1. Gripping Sheave With Gear For Rope Way

• This rope-way gear is 3000 mm dia and weighs 7.5 MT.

• Gear Teeth were damaged and ropeway was shut down .

• Spare was not available and delivery period for new supply was 18 months.

• Special fixture and tooling was used to do this job. Tooth profile was matched with the pinion for faultless operation.

• The gear gave a life of more than 10 years.

• The blade holding base area was machined to match with the hub

2. Fitting Of Gland Sealing Strips To Turbine Casing 62.5 Mw

• HP and IP Sealing Strips were badly worn-out.

• OEM was not ready to do the job within O/H period.

• Even BHEL advised to send Casing to their works.

• NuMAC developed new strips and S. P. M. for removal of worn strips and fitting and machining of new strips.

3. Sealing [Wiper] Ring For Turbine IP And LP Turbine Bearing Wiper Rings For 210 MW [LMZ] Turbines.

• NuMAC has developed the seals and is doing this job regularly during annual O/H.

4. Thrust Collar Modification.

• Modification of Thrust Collar [Stub Shaft] of Turbine Rotor 62.5 MW.

• Total work, including balancing, was done by NuMAC in a short time.

• Usually Thrust Collars are integral with Turbine Shaft. But, here, the Collar Stub was bolted to Main Shaft and the second Collar was screwed to this Stub.

• To modify, both Collars were made on the Stub Shaft and this was bolted to main Shaft.

• Screwed part was eliminated.

• Modification of Thrust Collar [Stub Shaft] of Turbine Rotor 62.5 MW.