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Revolving lathe centre with analogue pressure indicator and extended point, Morse taper: 3
Article no.: 321740 3
Article code:
Product details
Technical Data
| Overall length | 196 mm | |
| Head diameter | 60 mm | |
| Type of centring point | tracking | |
| Point angle | 40 degrees; 60 degrees | |
| Bull-nosed taper at front | no | |
| Point length | 39 mm | |
| Mounting machine-side | MK3 | |
| With push-off thread | yes | |
| Draw-off nut included | yes | |
| With carbide tip | no | |
| With shock absorbing | yes | |
| Sprung travel | 3.7 mm | |
| Usable length | 115 mm | |
| Max. workpiece weight | 200 kg | |
| Maximum radial run-out | 0.005 mm | |
| Half centring point | no | |
| Axial force | 9.5 kN | |
| With pressure indicator | yes | |
| Use | turning | |
| Weight | 2.3 kg | |
| Standard | DIN 228 | |
| Type of product | centring drill |
Identification & Classification
| Article number | 321740 3 | |
| EAN / GTIN | 4045197947895 | |
| Manufacturer number | 321740 3 | |
| Manufacturer/responsible person | Hoffmann Supply Chain GmbH & Co. KG, Poststraße 15, 90471 Nürnberg, Germany, www.hoffmann-group.com |
Description
Version:
- The momentary clamping pressure is directly readable on the analogue or digital display on the base body.
- The live centre is supported by a disc spring pack with a spring travel of approx. 3.7 mm analogue and 2.6 mm or 2.8 mm digital.
- Short sturdy design with active longitudinal axis. Live centre through hardened and finish ground.
- Maximum accuracy due to precision roller bearings.
- With push-off thread and push-off nut.
- With special seal against dirt and coolant ingress, maintenance-free due to lifetime lubrication.
With extended centre, point angle 60°/40°.
Description:
Lathe centres are mainly used on lathes to support long and slim workpieces, since with these workpieces there would otherwise be a risk of the workpiece bending or moving around as a result of the forces generated.
The lathe centre is secured with a Morse taper. The workpiece is clamped in the chuck and a counterbore is added using a centre drill. After re-clamping, the lathe centre is then inserted.
The lathe centre is secured with a Morse taper. The workpiece is clamped in the chuck and a counterbore is added using a centre drill. After re-clamping, the lathe centre is then inserted.
Function:
IP55: Protected against jets of water from all directions and protected against penetration of dust into the inside (protected against dust), also completely protected against touching.
Application:
Whenever the clamping force should be kept within certain limits,either to prevent deformation of the component or to ensure secure clamping with sufficient pressure.
- As a tailstock centre in conjunction with hydro-mechanical face drivers No. 327451 − 327541 because the drive teeth have to dig into the component.
- For components that expand significantly due to high machining heat.
- For clamping long slender components to prevent lateral displacement.
- For clamping heavy components where a controlled clamping force is required.