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NMTG Solution for

Wind Industry-Shrink Disc

Keyless Locking Assembly or Taper Lock Assembly

  • Generally Known as Mechanical Power Transmission Element.
  • It is used as an alternative Power transmission element between shaft and Hub instead of taper key.

Key less transmission elements

NMTG Keyless Transmission Elements works based on wedge friction theory. The clamping system connects two or more parts to the shaft and hub which allow motion to be transmitted and to withstand an axial thrust. Due to Interference between two bonded parts at the shaft and hub, the torque can be transmitted from the shaft to the hub through locking assembly. The locking assembly develops pressure between the shaft and the hub, which transmits the highest torques free from backlash. Thus gears, chain sprockets, pulley, drum, cam discs, the flywheel can be attached preciously. The supplied locking devices are ready for installation.

NMTG Shrink Disc Solution

for Wind Industry Applications

Engineered Solutions for Wind Turbines

NMTG is a leading manufacturer of locking assemblies & Shrink Disc that perform under the most rigorous demands in your wind energy applications. NMTG utilizes the latest manufacturing methodology ensuring high precision products. Our department monitors accurate testing during production. All products are subject to a strict quality control to guarantee the highest level of quality products.

  • NMTG Shrink Disc type NSD connect the rotor shaft in the main drivetrain with the gearbox hollow shaft.

Engineered Solutions for Wind Turbines Shrink Disc

NMTG Models For Wind Turbines

NSD Series

  • Two Part Shrink Disc Design
  • Centre the hollow shaft or hub to shaft
  • Easy Mounting & Removal

Benefits

  • Resistant against impacts and shocks within the powertrain.
  • Simultaneous transmission of several loads, such as torques and bending moment, axial or transverse forces.
  • Easy fitting and dismantling thanks to a backlash-free joint between the shaft and hub.

 NMTG Shrink Disc Model

Diameter Range

Torque Transmitting Capacity

Remarks

NSD 20

24 mm to 262 mm

150 Nm to 18300 Nm

 10.9 Grade Bolts

NSD 21

140 mm to 800 mm

160 kNm to 4033 kNm

 10.9 Grade Bolts

NSD 22

12 mm to 1200 mm

20 Nm to 16492 kNm

10.9 Grade Bolts

NSD 23

140 mm to 800 mm

26 kNm to 8952 kNm

10.9 Grade Bolts

NSD 28

50 mm to 950 mm

1.5 kNm to 12196 kNm

12.9 Grade Bolts

NSD 28D

30 mm to 620 mm

330 Nm to 4225 kNm

12.9 Grade Bolts

NMTG Other Models For Shrink Disc

N4051, N4071 & N4091

  • Low, Medium & High Torque transmission capacity
  • Three Part Design
  • Self-releasing
  • Easy mounting & removal
  • External locking devices for hollow shaft (Hub) – shaft connection.
  • Also available in a split version

 NMTG Shrink Disc Model

Diameter Range

Torque Transmitting Capacity

N4051

125 mm to 500 mm

10 kNm to 1066 kNm

N4071

30 mm to 500 mm

300 Nm to 1455 kNm

N4091

50 mm to 500 mm

1800 Nm to 1940 kNm

NMTG Tensioner Nuts & Bolt Solution

for Wind Industry Applications

Engineered Solutions for Wind Turbines

NMTG offers a variety of Tensioner Nuts & Bolts products for tightening multiple bolts in Wind energy Application.

Tensioner Nuts & Bolt is designed for direct replacement of Conventional Hex Nut & Bolt. NMTG Tensioner Nuts & Bolt is the simplest, inventive & cost-effective solution in bolted joints. This joint can be tightened without requiring heavy tooling. Also, if the application is critical or special then also NMTG can supply a customized model as per application requirement.

NMTG Tensioner Nuts & Bolts in Wind Turbines

  • NMTG Tensioner can be used to tighten the bolts on the bolts on the shaft bearing support.
  • NMTG Tensioner nuts will secure wind tower connections.

NMTG offers a variety of Tensioner Nuts & Bolts products for tightening multiple bolts in Wind energy Application. Tensioner Nuts & Bolt is designed for direct replacement of Conventional Hex Nut & Bolt. NMTG Tensioner Nuts & Bolt is the simplest, inventive & cost-effective solution in bolted joints. This joint can be tightened without requiring heavy tooling. Also, if the application is critical or special then also NMTG can supply a customized model as per application requirement.

Tensioner Nuts & Bolt

  • Replacement of Simple Hex Nut
  • Used where High Requirement of Preload & Vibration
  • Also used to eliminate jamming issue, because in Installation & Removal is very easy in Tensioner Nuts & Bolt.

Introduction: Tensioner Nuts & Bolt is designed for direct replacement of Conventional Nut & Bolt. Normally in Industries, different bolted joints / connections are to be used. In medium & heavy Industries, different bolted joints are used which requires high Clamping Force & size is also bigger. So, these require more effort in Tightening & Untightening.

Working Principle: In Tensioner Nuts & Bolt, total clamping force is divided into no. of clamping screw. By tightening the clamping screws, a strong clamp force is generated. This clamping force is directed against a thrust washer and bolt having small friction diameter so it will help to create high clamping force with relatively little torque input. Because of reducing friction on main thread and on bearing contact area, almost all theoretical preload can be achieved without fretting corrosion.

About – TNS Model

  • Operating temperature range : -40 C to 250 C
  • Used as Replacement of simple convectional Hex Nut
  • Suitable for all general mechanical application
  • TNS can be used on Medium Strength Bolts or Studs & will be fitted in same area as Hex Nut. So, no more space required.
  • Max. Preload Capacity up to 8410 kN
  • Range: M16 to M160

Assembly Parts –

  1. Clamping screws
  2. Nut Body
  3. Thrust Washer