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LEAD - IN - WIRES 


LEAD-IN-WIRES are one the most important component and forms a nucleus in manufacture of Lamps and Picture Tubes since it conducts electricity to the filament and acts as sealing component from glass to metal. It also provides resistance upto specified requirements. Based on individual applications the specifications are selected by the Lamp manufacturers.


The major applications of Lead-in-wires are …

Type Typical  Applications
Single Length  Compact Fluorescent Lamps (CFL),
TL Starters
Two Part  Halogen lamps. Neon Indicators, 
Glow Lamps, TL Starters
Three Part  General Lighting Service Lamps (GLS),
Fluorescent Tube Lamps (FTL)
Compact Fluorescent Lamps (CFL), 
Sodium Vapour & Mercury Vapour
Lamps (HPSV & HPMV)
High Intensity Discharge Lamps (HID)
Picture Tube & Electron Tube 

However, the standard specification of Lead-in-wires widely used by Lamp Industries are as mentioned in Table A . Any other specifications, dimensions or materials combination can also be available on request.

The Lead-in-wires are available in Electric Welding or Gas Welding.

Specifications:
for LAMPS

  INNER LEAD  CENTRE LEAD  OUTER LEAD
Standard Materials  Nickel
Nickel Mn
Nickel Plated Steel (NPS) 
FeNi 48
Nickel Plated Copper (NPC) 
Nickel Plated Copper Tin (NPCuSn) 

Dumet Tungsten 

 Copper
CCS (30% or 40% IACS)
Nickel Copper (Ni67 Cu33)
CuSn (Bronze)
Twisted Wire
Aluchrome 
Monel
Temper / Finish  Hard / Soft  Borated / Oxidised  Hard / Soft
Any other materials combination is available upon request
Standard Diameters (mm) 

Diameter Tolerance 		 0.4 - 2.5 


+ 2% 		 Du 0.3 -0.6
W 0.5-1.2 

+ 1 % 		 0.16 - 0.8


+ 2%
Normal available lengths (mm)  6 - 75  3 - 15  12 - 100 
Length Tolerance  + 0.25  + 0.25  + 0.25
Overall Length (mm)  + 0.50
Packaging  Flat packed Cardboard Boxes or Plastic tubes or as per customers specifications
Quality The following critical parameters are checked & verified by us through in-process and final inspection procedure to ensure the quality within specified limits
  • Weld Strength
  • Weld diameter
  • Concentricity & straightness
  • Dimensions

FOR PICTURE TUBE & ELECTRON GUNS




  INNER LEAD  CENTRE LEAD  OUTER LEAD
Standard Materials available 

Temper / Finish 		 Nickel / Nickel Mn 

Hard / Soft 		 Dumet 

Oxidised / Borated 		 Nickel

Hard / Soft
Any other materials combination will be available upon request
Standard Diameters (mm)  0.5 - 2.0  0.30 - 0.50  0.5 - 2.0
Diameter Tolerance (mm)  + 2 %  + 1%  + 2%
Normal Available Lengths (mm)  4 - 20  2 - 8  5 - 25
Length Tolerance (mm)  + 0.10  + 0.10  + 0.10
Overall Length (mm)  + 0.30
Packaging  Plastic Tubes or as specified by customer
Quality  The following critical parameters are checked & verified by us through in-process and final inspection procedure to ensure the quality within specified limits
  • Weld Strength
  • Weld diameter
  • Concentricity & straightness
  • Dimensions

^TOP
#160-B, 3rd Main, Industrial Town, Rajajinagar, Bangalore - 560 044. Karnataka State, INDIA
Phone : +91 80 23357443, +91 80 23353067, +91 80 23357443. email : ilm@bgl.vsnl.net.in

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