Brake Drum Gear Coupling Manufacturer in India
Super Mech Industries manufactures brake drum gear couplings — CI brake drum + gear coupling in one unit — with drum diameters from 100 mm to 600 mm and torque ratings from 50 to 3,200 Kg.M.
Brake Drum Gear Coupling — Key Facts
Drum materialGrade CI (grey cast iron) — standard; SG iron on requestDrum diameter range100 mm to 600 mm (custom available)Torque range50 Kg.M to 3,200 Kg.MHub boreCustom machined to shaft diameterBrake compatibilityShoe brake or caliper brakeCoupling typeGear coupling (crowned hub + sleeve)DispatchStandard sizes: 5–7 days; custom: 10–14 daysWhat Is a Brake Drum Gear Coupling?
A brake drum gear coupling integrates two functions into one assembly: the power transmission function of a gear coupling and the braking function of a brake drum. The outer sleeve — which in a standard gear coupling carries only the internal teeth for the gear mesh — is extended and machined on its outer diameter to act as a brake drum. A shoe brake or caliper brake acts on this drum OD when braking torque is required.
Inside the sleeve, the standard crowned gear mesh transmits drive torque between the motor shaft hub and the driven machine shaft hub — exactly as in a conventional full or half gear coupling. The braking and power transmission functions share the same rotating component, eliminating the weight, cost, and shaft space that a separate brake disc or drum would require.
The CI sleeve provides good thermal mass for dissipating brake heat during multiple braking cycles. The drum OD is machined to a tight tolerance for even brake lining contact and predictable braking torque.
One Unit — Two Functions
Replaces a separate gear coupling + brake drum assembly. Reduces shaft length, total weight, and assembly complexity in crane and hoist drive trains.
Easy Brake Lining Access
Brake shoes or caliper acts on the OD of the sleeve from outside. No disassembly of the gear coupling is needed to replace brake linings — the gear mesh remains intact during brake maintenance.
Standard CI Material for Cost Control
Grey cast iron sleeve is the standard specification — the same material used in automotive and industrial brake drums. Cost-effective and readily machineable for custom drum dimensions.
Brake Drum Gear Coupling — Standard Size Range
Standard range by drum diameter. Hub bore is machined to your shaft dimensions. Custom drum OD and face width available — contact SMI with your brake system specifications.
| Size | Drum Dia (OD) | Coupling Torque (Kg.M) | Coupling Torque (Nm) | Max Hub Bore (mm) | Max Speed (rpm) |
|---|---|---|---|---|---|
| BDGC 100 | 100 mm | 50 | 490 | 35 mm | 1,500 |
| BDGC 150 | 150 mm | 100 | 981 | 50 mm | 1,500 |
| BDGC 200 | 200 mm | 200 | 1,962 | 65 mm | 1,200 |
| BDGC 250 | 250 mm | 350 | 3,432 | 80 mm | 1,200 |
| BDGC 300 | 300 mm | 600 | 5,884 | 100 mm | 1,000 |
| BDGC 400 | 400 mm | 1,200 | 11,768 | 130 mm | 750 |
| BDGC 500 | 500 mm | 2,000 | 19,614 | 160 mm | 600 |
| BDGC 600 | 600 mm | 3,200 | 31,382 | 180 mm | 500 |
Coupling torque ratings are for the gear mesh. Brake torque is determined by the brake actuator and lining — contact your brake supplier for brake torque sizing. Call SMI at +91 63510 70577 to match coupling torque class to brake drum diameter.
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Brake Drum Gear Coupling Applications
EOT Cranes (Electric Overhead Travelling)
The most common application. Long travel, cross travel, and hoist motion drives all use brake drum couplings for integrated braking. Drive motor shaft is connected to gearbox via brake drum coupling — motor brake acts on drum to hold load during power loss.
Wire Rope Hoists & Winches
Hoist drum drives where the motor-to-gearbox coupling must also serve as the brake mounting point. The brake drum sleeve provides the braking surface for the electrically released brake that holds the suspended load.
Inclined & Overhead Conveyors
Conveyors carrying material on an incline require hold-back braking to prevent reverse runback during power loss. Brake drum gear coupling on the drive provides this — shoe brake acts on drum OD to hold conveyor stationary.
Steel Plant Transfer Cars & Ladle Cars
Transfer car drives in steel plants need coupling + braking in compact drive trains. Brake drum gear coupling eliminates separate drum assembly on limited-length drive shafts.
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Brake Drum Gear Coupling — FAQ
Brake Drum Gear Coupling — Available Range
Drum diameters 100 mm – 600 mm, manufactured at Odhav, Ahmedabad. Custom drum OD and bore in 10–14 days.
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View detailsFrequently asked questions
What is a brake drum gear coupling?
A brake drum gear coupling is a dual-function mechanical component that combines a gear coupling with an integral brake drum in a single unit. The outer sleeve of the gear coupling is machined to function as a brake drum — a caliper or shoe brake acts on the outer diameter of the sleeve to provide braking torque, while the internal gear teeth on the same sleeve mesh with the crowned gear hub to transmit drive torque. This eliminates the need for a separate brake disc or drum assembly on the drive shaft.
What material is the brake drum sleeve made of?
SMI manufactures brake drum sleeves from grade CI (Grey Cast Iron) as standard — the same material used for industrial brake drums and flywheels. Cast iron has excellent thermal mass for heat dissipation during repeated braking cycles and good machinability for achieving the tight drum OD tolerance required for brake lining contact. For high-speed or high-duty-cycle applications, SG iron or alloy cast iron variants are available on request.
What type of brake is used with a brake drum gear coupling?
Brake drum gear couplings are compatible with both shoe brakes (internally or externally mounted brake shoes with brake lining) and caliper disc-style brakes acting on the drum OD. The choice depends on the braking torque requirement and the existing brake mounting arrangement. SMI supplies the coupling only — the brake actuator is selected and sourced separately to match your existing brake system.
What applications use brake drum gear couplings?
The most common applications are EOT (Electric Overhead Travelling) cranes, wire rope hoists and winches, overhead conveyors with hold-back braking requirements, and inclined belt conveyors where the load must be held in position during power failure or e-stop events. The integrated drum eliminates the separate shaft-mounted brake drum, reducing coupling assembly length and weight.
Can SMI supply custom drum diameters for brake drum gear couplings?
Yes. Drum diameter (OD) and drum face width can be specified at order time to match an existing shoe brake or caliper brake. SMI machines brake drum sleeves on CNC turning centres at our Odhav, Ahmedabad factory. Provide the required drum OD, face width, brake lining contact area, and the gear coupling torque rating when requesting a custom quotation.
More questions about this page
What drum sizes does SMI offer for brake drum gear couplings?
SMI manufactures brake drum gear couplings with cast-iron drum diameters from 100 mm to 600 mm, sized to suit standard thruster and electromagnetic brakes.
Where are brake drum gear couplings used?
They are used on EOT cranes, hoists, winches and material-handling drives that need both flexible torque transmission and a braking surface in a single assembly.
Which brakes fit SMI brake drum couplings?
The cast-iron drum suits standard electro-hydraulic thruster brakes and electromagnetic shoe brakes matched to the drum diameter (100–600 mm).
Super Mech Industries — Odhav, Ahmedabad, Gujarat 382415, India. Phone: +91 63510 70577. Email: smigvs@gmail.com. ISO 9001:2015 certified.