Tool for Serrating Tube Sheet

KRAIS Tube Expanders

Key Features

Please find below the presentation of our most up-to-date, portable, self-centering tool for grooving tube sheet, model JGS Grooving Tool. Some very essential innovations have been implemented to the design of our JGS Grooving Tool, which has a huge impact on the comfort of operating the tool. After the study of the wear degree of the tool mandrel we decided to use rollers the task of which it is to guide and next, to protect against wear the tool mandrel. The new, single-piece mandrel with built-in rollers in the part that operates directly in the hole, allows to obtain a perfect surface, free from burrs and flashes. The latter were formed with the previous designs during the friction of the mandrel against the walls of the hole – now, it is eliminated through the use of rollers – the mandrel rolls over the walls of the hole. Owing to the lack of friction the life of the tool has grown very significantly.

The next upgrading feature introduced by us was a channel conducted inside the mandrel, this channel serving the purpose of feeding the cooling medium directly through the tool cutter, this having an enormous impact on the life of the cutter and helping in rinsing out chips during the work. Grooving tools with channels make an option.

Grooving tools can be used both on portable and stationary multiradial drills. They also find their application on NC machine tools. We manufacture JGS grooving tools within a broad range of sizing: 3/8” (9.52 mm) to 4” (101.6 mm), in both imperial and metric versions. As a standard, the tools have an adjustment system for channel cutting reach, 22.2 mm to 54.0 mm (as counted from the bottom face to the internal edge of the channel being cut). Tools of a higher cutting reach are manufactured to special order. A cutter 3 x 6 x 3 mm belongs to the standard outfit of the grooving tool – our offer comprises the whole range of cutters manufactured both in imperial and metric versions.

KRAIS Tube Expanders

Features

KRAIS Tube Expanders

The rollers over the circumference of the mandrel* allow to achieve a perfect surface of the hole (*PAT. PENDING)

KRAIS Tube Expanders

The new mandrel with a central hole to feed the cooling agent

KRAIS Tube Expanders

The cooling of the tool bit during its operation has a strong impact on its life

Parts

KRAIS Tube Expanders

Imperial Measurements

# DESCRIPTION 3/8” O.D. 1/2” O.D 5/8” O.D 3/4” O.D. 7/8” O.D. 1” O.D. 1-1/8” O.D. 1-1/4” O.D. 1-1/2” O.D. 1-3/4” O.D. 2” O.D. 2-1/4” O.D. 2-1/2” O.D
0 TOOL COMPLETE JGS-375 JGS-500 JGS-625 JGS-750 JGS-875 JGS-1000 JGS-1125 JGS-1250 JGS-1500 JGS-1750 JGS-2000 JGS-2250 JGS-2500
1 TOOL BIT ST-3753-S ST-5003-S ST-6203-S ST-7503-S ST-7503-S ST-7503-S ST-7503-S ST-7503-S ST-7503-S ST-7503-S ST-7503-S ST-7503-S ST-7503-S
2 TOOL BIT SPRING ST-3711 ST-5011 ST-6211 ST-7511 ST-7511 ST-7511 ST-7511 ST-7511 ST-7511 ST-7511 ST-7511 ST-7511 ST-7511
3 THRUST COLLAR TB-3703 TB-5003 TB-6203 TB-7503 TB-8703 TB-10003 TB-285 TB-315 TB-381 TB-444 TB-508 TB-571 TB-635
4 LOCK RING W-24 W-28 W-30 W-35 W-42 W-47 W-47 W-52 W-60 W-65 W-78 W-85 W-90
5 BEARING 1100 1102 1103 1104 1105 1106 1106 1107 1108 1109 1111 1112 1113
6 LOCK RING W-24 W-28 W-30 W-35 W-42 W-47 W-47 W-52 W-60 W-65 W-78 W-85 W-90
7 BODY JGS-3703-B JGS-5003-B JGS-6203-B JGS-7503-B JGS-8703-B JGS-10003-B JGS-285-B JGS-315-B JGS-381-B JGS-444-B JGS-508-B JGS-571-B JGS-635-B
8 S-C-SCREW 5-40X1/4 5-40X1/4 5-40X1/4 6-32X1/4 6-32X1/4 6-32X1/4 6-32X1/4 6-32X1/4 6-32X1/4 6-32X1/4 6-32X1/4 6-32X1/4 6-32X1/4
9 SET SCREW 1 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4
10 SET SCREW 2 10-32X1/4 10-32X1/4 10-32X1/4 10-32X1/4 10-32X1/4 10-32X1/4 10-32X1/4 10-32X1/4 10-32X1/4 10-32X1/4 10-32X1/4 10-32X1/4 10-32X1/4
11 SPACING LOCK SL-3711 SL-5011 SL-6211 SL-7511 SL-8711 SL-10011 SL-285 SL-315 SL-381 SL-444 SL-508 SL-571 SL-635
12 TENSION SPRING S-100 S-127 S-158 S-190 S-222 S-254 S-285 S-315 S-381 S-444 S-508 S-571 S-635
13 MANDREL LOCK ML-3713 ML-5013 ML-6213 ML-7513 ML-8713 ML-10013 ML-28513 ML-31513 ML-38113 ML-44413 ML-50813 ML-57113 ML-63513
14 SET SCREW 3 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4
15 AJUSTING NUT/td> AN-3715 AN-5015 AN-6215 AN-7515 AN-8715 AN-10015 AN-28515 AN-31515 AN-38115 AN-44415 AN-50815 AN-57115 AN-63515
16 MANDREL STD GS-3716 GS-5016 GS-6214 GS-7516 GS-8716 GS-10016 GS-285 GS-315 GS-381 GS-444 GS-508 GS-571 GS-635
MANDREL WR N/A N/A GS-6214-R GS-7516-R GS-8716-R GS-10016-R GS-286-R GS-315-R GS-381-R GS-444-R GS-508-R GS-571-R GS-635-R
MANDREL WR&H N/A N/A GS-6214-RH GS-7516-RH GS-8716-RH GS-10016-RH GS-286-RH GS-315-RH GS-381-RH GS-44R-RH GS-508-RH GS-571-RH GS-635-RH
17 ROLLS*** N/A N/A STR-3-55 STR-3-55 STR-4-55 STR-6-55 STR-6-55 STR-6-55 STR-6-55 STR-6-55 STR-6-55 STR-6-55 STR-6-55
18 ROLL RETAINER N/A N/A RRT-16 RRT-19 RRT-22 RR-25 RRT-28 RRT-32 RRT-38 RRT-44 RRT-51 RRT-57 RRT-63

Metric Measurements

Item Description 10 mm 12 mm 16 mm 20 mm 22 mm 25 mm
0 Tool complete JGS-375-10 JGS-500-1200 JGS-625-1600 JGS-750-2000 JGS-875-2200 JGS-1000-2500
1 Tool bit GS-106 GS-206 GS-306 GS-406 GS-406 GS-406
2 Tool bit spring TS-3711 TS-5011 TS-6211 TS-7511 TS-7511 TS-7511
3 Thrust collar TB-10 TB-12 TB-16 TB-20 TB-22 TB-254
4 Lock ring W-24 W-28 W-30 W-35 W-42 W-47
5 Bearing 1100 1102 1103 1104 1105 1106
6 Lock ring W-24 W-28 W-30 W-35 W-42 W-47
7 Body JGS-3703-B JGS-5003-B JGS-6203-B JGS-7503-B JGS-8703-B JGS-10003-B
8 S-c-screw 5-40X1/4 5-40X1/4 5-40X1/4 6-32X1/4 6-32X1/4 6-32X1/4
9 Set screw 1 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4
10 Set screw 2 10-32X1/4 10-32X1/4 10-32X1/4 10-32X1/4 10-32X1/4 10-32X1/4
11 Spacing lock SL-3711 SL-5011 SL-6211 SL-7511 SL-8711 SL-10011
12 Tension spring S-100 S-127 S-158 S-190 S-222 S-254
13 Mandrel lock ML-3713 ML-5013 ML-6213 ML-7513 ML-8713 ML-10013
14 Set screw 3 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4 1/4-20X1/4
15 Ajusting nut AN-3715 AN-5015 AN-6215 AN-7515 AN-8715 AN-10015
16 Mandrel std GS-3716-10 GS-5016-12 GS-6216-16 GS-7516-20 GS-8716-22 GS-10016-25
Mandrel wr N/A N/A GS-6216-16-R GS-7516-20-R GS-8716-22-R GS-10016-25-R
Mandrel wr&h N/A N/A GS-6216-16-RH GS-7516-20-RH GS-8716-22-RH GS-10016-25-RH
17 Rolls*** N/A N/A STR-3-55 STR-3-55 STR-4-55 STR-6-55
18 Roll retainer N/A N/A RRT-16 RRT-20 RRT-22 RRT-25

*** Rools / Rollen/ Rolki: STD, HSS, CB

Warning – for tube sheet holes bigger then max. 0,25 mm then O.D. of the tube the tailor made mandrel should be considered. Holes bigger then then 0,25 mm may create a damage of the tool mandrel or drilling machine!