Increase Productivity At An Economy Price With The Unique Precision Chuck From CENTAUR

The µmatic high precision chuck is designed specifically to meet the demands of today’s new generation of machines and cutting tools. µmatic’s powerful clamping force and ability to hold tools within 50 millionths T.I.R. eliminate the need for expensive hydraulic chucks and conventional milling chucks.

Centaur’s innovative µmatic chuck features clamping surfaces ground directly from the toolholder body. Holding a cutting tool within 0.0002” T.I.R. is achieved with no adjustments.
µmatic incorporates truing screws that contact the tool shank directly, permitting rapid adjustments to within 50 millionths — either on a presetter or in the machine spindle.

µmatic is ideal for rough milling and finish milling. And because of µmatic’s unusually high accuracy, it is perfectly suited for holemaking applications that normally require hydraulic chuck or boring operations.

The µmatic high precision chuck ensures greater workpiece accuracy, while delivering increased feed rates and tool life.

The bottom line: Increased productivity.

Features and Benefits:

  • PATENTED, VIBRATION-DAMPING STRUCTURE. Centaur’s µmatic interrupts the transmission of helical vibrations to allow increased RPM and feed rates.
  • GUARANTEED HIGH ACCURACIES. Tools clamp within 0.0002” T.I.R. with no adjustment. Truing screws that contact directly to the tool shank can be set easily and quickly to achieve T.I.R. within 50 millionths.
  • IDEAL FOR TODAY’S FINEST MACHINE TOOLS. µmatic is balanced to 22,000 RPM and is sealed for coolant-through applications.
  • LOCKING SCREW. In addition to exerting extremely powerful clamping forces, the µmatic high precision chuck is equipped with a Weldon type screw to eliminate tool pullout common with standard heavy duty milling chucks.
  • DELIVERY FROM STOCK. µmatic chucks are shipped directly from Centaur’s huge U.S.-based inventory in all standard sizes. CAT/V-Flange, BT and HSK shanks are available. 40 taper toolholders have a capacity to 1-1/2” endmills; 50 taper to 2”.
  • VALUE PRICING. µmatic high precision chucks can replace expensive hydraulic chucks and heavy duty milling chucks, yet are available from Centaur at a fraction of the cost.

CAT/V-FLANGE SPECIFICATIONS

Part No. Shank d D D1 L L1
(mm.) (in.) (mm.) (in.) (mm.) (in.) (mm.) (in.)
C40UM0250
C40UM0312
C40UM0375
C40UM0437
C40UM0500
C40UM0625
C40UM0750
C40UM0875
C40UM1000
C40UM1125
C40UM1250
CAT40
CAT40
CAT40
CAT40
CAT40
CAT40
CAT40
CAT40
CAT40
CAT40
CAT40
0.250”
0.312”
0.375”
0.437”
0.500”
0.625”
0.750”
0.875”
1.000”
1.125”
1.250”
28.5
28.5
35.5
38
38
42.5
48.5
50.5
61.5
64
70
1.122
1.122
1.398
1.496
1.496
1.673
1.909
1.988
2.421
2.520
2.756
37.5
37.5
44.5
44.5
44.5
49.5
54.5
56.5
68.5
68.5
73.5
1.476
1.476
1.752
1.752
1.752
1.949
2.146
2.224
2.697
2.697
2.894
86
86
96
96
96
98
100
100
106
106
114
3.386
3.386
3.780
3.780
3.780
3.858
3.937
3.937
4.173
4.173
4.488
25
25
31.5
31.5
31.5
32.5
34.5
34.5
39
39
43.5
0.984
0.984
1.240
1.240
1.240
1.280
1.358
1.358
1.535
1.535
1.713
C50UM0250
C50UM0312
C50UM0375
C50UM0500
C50UM0625
C50UM0750
C50UM0875
C50UM1000
C50UM1125
C50UM1250
CAT50
CAT50
CAT50
CAT50
CAT50
CAT50
CAT50
CAT50
CAT50
CAT50
0.250”
0.312”
0.375”
0.500”
0.625”
0.750”
0.875”
1.000”
1.125”
1.250”
28.5
28.5
35.5
38
42.5
48.5
50.5
61.5
64
70
1.122
1.122
1.398
1.496
1.673
1.909
1.988
2.421
2.520
2.756
37.5
37.5
44.5
44.5
49.5
54.5
56.5
68.5
68.5
73.5
1.476
1.476
1.752
1.752
1.949
2.146
2.224
2.697
2.697
2.894
86
86
96
96
98
100
100
106
106
114
3.386
3.386
3.780
3.780
3.858
3.937
3.937
4.173
4.173
4.488
25
25
31.5
31.5
32.5
34.5
34.5
39
39
43.5
0.984
0.984
1.240
1.240
1.280
1.358
1.358
1.535
1.535
1.713

BT SPECIFICATIONS

Part No. Shank d D D1 L L1
(mm.) (in.) (mm.) (in.) (mm.) (in.) (mm.) (in.)
B40UM0250
B40UM0312
B40UM0375
B40UM0437
B40UM0500
B40UM0625
B40UM0750
B40UM0875
B40UM1000
B40UM1125
B40UM1250
BT40
BT40
BT40
BT40
BT40
BT40
BT40
BT40
BT40
BT40
BT40
0.250”
0.312”
0.375”
0.437”
0.500”
0.625”
0.750”
0.875”
1.000”
1.125”
1.250”
28.5
28.5
35.5
38.0
38.0
42.5
48.5
50.5
61.5
64.0
70.0
1.122
1.122
1.398
1.496
1.496
1.673
1.909
1.988
2.421
2.520
2.757
37.5
37.5
44.5
44.5
44.5
49.5
54.5
56.5
68.5
68.5
73.5
1.476
1.476
1.752
1.752
1.752
1.949
2.146
2.224
2.697
2.697
2.894
78
78
88
88
88
90
92
92
98
98
106
3.071
3.071
3.465
3.465
3.465
3.543
3.622
3.622
3.858
3.858
4.173
25.0
25.0
31.5
31.5
31.5
32.5
34.5
34.5
39.0
39.0
43.5
0.984
0.984
1.240
1.240
1.240
1.280
1.358
1.358
1.535
1.535
1.713
B50UM0250
B50UM0312
B50UM0375
B50UM0500
B50UM0625
B50UM0750
B50UM0875
B50UM1000
B50UM1125
B50UM1250
BT50
BT50
BT50
BT50
BT50
BT50
BT50
BT50
BT50
BT50
0.250”
0.312”
0.375”
0.500”
0.625”
0.750”
0.875”
1.000”
1.125”
1.250”
28.5
28.5
35.5
38.0
42.5
48.5
50.5
61.5
64.0
70.0
1.122
1.122
1.398
1.496
1.673
1.909
1.988
2.421
2.520
2.756
37.5
37.5
44.5
44.5
49.5
54.5
56.5
68.5
68.5
73.5
1.476
1.476
1.752
1.752
1.949
2.146
2.224
2.697
2.697
2.894
89
89
99
99
99
101
101
109
109
127
3.504
3.504
3.898
3.898
3.898
3.976
3.976
4.291
4.291
5.000
25.0
25.0
31.5
31.5
32.5
34.5
34.5
39.0
39.0
43.5
0.984
0.984
1.240
1.240
1.280
1.358
1.358
1.535
1.535
1.713

HSK SPECIFICATIONS

Part No. Shank d D D1 L L1
(mm.) (in.) (mm.) (in.) (mm.) (in.) (mm.) (in.)
H63AUM0250
H63AUM0312
H63AUM0375
H63AUM0500
H63AUM0625
H63AUM0750
H63AUM0875
H63AUM1000
H63AUM1125
H63AUM1250
HSK63
HSK63
HSK63
HSK63
HSK63
HSK63
HSK63
HSK63
HSK63
HSK63
0.250”
0.312”
0.375”
0.500”
0.625”
0.750”
0.875”
1.000”
1.125”
1.250”
28.5
28.5
35.5
38.0
42.5
48.5
50.5
61.5
64.0
70.0
1.122
1.122
1.398
1.496
1.673
1.909
1.988
2.421
2.520
2.756
37.5
37.5
44.5
44.5
49.5
54.5
56.5
68.5
68.5
73.5
1.476
1.476
1.752
1.752
1.949
2.146
2.224
2.697
2.697
2.894
87
87
97
97
99
101
101
114
114
124
3.425
3.425
3.819
3.819
3.898
3.976
3.976
4.488
4.488
4.882
25.0
25.0
31.5
31.5
32.5
34.5
34.5
39.0
39.0
43.5
0.984
0.984
1.240
1.240
1.280
1.358
1.358
1.535
1.535
1.713