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[Type 291]
Type 291		 Hydraulic Collet-Chucks
For direct clamping of tool shanks
Ideal for direct clamping of tool
shanks acc. to DIN 6535 shape HA
and HB and DIN 1835 shape A and
B with a shank tolerance h6 and
Ramin of 0.3µm. Tool shanks acc.
DIN 6353 shape HE are supposed
to be clamped with the use of
reduction inserts.

Shape HA and A = smooth shanks dia. 6 to 32mm.
Shape HB and B = cylinder shanks with lateral driver (Weldon) dia. 6 to 32 mm.
Shape HE = cylinder shanks with inclined clamping area (Whistle Notch)
dia. 6 to 20 mm.
Recommendation: only in connection with a
reduction insert.

Mechanics:
By actuation of a clamping
screw a clamping piston will
force the hydraulic fluid into
a thin walled expansion
chamber under high pressure.
It expands similar to a
diaphragm and embraces the
tool shank centrical under
high clamping forces.		 Effect:
The Hydraulic clamping
system has choking effects.
Microfractures at the cutting
edges of the tools caused by
vibrations of mechanical
clamping systems will be
avoided by the expansion
clamping system.

[Type 291] Features:
- Safe clamping function and
securance of the minimal
insertion depth due to the
adjustment stroke limitation
of the adjustment screw.
- Large adjustment stroke of
the adjusting screw.
- No invasion of chips, dirt
or coolant due to closed
clamping circuit.
- Due to special design of the
clamping bore insensitive to
oily shanks.
- Due to stroke limitation of
the clamping screw no risk
of overexpansion of the
expansion sleeve.
- Ideal central coolant supply via central hole in the adjusting screw.
- The fully enclosed tool shank in the clamping bore allowes no loss
of coolant.
- The centrical clamping of smooth cylindrical shanks guarantees the
highest concentricity and repeatability of 0.003 mm.
- Safe torque transmission even at high speeds.

 [Type 291-00 DIN 69871 form AD+B]

Type 291-00
DIN 69871
form AD+B
with coolant feed
Taper Part No. Ø d1 d2 d3 A I1 I2 I3 g approx
weight
SK/SA 40 576030 6 26 50 68 27 49 33 M5 1.4 kg
SK/SA 40 576031 8 28 50 68 27 49 33 M6 1.4 kg
SK/SA 40 576032 10 30 50 72 32 53 37 M8 1.4 kg
SK/SA 40 576033 12 32 50 77 37 58 42 M10 1.4 kg
SK/SA 40 576034 14 34 50 77 37 58 42 M10 1.4 kg
SK/SA 40 576035 16 38 50 80 42 61 43 M12 1.3 kg
SK/SA 40 576036 18 40 50 80 42 61 43 M12 1.5 kg
SK/SA 40 576037 20 42 50 82 42 63 47 M16 1.5 kg
SK/SA 40 576038 25 50 63 117 48 98 51 M20 1.6 kg
SK/SA 40 576039 32 60 63 117 52 98 56 M20 1.7 kg
Taper Part No. Ø d1 d2 d3 A I1 I2 I3 g approx
weight
SK/SA 50 576040 6 26 80 68 27 49 33 M5 3.8 kg
SK/SA 50 576041 8 28 80 68 27 49 33 M6 3.8 kg
SK/SA 50 576042 10 30 80 72 32 53 37 M8 3.8 kg
SK/SA 50 576043 12 32 80 77 37 58 42 M10 3.9 kg
SK/SA 50 576044 14 34 80 77 37 58 42 M10 3.9 kg
SK/SA 50 576045 16 38 80 80 42 61 45 M12 4.0 kg
SK/SA 50 576046 18 40 80 80 42 61 45 M12 4.0 kg
SK/SA 50 576047 20 42 80 82 42 63 47 M16 4.1 kg
SK/SA 50 576048 25 50 80 87 48 68 52 M20 4.2 kg
SK/SA 50 576049 32 60 80 91 52 72 56 M20 4.3 kg

Adjusting screws   [Adjusting screws]
Ø d1 Part No.   Ø d1 Part No.  
6 576019 M5x14 16 576023 M12x19
8 576020 M6x14 18 576023 M12x19
10 576021 M8x14 20 581359 M16x20
12 576022 M10x19 25 581399 M20x22
14 576022 M10x19 32 581399 M20x22

    [Type 291-02 DIN 69871 form AD+B]

Type 291-02
DIN 69871
form AD+B
with coolant feed
Taper Part No. Ø d1 d2 d3 A I1 I2 I3 g approx
weight
SK/SA 40 576050 20 40 50 64.5 45 42 10 M10x1 1.2 kg
SK/SA 50 576051 32 56 72 81 62 52 10 M16x1 3.9 kg

Adjusting screws
for heavy design
[Adjusting screws]
d1 Part No.
20 850155
32 850156

Hexagon Key
[Hexagon Key]
SW Part No. length
4 367665 100

    [Type 291-01 DIN 69871]

Type 291-01
DIN 69871
for tool-sharpening
and grinding
machines WZS
Taper Part No. Ø d1 d2 d3 d4 A I1 I2 I3 g approx
weight
SK/SA 40 576052 20 28 42 49.5 110 95 30 41 M10x1 1.6 kg
SK/SA 50 576053 20 28 42 70 110 95 30 41 M16x1 3.9 kg
SK/SA 50 576054 22 30 44 70 110 95 32 43 M16x1 3.9 kg
SK/SA 50 576055 32 40 54 70 110 95 45 56 M16x1 4.0 kg

    [Type 291-03 MAS BT form AD+B]

Type 291-03
MAS BT
form AD+B
with coolant feed
Taper Part No. Ø d1 d2 d3 A I1 I2 I3 g
BT 40 576142 6 26 50 90 63 27 43.0 M5
BT 40 576143 8 28 50 90 63 27 43.5 M6
BT 40 576144 10 30 50 90 63 32 44.0 M8
BT 40 576145 12 32 50 90 63 37 44.5 M10
BT 40 576146 14 34 50 90 63 37 47.5 M10
BT 40 576147 16 38 50 90 63 42 47.5 M12
BT 40 576148 18 40 50 90 63 42 47.5 M12
BT 40 576149 20 42 50 90 63 42 47.5 M12
BT 40 576150 25 50 50 90 51 48 51.0 M12
Taper Part No. Ø d1 d2 d3 A I1 I2 I3 g
BT 50 576151 6 26 80 110 72 27 43.0 M5
BT 50 576152 8 28 80 110 72 27 43.5 M6
BT 50 576153 10 30 80 110 72 32 44.0 M8
BT 50 576154 12 32 80 110 72 37 42.0 M10
BT 50 576155 14 34 80 110 72 37 42.0 M10
BT 50 576156 16 38 80 110 72 42 45.0 M12
BT 50 576157 18 40 80 110 72 42 45.0 M12
BT 50 576158 20 42 80 110 72 42 47.5 M12
BT 50 576159 25 50 80 110 72 48 47.5 M12
BT 50 576160 32 60 80 110 72 52 47.5 M12

    [Type 291-02 MAS BT form AB+B]

Type 291-02
MAS BT
form AB+B
short, heavy design,
with coolant feed
Taper Part No. Ø d1 d2 d3 A I2 I3 g
BT 40 576161 20 40 49.5 72.5 45.5 52 M10x1
BT 50 576162 32 56 72 90 52 65 M10x1

    [Type 291-04 DIN 2080]

Type 291-04
DIN 2080
Taper Part No. Ø d1 d2 A I2 I3 g
SK/SA 40 576163 6 26 49 37 31 M5
SK/SA 40 576164 8 28 49 37 31 M6
SK/SA 40 576165 10 30 53 41 35 M8
SK/SA 40 576166 12 32 58 46 40 M10
SK/SA 40 576167 14 34 58 46 40 M10
SK/SA 40 576168 16 38 61 49 43 M12
SK/SA 40 576169 18 40 61 49 43 M12
SK/SA 40 576170 20 42 63 51 45 M12
Taper Part No. Ø d1 d2 A I2 I3 g
SK/SA 50 576171 6 26 53 37 31 M5
SK/SA 50 576172 8 28 53 37 31 M6
SK/SA 50 576173 10 30 57 41 35 M8
SK/SA 50 576174 12 32 62 46 40 M10
SK/SA 50 576175 14 34 62 46 40 M10
SK/SA 50 576176 16 38 65 49 43 M12
SK/SA 50 576177 18 40 65 49 43 M12
SK/SA 50 576178 20 42 67 51 45 M12
SK/SA 50 576179 25 50 72 56 50 M12
SK/SA 50 576180 32 60 76 60 54 M12

    [Type 291-05 DIN 69880 VDI]

Type 291-05
DIN 69880 VDI
vibration
absorbing
Shaft Ø Part No. Ø d1 d2 A I2 I3
30 576181 6 26 49 33 90
30 576182 8 28 49 33 90
30 576183 10 30 49 33 90
30 576184 12 32 54 38 95
30 576185 14 34 54 38 95
30 576186 16 38 89 73 130
30 576187 18 40 89 73 130
30 576188 20 42 89 73 130
30 576189 25 50 94 78 95
30 576190 32 60 94 78 95
Shaft Ø Part No. Ø d1 d2 A I2 I3
40 576191 6 26 55 33 90
40 576192 8 28 55 33 90
40 576193 10 30 55 33 90
40 576194 12 32 60 38 95
40 576195 14 34 60 38 95
40 576196 16 38 95 73 130
40 576197 18 40 95 73 130
40 576198 20 42 95 73 130
40 576199 25 50 95 73 130
40 576200 32 60 95 78 95

    No matter if HSS or Carbide boring bars, you'll solve your
    vibration problems of internal and external machining by
    using the RÖHM-VDI Hydraulic Expansion Chucks.

    - New internal and external machining possible
    - Life enchancement of your cutting edges
    - Reduction of setup cost due to short adjustment times
    - Less needs of tool changing comming with higher operation
    security during machining

    Vibration choking clamping of smaller boring bars with dia.
    6, 8, 10, 12, 14, 16 with the aid of reduction sleeves.


    [Type 291-10 DIN 69893 HSK A] Type 291-10
DIN 69893 HSK A
for automatic tool-
change, with central
coolant supply by
means of adjusting
screw
HSK-A Part No. Ø d1 d2 d3 A I2 I3 I5 g approx
weight
HSK A 32 576056 6 26 26 80 60 27 60 M5 0.3 kg
HSK A 32 576057 8 28 26 80 60 27 45 M6 0.3 kg
HSK A 32 576058 10 30 26 85 65 32 50 M6 0.5 kg
HSK A 32 576059 12 32 26 90 70 37 55 M6 0.6 kg
HSK-A Part No. Ø d1 d2 d3 A I2 I3 I5 g approx
weight
HSK A 40 576060 6 26 34 80 60 27 35 M5 0.4 kg
HSK A 40 576061 8 28 34 80 60 27 36 M6 0.5 kg
HSK A 40 576062 10 30 34 85 65 32 41 M6 0.6 kg
HSK A 40 576063 12 32 34 90 70 37 47 M6 0.7 kg
HSK-A Part No. Ø d1 d2 d3 A I2 I3 I5 g approx
weight
HSK A 50 576064 6 26 42 80 54 27 35 M5 0.5 kg
HSK A 50 576065 8 28 42 80 54 27 36 M6 0.5 kg
HSK A 50 576066 10 30 42 85 59 32 41 M8 0.6 kg
HSK A 50 576067 12 32 42 90 64 37 47 M8 0.8 kg
HSK A 50 576068 14 34 42 90 64 37 49 M10 0.8 kg
HSK A 50 576069 16 38 42 95 69 42 52 M10 0.8 kg
HSK A 50 576070 18 40 42 95 69 42 52 M10 0.9 kg
HSK A 50 576071 20 42 42 100 74 42 74 M10 0.9 kg
HSK-A Part No. Ø d1 d2 d3 A I2 I3 I5 g approx
weight
HSK A 63 576072 6 26 50 80 54 27 33 M5 0.9 kg
HSK A 63 576073 8 28 50 80 54 27 33 M6 0.9 kg
HSK A 63 576074 10 30 50 85 59 32 39 M8 1.0 kg
HSK A 63 576075 12 32 50 90 64 37 44 M10 1.3 kg
HSK A 63 576076 14 34 50 90 64 37 46 M10 1.6 kg
HSK A 63 576077 16 38 50 95 69 42 52 M12 1.8 kg
HSK A 63 576078 18 40 50 95 69 42 52 M12 2.0 kg
HSK A 63 576079 20 42 50 100 74 42 58 M12 2.4 kg
HSK A 63 576080 25 50 50 120 94 48 94 M12 2.6 kg
HSK A 63 576081 32 60 50 125 99 52 83 M12 2.8 kg
HSK-A Part No. Ø d1 d2 d3 A I2 I3 I5 g approx
weight
HSK A 100 576082 6 26 63 85 56 27 29 M5 0.7 kg
HSK A 100 576083 8 28 63 85 56 27 29 M6 0.8 kg
HSK A 100 576084 10 30 63 90 61 32 35 M8 0.9 kg
HSK A 100 576085 12 32 63 95 66 39 40 M10 0.9 kg
HSK A 100 576086 14 34 63 95 66 39 42 M10 1.2 kg
HSK A 100