MiniMill 101

Recommended for: tube facing, tube bevelling, weld removal

KRAIS Tube Expanders

The MiniMill 101 is a rugged, fast, portable weld end preparation lathe designed for various tubes and pipes, including stainless steel and other high chromium materials. Our standard machine can be used for pipe sizes of 20 – 74 mm i.d. (0.787” – 2.913”) and comes with a 88 mm cutting head.

Standard working range

APPLICATION RANGE STANDARD LOCKING
25 - 89 mm 25 - 77 mm
0,984 – 3,504” 0,984 – 3,031”

Motor parameters

FEED STROKE POWER FREE SPEED TORQUE
20 mm 0,787" 1,3 Hp 120 Rpm 140 Nm 105 Ft.Lbs
Air use: 55 cfm 1,3 m3/ min Body width: 2,32” 59 mm
Body height: 13,1” 335 mm Body weight: 11,4 Lbs 5,2 kg

Standard set up

KRAIS Tube Expanders

88 mm (3,46”)

The popular, medium cutter head, designed to fasten the wide range of cutting inserts.

KRAIS Tube Expanders

SHAFTS 25

Self-align, heavy duty locking system. Shafts and jaws are longer and wider to ensure maximum clamping force.

Locking range in standard set up

SHAFT: SHAFT25

RANGE [MM] RANGE [INCH] JAWS EXT. SPRING
MIN MAX MIN MAX NR QTY.
25 30 0,984 1,181 NS-1 SP-24 1
30 35 1,181 1,378 NS-2 SP-24 1
35 40 1,378 1,575 NS-3 SP-25 2
40 45 1,575 1,772 NS-4 SP-25 2
45 50 1,772 1,969 NS-5 SP-25 2
50 55 1,969 2,165 NS-6 SP-25 2
55 60 2,165 2,362 NS-7 SP-25 2
60 65 2,362 2,559 NS-8 SP-25 2
62 67 2,441 2,638 NS-5 NS-10 SP-25 2
67 72 2,638 2,835 NS-6 NS-10 SP-25 2
72 77 2,835 3,031 NS-7 NS-10 SP-25 2

Optional working range

APPLICATION RANGE STANDARD LOCKING
10 – 107 mm 10 – 102 mm
0,394 – 4,213” 0,394 – 4,016”

Optional specialized cutter heads

KRAIS Tube Expanders

66 mm (2,36”)

The smallest cutter head, designed to faster  the wide range of cutting inserts.

KRAIS Tube Expanders

116 MM (4,56”)

The popular, large cutter head, designed to fasten the wide range of cutting inserts.

KRAIS Tube Expanders

OBMH

Head for bevelling tubes without membranes in the boiler water walls.

Go to datasheet.

KRAIS Tube Expanders

SWROTC

Seal weld removal head over tube circumference prior to re-welding the damaged joint without removing the tube.

​Go to datasheet.

KRAIS Tube Expanders

STWRMH

Head dedicated for strength weld removal. Heads are easy to align and sized per tube diameter.

Go to datasheet.

KRAIS Tube Expanders

TFMH

Tube facing milling head for tubes made of any type of material. Utilizes 6% cobalt inserts.

Go to datasheet.

Optional shafts

KRAIS Tube Expanders

MICROSHAFT

A system with interchangeable guide shafts. A complete set covers 10,0 to 15,0 mm ID tubes.

KRAIS Tube Expanders

MINISHAFT

A system with interchangeable guide shafts. A complete set covers 12,4 to 48,0 mm ID tubes.

Other optional accessories

KRAIS Tube Expanders

SPEED REDUCER

Easy to use gearbox for 3x speed reduction. Increases the torque, enabling the machine to generate a thick chip whilst reducing the cutting time.

KRAIS Tube Expanders

SAV-500 SPEED ADJUSTMENT VALVE

The solution for all pneumatic drove beveling machines. Allows adjusting cutting speed to suit to the machined tube diameter.

KRAIS Tube Expanders

FAST CLAMPING SYSTEM

System offers rapid tube to tube cycle time, increased productivity (up to 4x) with little operator fatigue. Ideal for large amount of end preps.

Krais Tube Expanders

RATCHET FEED

Feed system allowing to work in narrow and tight locations, eg. in water walls.

Locking range with optional jaws

SHAFT: SHAFT20

RANGE [MM] RANGE [INCH] JAWS EXT. SPRING
MIN MAX MIN MAX NR QTY.
20 24 0,787 0,945 NS-0 SP-19 1
24 28 0,945 1,102 NS-1 SP-19 1

SHAFT: SHAFT25

RANGE [MM] RANGE [INCH] JAWS EXT. SPRING
MIN MAX MIN MAX NR QTY.
77 82 3,031 3,228 NS-8 NS-10 SP-25 2
82 87 3,228 3,425 NS-5 NS-20 SP-25 2
87 92 3,425 3,622 NS-6 NS-20 SP-25 2
92 97 3,622 3,819 NS-7 NS-20 SP-25 2
97 102 3,819 4,016 NS-8 NS-20 SP-25 2
102 107 4,016 4,213 NS-5 NS-30 SP-25 2

SHAFT: MINISHAFT

RANGE [MM] RANGE [INCH] JAWS NR
MIN MAX MIN MAX
12,40 14,50 0,488 0,571 201 MM#36
13,90 16,00 0,547 0,630 203 MM#36
15,90 18,00 0,626 0,709 205 MM#36
16,90 19,00 0,665 0,748 207 MM#36
18,90 21,00 0,744 0,827 209 MM#36
19,90 22,00 0,783 0,866 211 MM#36
20,90 23,00 0,823 0,906 213 MM#36
21,90 24,00 0,862 0,944 214 MM#36
23,60 25,60 0,929 1,008 215 MM#36
25,20 27,20 0,992 1,071 217 MM#36
26,80 28,80 1,055 1,134 219 MM#36
28,40 30,40 1,118 1,197 221 MM#36
30,00 32,00 1,181 1,260 223 MM#36
31,60 33,60 1,244 1,323 225 MM#36
33,20 35,20 1,307 1,386 227 MM#36
34,80 36,80 1,370 1,449 229 MM#36
36,40 38,40 1,433 1,512 231 MM#36
38,00 40,00 1,496 1,575 233 MM#36
39,60 41,60 1,559 1,638 235 MM#36
41,20 43,20 1,622 1,701 237 MM#36
42,80 44,80 1,685 1,764 239 MM#36
44,40 46,40 1,748 1,827 241 MM#36
46,00 48,00 1,811 1,890 243 MM#36

SHAFT: MICROSHAFT

RANGE [MM] RANGE [INCH] JAWS NR
MIN MAX MIN MAX
10,00 11,00 0,394 0,433 301 MM#36
11,00 12,00 0,433 0,472 303 MM#36
12,00 13,00 0,472 0,512 305 MM#36
13,00 14,00 0,512 0,551 307 MM#36
14,00 15,00 0,551 0,591 309 MM#36