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  • 800 Series Exp Krais
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844-5 Krais Expander 7/8" O.D. 17-18 GA

  • 800 Series Exp Krais
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Part number: 844-5

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The 844-5 Krais Expander 7/8" O.D. is a robust and reliable tool designed for precision tube expanding in heat exchangers, boilers, and condensers. Specifically engineered for 17-18 gauge tubes, this expander ensures a secure and leak-proof fit. Its durable construction and meticulous design provide consistent, high-quality expansions, making it an essential tool for professionals seeking efficiency and longevity in their tube fabrication and maintenance operations.

844-5 Specifications

  • Manufacturer:Krais
  • Tube O.D. (in.):0.875
  • Tube O.D. (mm):22.2
  • Series:800 Series, 800 Series; 5-Roll
  • Tube I.D. (in.):0.759, 0.777
  • Tube I.D. (mm):19.28, 19.74
  • BWG:17, 18
  • Tube Sheet Thickness (in.):1-1/4 to 2-1/4 in.
  • Tube Sheet Thickness (mm):31.7 to 57.1 mm
  • Mandrel:M-17-3/8
  • Mandrel Square (in.):3/8"
  • Mandrel Square (mm):9.5
  • Expansion Range Max (in.):0.829
  • Expansion Range Max (mm):21.06
  • Expansion Range Min (in.):0.74
  • Expansion Range Min (mm):18.8
  • Tube Gauge (in.):0.049, 0.058
  • Tube Gauge (mm):1.24
  • Electric Motor:TES3000 G1000, TESMini2 DUO
  • Pneumatic Motor:K50-1250
  • Roll Set No.:R-11-A-5
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