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BRUCKNER LIVE CENTERS
HEAVY DUTY MZ AND MZR TYPE

  BOKO System Types MZ and MZR
Common Technical Features:
  • Housing - High-quality material, forged, therefore uniform grain structure, tensile strength approx. 1,000 N/mm2.  Head and shank hardened.
  • Taper Shank without Bore - therefore it is not weakened.
  • Safety Spigot (German Federal Patent) - acts as an additional safeguard when connecting the center housing to the support ring.
  • High Concentricity - see below.
  • Large precision roller bearings, free from clearance - to absorb the radial and axial force.  No bearings in the taper shank.  The bearing seats in the housing and on the rotating body have a fine tolerance and are precision ground.  The bearings and their seats are selected to fit.
  • Shaft Seal Ring - protects the bearings from dirt, dust and coolant.
     
Type MZ with expansion compensation and pressure indicator, centerpoint 60°, 75°, 90°
Technical Features:
  • Concentricity Runout
    - Type MZ  max. 0.02 mm (.007")

Applications:

  • If the axial pressure must not exceed or fall below a defined value in order to clamp the component safely or to avoid workpiece deformation
  • When machining heavy workpieces prone to heat expansion
Technical Data:
ID No. Type MZ MZ 06/ MK6 MZ 06/ M080 MZ 06/ K080 MZ 10/ M080 MZ 10/ K080 MZ 10/ M100 MZ 10/ K100 MZ 15/ M100 MZ 15/ K100
Max workpiece weight daN 4000 6000 6000 8000 8000 10,000 10,000 12,000 12,000
Max RPM 1200 1200 1200 1100 1100 1100 1100 900 900
Initial pressure daN 1000 1000 1000 1000 1000 1000 1000 3000 3000
Final pressure daN 10,000 10,000 10,000 13,000 13,000 13,000 13,000 16,000 16,000
Max travel of spring system (mm) 2 2 2 4 4 4 4 2.5 2.5

Dimensions (mm) Type MZ
ID No. Type MZ MZ06/ MK6 MZ06/ M080 MZ06/ K080 MZ10/ M080 MZ10/ K080 MZ10/ M100 MZ10/ K100 MZ15/ M100 MZ15/ K100
Taper Size MT6 metr. taper 80 1:20 taper 80 1:10 metr. taper 80 1:20 taper 80 1:10 metr. taper 100 1:20 taper 100 1:10 metr. taper 100 1:20 taper 100 1:10
d 65 65 65 90 90 90 90 100 100
D 162 162 162 210 210 210 210 230 230
IA 60º 67 67 67 88 88 88 88 95 95
75º 57 57 57 72 72 72 72 75 75
90º 52 52 52 60 60 60 60 65 65
ID 157 157 157 194 194 198 198 208 208
-When ordering, please indicate:  1) the point angle of the center

 

Type MZR with ring-support housing, centerpoint 60°, 75°, 90°
Technical Features:
  • Concentricity Runout
    - Type MZR  max. 0.02 mm (.007")

Applications:

  • If the axial pressure must not exceed or fall below a defined value in order to clamp the component safely or to avoid workpiece deformation
  • When machining heavy workpieces prone to heat expansion
Technical Data:
ID No. Type MZR MZR 06/ MK6 MZR 10/ MK6 MZR
10/ M080		 MZR 10/ K080 MZR
15/ M080		 MZR
15/ K080		 MZR 15/ M100 MZR 15/ K100
Max workpiece weight daN 6000 10,000 10,000 10,000 12,000 12,000 15,000 15,000
-Complete technical data for type MZ, MZR on request

Dimensions (mm) Type MZR
ID No. Type MZR MZR06/ MK6 MZR10/ MK6 MZR10/ M080 MZR10/ K080 MZR15/ M080 MZR15/ K080 MZR15/ M100 MZR15/ K100
Taper Size MT6 MT6 metr. taper 80 1:20 taper 80 1:10 metr. taper 80 1:20 taper 80 1:10 metr. taper 100 1:20 taper 100 1:10
E 210 230 230 230 290 290 290 290
F <160 <180 <180 <180 <220 <220 <220 <220
- When ordering, please indicate:  1) the point angle of the center, 2) for version with support ring:  tailstock sleeve diameter within 0.01 mm (.004")

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