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Shaft Connections Shaft rigid joints
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SHAFT RIGID JOINTS

RULAND NOMAR RIGID JOINTS

RULAND Nomar rigid joints, part of the Techdrives shaft coupling range, connect shafts of equal diameter rigidly and without backlash.  Shaft diameters are from 6 to 50 mm.  A precision clamping action prevents shaft damage.

The one-piece rigid coupling wraps around the shaft, providing high torsional holding power without the shaft damage and fretting inherent when set screw style couplings are used. The two-piece rigid coupling has the additional benefit of allowing for disassembly and maintenance without removal of other components. The two-piece design also features an opposite half shaped for dynamic balancing.


Extra steps are taken in the manufacture of rigid couplings to provide important performance benefits. As one of these steps, the bores of Ruland straight bore rigid shaft couplings are precision honed. Honing of the bores provides several benefits that enhance the overall performance of the rigid coupling. Applications that require strict control of shaft alignment benefit greatly from honing, which assures both bores are collinear. Honing also corrects any residual distortions caused by stresses introduced during the manufacturing process, resulting in a round, precisely sized bore. Proper sizing and geometry assures a large percentage of shaft contact and greater torque transmission ability.


Rigid couplings come with Ruland's unique Nypatch® socket head cap screws for increased performance and reliability. Nypatch® is a proprietary process that involves depositing a 360 degree coating of Nylon on several threads of the socket head cap screws. This coating is designed to reduce screw vibration, which can cause the screws to loosen and torque transmission ability to diminish during the course of normal use. The Nylon also provides the necessary dissimilar material to reduce galling of the screw threads in stainless steel rigid couplings.


Type:  Rigid shaft coupling, zero misalignment capacity.

Construction:   Machined in either mild or stainless steel with a one piece split or two piece clamping design.  From 6 to 15 mm joints have a plain bore, from 16 to 50 mm there is a keyway

Dimensions.

Shaft Diameter

Outside
Diameter

Width

Clamp
Screw

Keyway
width

3
8
10

18
24
29

30
35
45

M3
M3
M4

-
-
-

12
14
15

29
34
34

45
50
50

M4
M5
M5

-
-
-

16
20
25

34
42
45

50
65
75

M5
M6
M6

5
6
8

30
35
40
50

53
67
77
85

83
95
108
124

M6
M8
M8
M10

8
10
12
14

See catalogue pages for more information

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shaft rigid joints