KS Series

KRAIS Tube Expanders

Key Features

Three Expansion Rolls, three flare rolls, self feeding boiler expanders. This expanders simultaneously expand and flare the tube. An excellent expander for re-rolling leaky tubes and for new constructions of Water Tube Boilers, Fire Tube Boilers, Economizers, Air Heaters. Expanders with 6 expansion rolls and 3 flare rolls are available on request. Our K70’s right-angle rolling motors are recommended to be used with this expanders. K70 Right Angle Rolling Motor

Feature

Recommended roll length for varies tube sheet thickness:

Tube Sheet Thickness Roll Length
1/2” - 3/4” (12mm - 19mm) 40
7/8” - 1-1/4” (22mm - 32mm) 50
1-3/8” - 1-3/4” (35mm - 45mm) 60
1-7/8” - 2-1/4” (48mm - 58mm) 80
2-3/8” - 2-3/4” (60mm - 70mm) 90

If you order expander KS-54 with rolls of 50 mm you should specify KS-5450, with 60 mm KS-5460… Short mandrel set with shorter length on request.

KRAIS Tube Expanders

For this expanders there are available special bottle type rolls which reduce the effective roll length. Max. for 10 mm from the front of the roll.

Parameters

TOOL NO. EXP. RANGE STD. ROLL LENGTH OAL EXPANDER SIZE OTHER ROLL LENGTH ROLLS EXPANSION NO. MANDREL NO. MANDREL O.A.L SHORT MANDRELL SET (3 PCS.) SMS O.A.L MANDREL SQUARE
[mm] [inch] [mm] [inch] [mm] [inch] [mm] [inch] [mm] [inch] [mm] [inch]
min max min max
KS-19 19 22 0,75 0,87 42 1,65 1”;9-11GA 30,50 1,1 8; 1,97; RR12RK5 TK19 195.00 7,68 - - - 12,7 1/2
KS-20 20 23 0,79 0,91 42 1,65 1”;13-14GA 30,50 1,18; 1,97; RR12RK5 TK20 195.00 7,68 - - - 12,7 1/2
KS-22 22 25 0,87 0,98 42 1,65 1-1/4”;7 GA 30,50 1,18; 1,97; RR12RK5 TK22 195,00 7,68 - - - 12,7 1/2
KS-23 23 26 0,91 1,02 42 1,65 1-1/4”;9 GA 30,50 1,1 8; 1,97; RR13RK6 TK23 195,00 7,68 - - - 12,7 1/2
KS-24 24 27 0,94 1,06 42 1,65 1-1/4”;10 GA 30,50 1,1 8; 1,97; RR13RK6 TK24 195,00 7,68 - - - 12,7 1/2
KS-25 25 28 0,98 1,10 42 1,65 1-1/4”;11-13GA 30,50 1,18; 1,97; RR13RK5 TK25 195,00 7,68 - - - 12,7 1/2
KS-27 27 30 1,06 1,18 42 1,65 1-1/4”;14-15GA 30,50 1,1 8; 1,97; RR15RK7 TK27 200,00 7,87 - - - 12,7 1/2
KS-28 28 32 1,10 1,26 42 1,65 1-1/4”16 GA 30,50,60,70 1,18; 1,97;2,36; 2,76; RR16RK8 TK28 260,00 10,24 TKK28 175,00 6,89 19,0 3/4
KS-29 29 33 1,14 1,30 42 1,65 1-1/2”7-1 OGA 30,50,60,70 1,18; 1,97;2,36; 2,76; RR16RK8 TK29 260,00 10,24 TKK29 175,00 6,89 19,0 3/4
KS-30 30 34 1,18 1,34 42 1,65 1-1/2”10-12 GA 30,50,60,70 1,18; 1,97;2,36; 2,76; RR16RK8 TK30 260,00 10,24 TKK30 175,00 6,89 19,0 3/4
KS-32 32 36 1,26 1,42 42 1,65 1-1/2”12-14GA 30,50,60,70 1,18; 1,97;2,36; 2,76; RR17RK9 TK32 260,00 10,24 TKK32 175,00 6,89 19,0 3/4
KS-33 33 38 1,99 1,49 42 1,65 1-1/2”13-20GA 30,50,60,70 1,18; 1,97;2,36; 2,76; RP33RR33 TK33 290,00 11,41 TKK33 181,00 7,12 19,0 3/4
KS-35 35 41 1,38 1,61 42 1,65 1-3/4”8-9 GA 50,60,70,80 1,18; 1,97;2,36; 2,76; RR21RK35 TK37 310,00 12,20 TKK37 188,00 7,40 19,0 3/4
KS-37 37 43 1,46 1,69 42 1,65 1-3/4”10-12 GA 50,60,70,80 1,18; 1,97;2,36; 2,76; RR22RK10 TK37 310,00 12,20 TKK37 188,00 7,40 19,0 3/4
KS-39 39 45 1,53 1,77 42 1,65 1-3/4”12-18 GA 50,60,70,80 1,97; 2,36; 2,76; 3,16 RR40RK40 TK37 310,00 12,20 TKK37 188,00 7,40 19,0 3/4
KS-40 40 46 1,57 1,81 50 1,97 2”7-9GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,1 5; 3,54; 3,94; RR40RK40 TK42 310,00 12,20 TKK42 205,00 8,07 19,0 3/4
KS-42 42 48 1,65 1,89 50 1,97 2”10-13 GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,1 5; 3,54; 3,94; RR23RK11 TK42 310,00 12,20 TKK42 205,00 8,07 19,0 3/4
KS-44 44 50 1,73 1,97 50 1,97 2”12-14GA 40,60,70,80,90,100 1.57;2,36; 2,76; 3,15; 3,54; 3,94; RR23RK11 TK44 310,00 12,20 TKK44 205,00 8,07 19,0 3/4
KS-47 47 54 1,85 2,13 50 1,97 2”12-14GA 40,60,70,80,90,100 1.57;2,36; 2,76; 3,15; 3,54; 3,94; RR24RK12 TK47 338,00 13,31 TKK47 218,00 8,58 19,0 3/4
KS-49 49 56 1,93 2,20 50 1,97 2-1/4”10-1 3 GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,1 5; 3,54; 3,94; RR24RK12 TK49 338,00 13,31 TKK49 218,00 8,58 19,0 3/4
KS-52 52 59 2,05 2,32 50 1,97 2-1/4”14-1 6 GA 40,60,70,80,90,100 1.57;2,36; 2,76; 3,15; 3,54; 3,94; RR25RK13 TK49 338,00 13,31 TKK49 218,00 8,58 19,0 3/4
KS-54 54 62 2,13 2,44 50 1,97 2-1/2”8-13GA 40,60,70,80,90,100 1.57;2,36; 2,76; 3,15; 3,54; 3,94; RR26RK14 TK54 375,00 14,76 TKK54 230,00 9,06 19,0 3/4
KS-57 57 66 2,24 2,60 50 1,97 2-1/2”12-1 6 GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,1 5; 3,54; 3,94; RR27RK15 TK57 395,00 15,55 TKK57 235,00 9,25 19,0 3/4
KS-60 60 69 2,36 2,72 50 1,97 2-3/4”7-1 1GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,1 5; 3,54; 3,94; RR28RK16 TK57 395,00 15,55 TKK57 235,00 9,25 19,0 3/4
KS-65 65 74 2,56 2,91 50 1,97 3”7-8GA 40,60,70,80,90,100 1.57;2,36; 2,76; 3,15; 3,54; 3,94; RR29RK17 TK65 395,00 15,55 TKK65 235,00 9,25 19,0 3/4
KS-68 68 78 2,68 3,07 50 1,97 3-10-14GA 40,60,70,80,90,100 1.57;2,36; 2,76; 3,15; 3,54; 3,94; RR30RK18 TK72 425,00 16,73 TKK72 255,00 10,04 25,4 1
KS-72 72 82 2,83 3,23 50 1,97 3-1/4”7-1 1GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,1 5; 3,54; 3,94; RR31RK19 TK72 425,00 16,73 TKK72 255,00 10,04 25,4 1
KS-77 77 87 3,03 3,43 50 1,97 3-1/4”15-16 GA 40,60,70,80,90,100 1.57;2,36; 2,76; 3,15; 3,54; 3,94; RR32RK20 TK77 425,00 16,73 TKK77 255,00 10,04 25,4 1
KS-82 82 92 3,23 3,62 50 1,97 3-1/2”10-13 GA 40,60,70,80,90,100 1.57;2,36; 2,76; 3,15; 3,54; 3,94; RR33RK21 TK82 425,00 16,73 TKK82 255,00 10,04 25,4 1
KS-86 86 96 3,39 3,78 50 1,97 3-3/4”8-1 2 GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,1 5; 3,54; 3,94; RR34RK22 TK86 425,00 16,73 TKK86 255,00 10,04 25,4 1
KS-90 90 102 3,54 4,02 50 1,97 4”9-12GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,1 5; 3,54; 3,94; RR34RK22 TK90 485,00 19,09 TKK90 275,00 10,83 25,4 1
KS-96 96 108 3,78 4,25 50 1,97 4”16GA 40,60,70,80,90,100 1.57;2,36; 2,76; 3,15; 3,54; 3,94; RR35RK23 TK96 485,00 19,09 TKK96 275,00 10,83 25,4 1