure that the shaft bushing can be pushed smoothly and free-moving over the shaft. Proper function is guaranteed only if:
Design with bearing bushing (identification no. 1): Push the handwheel and the shaft bushing at the same time over the shaft, bolt down the bearing flange, and fix the shaft bush axially with the countershaft pulley. Design with centring ring (identification no. 2): The handwheel can be bolted at once through the centring ring above the bearing flange. Then push the shaft bushing onto the shaft and fix it axially with the countershaft pulley. |
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The relevant health and safety at work provisions state that handwheels must be attached to spindles such that they are not turned along together with the machine drive assembly. Safety handwheels meet this requirement:
A number of user notices are listed below. These notices are non-binding and given without liability. They do not constitute a warranty of proper function. The user must in any case determine whether the safety handwheels are suitable for the intended purpose and use. The safety handwheels described under 1. to 3. above are characterised by the fact that they require no special machine-side measures for attaching. They are simply pushed over the shaft. However, the inevitable bearing friction generates a link between shaft and handwheel which needs to be kept in mind as specified above. |
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