Disc/Element Couplings (Bibby)
These couplings are designed for use on general applications. The units are offered as standard, but can also be modified to incorporate options including torque limitation, torque measurement, etc.
The arrangement maybe adapted to permit connection to machines by any conventional form.
Specific notes
The following section outlines data for the standard disc couplings for general purpose use. The following points should be noted in relation to these products:
- DS units will accept angular & axial misalignment only. If radial misalignment is expected, D or DJ units should be considered.
- DJ units consist of factory assembled transmission units. Installation involves fitting this transmission unit between the hubs and tightening the attachment screws only. This leads to easier and more rapid installation.
- Variations in DBSE are available to suit customers requirements. For long spans, fabricated steel spacers are available (designation DJCT). The composite shaft, DJCFT, units may be considered.
- Maximum speeds are shown for standard materials. When higher speeds are required, consideration should be given to the high performance, HS, range of units.
- Momentary overloads of 2x and shock loads of 3.7x the stated rating are accepted by these units.
- Larger rated units are available by special design. Please contact our staff for more information.
- Misalignment data
Materials
The following materials of construction are used in the General Purpose disc couplings as shown in bold. Alternative materials are available as indicated in italics.
If there is a specific requirement for a material not shown below, please contact our design team for discussion.
Hubs: Carbon Steel
Alloy Steel
Stainless Steel
Spacers: Carbon Steel
Alloy Steel
Stainless Steel
Titanium Alloy
Aluminium Alloy
DJ Adaptors: Carbon Steel
Alloy Steel
Discs: Stainless Steel (301)
Inconel
Monel
Bolts: Alloy Steel
Stainless Steel
Inconel
Nuts: Alloy Steel
Stainless Steel
Type DJ Double Element (Plug-in) Couplings
- Variations in DBSE are available to suit customer requirements. Please refer to Bibby Turboflex for extreme variations. Long shafts may be fabricated in steel or composite tube (DJCFT) units may be considered.
- Momentary overloads of 2x stated rating and shock loads of 3.7x stated rating are permitted.
- Maximum speeds shown are for standard design & materials. Higher speeds may be possible. Consult Bibby Turboflex.
- The maximum bores shown are for cylindrical or tapered shafts with international standard rectangular keys. Units can be supplied with other forms of shaft connection. Please consult Bibby Turboflex.
- Unless specified to the contrary, hub bores will be manufactured with H6 tolerance up to 50mm diameter and H7 above 50mm.
- Unit inherent balance is better than Q16. Balance to Q6.3 or Q2.5 may be recommended or is available upon request.
Type DS & D Couplings
- Variations in DBSE are available on D Type to suit customer requirements. Please refer to Bibby Turboflex for extreme variations. Long shafts may be fabricated in steel or composite tube (DJCFT) units may be considered.
- Momentary overloads of 2x stated rating and shock loads of 3.7x stated rating are permitted.
- Maximum speeds shown are for standard design & materials. Higher speeds may be possible. Consult Bibby Turboflex.
- The maximum bores shown are for cylindrical or tapered shafts with international standard rectangular keys. Units can be supplied with other forms of shaft connection. Please consult Bibby Turboflex.
- Unless specified to the contrary, hub bores will be manufactured with H6 tolerance up to 50mm diameter and H7 above 50mm.
- Unit inherent balance is better than Q16. Balance to Q6.3 or Q2.5 may be recommended or is available upon request.
Available Standard Options
Anti-Flail
This refers to a feature introduced to
restrain the coupling spacer in the
event of an element disc failure. In
practice, the overload-washer / bolt
system adopted in Bibby Turboflex
general purpose disc couplings serves
this requirement. However, if required
a secondary anti-flail feature can be
incorporated on the DJ range of units.
Limited End Float (LEF)
Bibby Turboflex disc couplings can be
adapted to offer a limited end float
capability. The standard limitation is
±3mm for a spacer coupling. Other
limits are available on request. Please
note that the non-linear axial stiffness
of disc couplings means that, under
most circumstances, they inherently
limit the float of a motor rotor within
its bearing stops. As such, the addition
of a limiting end float system is
frequently not required. Please consult
Bibby Turboflex for further
information.
