Hydraulic Thruster Brake: HTB 100 to HTB 400 Drum Brakes
The SMI hydraulic thruster brake is a spring-applied drum brake: the spring applies the shoes to the drum through a lever and rod mechanism, and the thruster moves them clear. Super Mech Industries makes seven models in Ahmedabad, HTB 100 to HTB 400, for 100–400 mm drums, with braking torque of 6–90 kgm (about 59–883 Nm).
Our Hydraulic Thruster Brakes provide reliable braking force for a wide range of industrial applications. Engineered with precision components, these brakes handle emergency stops while maintaining excellent torque control. The robust design ensures long service life even in demanding environments, making them an economical choice for critical industrial use.
Key Features
- High braking torque capacity
- Spring applied & hydraulically released
- Maintenance-friendly design
- Ideal for emergency stops
Specifications
- Braking Torque: 6-90 kgm (about 59-883 Nm), HTB 100 to HTB 400
- Drum Diameter: 100-400mm
- Thruster Capacity: 18 kg or 34 kg
- Thruster Stroke: 50mm
- Shoe Width: 60-150mm
Applications
- Mining equipment
- Steel manufacturing
- Cranes and hoists
- Wind turbines
- Heavy industrial machinery
Hydraulic thruster brake sizes: HTB 100 to HTB 400
Every HTB model on the SMI spec sheet, with drum diameter, braking torque, thruster capacity and stroke, shoe width and mounting dimensions.
Hydraulic thruster brakes HTB — braking torque and thruster
Models HTB 100 to HTB 400 (drum diameter in mm). Braking torque in kgm as printed, and in Nm converted; thruster capacity in kg; thruster stroke and shoe width in mm.
| Model | Drum dia (mm) | Braking torque (kgm) | Braking torque (converted) (Nm) | Thruster capacity (kg) | Thruster stroke (mm) | Shoe width (mm) |
|---|---|---|---|---|---|---|
| HTB 100 | 100 | 6 | 59 | 18 | 50 | 60 |
| HTB 150 | 150 | 9 | 88 | 18 | 50 | 70 |
| HTB 200 | 200 | 20/34 | 196/333 | 18/34 | 50 | 85 |
| HTB 250 | 250 | 35/42 | 343/412 | 18/34 | 50 | 105 |
| HTB 300 | 300 | 42/62 | 412/608 | 18/34 | 50 | 125 |
| HTB 375 | 375 | 62 | 608 | 34 | 50 | 150 |
| HTB 400 | 400 | 90 | 883 | 34 | 50 | 150 |
- Braking torque is printed on the spec sheet in kgm (kgf·m). The Nm column is converted at 1 kgf·m = 9.80665 N·m and rounded to the nearest Nm.
- Where the sheet prints two values for one model (thruster 18/34 kg, torque 20/34 kgm), both are shown as printed; confirm the thruster for your duty with SMI.
Source: SMI spec sheet hydraulic-thruster-brake.pdf.
Hydraulic thruster brakes HTB — dimensions
Models HTB 100 to HTB 400. All dimensions in mm; letters A to M refer to the drawing on the spec sheet.
| Model | Drum dia (mm) | A (mm) | B (mm) | C (mm) | D (mm) | E (mm) | F (mm) | G (mm) | H (mm) | I (mm) | J (mm) | K (mm) | L (mm) | M (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HTB 100 | 100 | 420 | 265 | 70 | 25 | 129 | 308 | 130 | 112 | 12 | 95 | 150 | 345 | 362 |
| HTB 150 | 150 | 470 | 265 | 90 | 25 | 129 | 365 | 130 | 112 | 12 | 95 | 175 | 375 | 362 |
| HTB 200 | 200 | 610 | 540 | 115 | 35 | 200 | 470 | 150 | 130 | 12 | 95 | 194 | 405 | 362 |
| HTB 250 | 250 | 700 | 630 | 150 | 35 | 234 | 525 | 185 | 135 | 12 | 95 | 244 | 465 | 362 |
| HTB 300 | 300 | 775 | 710 | 185 | 35 | 275 | 560 | 205 | 140 | 22 | 95 | 242 | 520 | 362 |
| HTB 375 | 375 | 890 | 790 | 225 | 60 | 264 | 625 | 176 | 126 | 20 | 95 | 308 | 608 | 362 |
| HTB 400 | 400 | 890 | 790 | 225 | 60 | 264 | 625 | 176 | 126 | 20 | 95 | 320 | 620 | 362 |
- Dimensions are as printed on the spec sheet (HTB 375 and HTB 400 share dimensions A to J). Ask for the dimension drawing before finalising a mounting.
- The sheet's dimension table ends with a column headed “TORQ Kgs.” (5, 9, 20, 25, 40, 48, 54). Those values do not match the braking-torque table and the heading gives a mass unit, so the column is left out; ask SMI for brake weights.
Source: SMI spec sheet hydraulic-thruster-brake.pdf.
Frequently Asked Questions
How is a hydraulic thruster brake applied and released?
A spring applies the braking force to the shoes through a lever and rod mechanism, so the brake holds whenever the thruster is not lifting it. To release, the thruster moves the shoes clear of the drum through the lever and arm linkage, overcoming the spring force.
Is the SMI thruster brake a disc brake or a drum brake?
A drum brake. Every HTB model on the spec sheet applies shoes to a brake drum, from a 100 mm drum on HTB 100 to a 400 mm drum on HTB 400. For a disc brake, SMI makes the electromagnetic disc brake, which is spring-applied and electrically released.
What braking torque does each HTB model give?
The spec sheet gives 6 kgm for HTB 100, 9 kgm for HTB 150, 20/34 kgm for HTB 200, 35/42 kgm for HTB 250, 42/62 kgm for HTB 300, 62 kgm for HTB 375 and 90 kgm for HTB 400. One kgm is 9.80665 Nm, so the range is about 59 to 883 Nm. Where two torques are printed, the sheet also lists two thruster capacities (18/34 kg) for that model.
Where are hydraulic thruster brakes used?
SMI's spec sheet lists electrically driven hoists, cranes, elevators, ropeways, flap valves, guillotine machines, conveyors and steel mills. The product record also lists mining equipment and heavy industrial machinery.
Do you make a brake drum coupling to match the brake?
Yes. SMI's brake drum geared coupling (SBDC) range includes 150, 200, 250, 300, 375 and 400 mm drums, the same drum diameters as HTB 150 to HTB 400. The SBDC sheet lists no 100 mm drum, so ask SMI about a coupling for HTB 100.
What should I send for a thruster brake quote?
The braking torque you need (or the motor kW and rpm), the brake drum diameter, the duty (holding, service or emergency stops), the supply voltage for the thruster, whether you also need the brake drum coupling, and the quantity.
What sizes of Hydraulic Thruster Brake does SMI manufacture?
SMI lists 7 sizes from HTB 100 to HTB 400 rated from 59 Nm to 883 Nm. The full size chart with dimensions is on this page and on the spec sheet.
Exported from Ahmedabad to 29 countries
Super Mech Industries exports from Ahmedabad, India to 29 countries, shipping from Mundra Port (Gujarat) or JNPT (Nhava Sheva, Mumbai).
Super Mech Industries — Odhav, Ahmedabad, Gujarat 382415, India. Phone: +91 63510 70577. Email: smigvs@gmail.com. ISO 9001:2015 certified.