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Gear Couplings

BOSON MAKE BOSOFLEX GEAR COUPLINGS

The gear couplings are flexible in nature and accommodate the misalignment of connecting shafts, while compensating both on in built misalignment and installation misalignment for driven and driving equipments. These gear couplings are flexible, because teeth on hubs and teeth inside cover are suspended in nature so that they can compensate the misalignment. In order to avoid vibration, produced by rotating Mass, the gear teeth need to have a proper radial clearance at time of lower speed transmission of torque. As speed of torque gets higher, this Gear Teeth center on their working flank, which provides distribution of load on all teeth that are equal.

Full Gear coupling

full-gear-coupling-resizeFull Gear coupling is designated as both hubs and sleeves are having outer and inner teeth respectively. Gear coupling Teeth are floating because teeth on outer surface of hub have spherical shape and teeth inside cover have cylindrical shape, have appropriate tangible clearance. The olive shaped tangible teeth, outer spherical gear teeth allow the teeth to float and slide about central axis within range, and this movement of teeth provides flexibility to Gear Couplings. By proper lubrication, conventional stress development is avoided.

Boson always put forward for dynamic balancing as per class and rotating mass and specifications of AGMA 9000 – C90 in case of HIGH RPM as main equipment has the chance for mass imbalance to support sensitive. A Half Rigid Gear Coupling can hold Axial and Angular Misalignment. In case of Full Gear Coupling, it can accommodate Parallel Angular and Axial Misalignment also. It is also to be remembered combined, axial and parallel misalignment can vary for maximum speed, torque can be transmitted, and models of couplings can be selected based on these factors, in order to avoid early and excessive wear. Proper lubrication and maintenance is required time to time.

Half Gear Coupling

half-gear-coupling-resizeHalf Gear Coupling comprises one flexible geared half and one rigid half. It does not accommodate parallel displacement of shafts but does accommodate angular misalignment. This type of couplings are primarily used for “floating shaft” applications.

Mill Motor Hubs

mill-motor-type-gear-coupling-resizeUsed frequently in many mill applications, taper bored mill motor hubs allow for rapid mounting and removal without damaging the shaft or bore. Hubs are available to suit standard AISE mill motor frames or can be produced to suit non standard tapers.

Spacer Type Gear Couplings

spacer-type-gear-coupling-resizeSpacer type gear couplings connect shafts with large distances between shaft ends, with all the high torque performance benefits of a standard gear coupling.

The Brake Drum Type Gear Coupling

gear-coupling-resize The brake drum type gear coupling is used to connect the motor and gearbox shaft or gearbox and machine shaft.The brake is fitted on the brake drum.Thus it serves dual purpose of being a coupling and brake drum.Brake drum type coupling is mainly used to stop the service equipment without switch off the motor.Basically a mechanical force is applied from outside to stop the equipment.

Normally In this type has three parts : the brake drum,Hub and Sleeve.As a special case it is available in 5 parts also.In that case there will be 2 hubs,2 sleeves and 1 brake drum. This is Robust in design.

Floating Shafts

type-gear-coupling-resize Floating shafts can be used with conventional flexible gear Couplings where the distance between driving and driven shaft is more than 15 Ft.

Why Us ?

Boson Gear Couplings are manufactured with Forged Steel and Heat Treated and Machined. The use of steel for gear couples are Nitrolloy N/ 135, AISI 4140, AISI 1045 and these are tempered and hardened before going to machinery. In some of GEAR Couplings, machine gear teeth are surface hardened by thermo chemical treatment or thermal in order to increase load capacity. For Gear Coupling nitroxidation, gas nitridiing and tempering in induction oven is done. At the last stage anti oxidant and anti corrosive treatment is also done.

Normally in our Standard Gear Coupling made from AISI 1045, unless otherwise specified, nitroxidation treatment for limiting surface corrosion. Besides this treatment can improve wear resistance, surface hardness and increase service under life under rotational speed and high misalignment. The Gear Coupling is selected and is based on operating data like horse power , Shaft Dia for both Driven and Driving Side, Rotation Per Minute and Type of Equipment.

We recommend to perform a dynamic balancing of the rotating masses- class and requirements to be specified (See AGMA 9000 C90)- in case of the high rotation speed or when the equipments having supports sensitive to the mass imbalance are involved. A single engagement of the gear teeth (half-coupling) can compensate both angular and axial misalignments, two engagements of the gear teeth (complete coupling) are required to compensate also the parallel misalignments.

Please remember that angular, parallel, combined and axial alignments, maximum speed rotation and transmitted torques must be in accordance with the requirements of every kind of coupling, to avoid excessive or early wear. Maintenance and lubrication have to be careful and precise.

The Gear couplings are properly packaged as per their dimensions, weight, required type of transport and storage. For prevention of oxidation, the interface surfaces or the surface which have been submitted to assembly the operations are protected by a wax film of TECTYL 506 EH. The raw or semifinished wide surfaces of spacer tubes are painted, after sandblasting, by one primer acrylic coat and two final epozy coats, this kind of painting can resist temperatures up to 100-120° C

Infact, we allow several kind of coating as per customer requirements. The torque a gear coupling to the total misalignment between the shafts when connected. The gear couplings must be selected as per the operational data (speed and load), the nominal and max load capacities, the application, the static, and dynamic misalignmenets and the max admitted bore.

  • Torsionally Flexible
  • Suitable for High Torque Transmission.
  • Excellent for shock load
  • ExtraLong Life
  • Durable

GEAR COUPLING image

Coupling
Size
BFG
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
LOAD CAPACITY
Torque
in kgf—m
H.P. Per
100rpm
107 15
250 35
451 63
859 120
1303 182
2005 280
3473 485
4512 630
5622 785
8236 1150
11000 1536
14700 2053
20000 2793
28600 3994
34750 4852
60000 8378
85350 11917
113000 15778
149000 20805
Max.
R.P.M.
6500
5200
4000
3400
2900
2600
2200
2000
1800
1500
1250
1120
1000
900
800
710
630
560
500
BORE
Max. Pilot
50 15
60 20
75 30
90 35
110 40
125 45
140 50
160 60
180 70
200 100
260 160
300 180
330 200
370 220
410 250
455 300
520 375
610 450
710 520
Approx Weight (Kg.)
10
15
26
40
60
85
120
180
210
290
550
710
980
1320
1700
2550
3620
4860
6380
App. GD2
0.14
0.20
0.45
0.95
2.00
3.00
5.30
8.50
15.00
30.00
58.00
88.00
138.00
291.00
353.00
680.00
1235.00
1965.00
3012.00
DIMENSION IN MM.
D E F G M
170 110 65 56 50 15 117 66
185 125 85 66 63 15 145 85
220 150 105 87 79 20 179 110
250 175 130 107 97 20 215 130
290 200 155 111 105 25 232 145
320 230 175 126 118 25 262 160
350 260 205 142 135 25 294 175
380 290 230 155 146 25 320 190
430 330 250 165 157 25 340 205
490 390 310 182 172 25 340 205
545 445 350 200 193 30 410 240
590 490 400 240 232 30 490 280
680 555 440 260 242 35 535 310
730 610 500 280 267 35 575 330
780 660 540 320 306 35 655 370
900 755 625 350 335 45 720 425
1000 855 720 400 386 45 820 460
1100 950 810 450 430 55 920 510
1250 1050 910 485 466 55 1000 560

Client Testimonials

We have been using Boson made Gear Couplings for past 3 years and found satisfactory results.

Hindalco

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The Rubber Bellows made by Boson are excellent product and giving us great service for last 2 years.

Jindal

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The Ball Valves that manufactured by Boson have provided excellent service to us for last 1.5 years.

Hira Group

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The Thruster Brakes designed by Boson that used by us have provided certain satisfying results for last 3 years.

Jai Balaji Group

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We are using the Boson made Pulley for past 1 year and it is providing satisfying service.

Balasore Alloys Limited

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