MiniMill 201

KRAIS Tube Expanders

The MiniMill 201 is a rugged, fast, portable weld end preparation lathe for various tubes including stainless steel and other high chromium alloys. A standard machine comes complete with a 60 mm head, a locking system and includes all jaw sets to cover sizes of 20 to 44 mm (0.787” to 1.732”)

Standard working range

APPLICATION RANGE LOCKING RANGE (ID)
12,5– 57,0 mm 20,0 – 44,0 mm
0,492 – 2,250” 0,787 – 1,732”

Motor parameters

FEED STROKE FREE SPEED POWER TORQUE
20 mm 0,787” 200 Rpm 1,3 Hp 72 Nm 53 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

SHAFTS 20

Redesigned heavy duty locking system. Shafts and jaws are longer and wider to ensure maximum clamping force. The jaws are self-align.

KRAIS Tube Expanders

60 MM (2,36”)

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

Locking range in standard set up

Locking ranges with standard shaft20 jaws

RANGE [MM] RANGE [INCH] JAWS EXT. SPRING
MIN MAX MIN MAX NUMBER QTY.
20 24 0,787 0,945 NS-0 SP-19 1
24 28 0,945 1,102 NS-1 SP-19 1
28 33 1,102 1,299 NS-2 SP-19 1
33 38 1,299 1,496 NS-3 SP-20 2
38 43 1,496 1,693 NS-4 SP-20 2
43 48 1,693 1,890 NS-5 SP-20 2

Optional heads

KRAIS Tube Expanders

88 MM (3,46”)

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

KRAIS Tube Expanders

OBMH

Outside bevelling of both tubes and pipes. Sized per tube or pipe diameter and angle of required weld bevel.

Go to datasheet.

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SWROTC

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

Go to datasheet.

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STWRMH

Custom designed head dedicated for strength weld removal. Heads are sized per tube diameter.

Go to datasheet.

Optional shafts

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MICROSHAFT

A system with interchangeable guide shafts. A complete set covers 9,0 to 15,0 mm inside diameter.

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MINISHAFT

A system with interchangeable guide shafts. A complete set covers 12,7 to 25 mm inside diameter.

Additional accesories

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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.

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SPEED ADJUSTMENT VALVE SAV-500

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

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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.

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LEVER FEED

Quick and easy feed system. Used in many basic applications.

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RATCHET FEED

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

Locking range with optional jaws

Locking ranges with optional minishaft jaws

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

Locking ranges with optional microshaft jaws

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

Example tool application