MiniMill 300FF

KRAIS Tube Expanders

A standard machine for Fin Fan cooler tube trimming is equipped with custom head and locking system to suit your application (customer to provide drawing of unit). The MiniMill 300FF cutter heads have 3 carbide inserts with 4 Cutting edges each.

Standard working range

APPLICATION RANGE (ID-OD) LOCKING RANGE (ID)
12,5– 51,0 mm Depends on attachment
0,492 – 2,000”

Motor parameters

FEED STROKE FREE SPEED POWER TORQUE
20 mm 0,787” 300 Rpm 1,3 Hp 43 Nm 32 Ft.Lbs
Air use: 55 cfm 1,3 m3/min Body width: 2,32” 59 mm
Body height: 13,1” 335 mm Body weight: 13,2 Lbs 6 kg

Standard set up

KRAIS Tube Expanders

FINFAN ATTACHMENT

Special attachment for facing tubes in fin fan gas coolers. A locking shaft with adjustable length and a support bushing are screwed into the plug thread, making this tool the best one available on the market today. The cycle is approx. 1 min from tube to tube. For this application we recommend our 300 Rpm machine.

Finfan attachment by numbers

Finfan attachment part numbers

FINFAN ATTACHMENT TUBE CAPACITY INSERT NO. INSERTS SCREW JAWS COVER
[INCH] [MM] BWG MIN MAX
601-FinFan-1-12” 1,000 25,40 12-23 CI 3 1 1/8 207MM#36 213MM#36
603-FinFan-1-1/8-12” 1,125 28,58 12-23 CI 3 1 1/4 211MM#36 217MM#36
605-FinFan-1-1/4-12” 1,250 31,75 11-23 CI 3 1 3/8 103MM#36 107MM#36
607-FinFan-1-1/2-12” 1,500 38,10 11-23 CI 3 1 5/8 107MM#36 111MM#36
609-FinFan-1-3/4-12” 1,750 44,45 9-23 CI 3 1 7/8 111MM#36 115MM#36
611-FinFan-2-12” 2,000 50,80 9-23 CI 3 2 1/8 115MM#36 119MM#36

Available lengths

MODEL LENGTH
[MM] [INCH]
601-FinFan-xx-6 152,4 6”
601-FinFan-xx-8 203,2 8”
601-FinFan-xx-10 254,0 10”
601-FinFan-xx-12 305,0 12”
601-FinFan-xx-14 355,6 14”
601-FinFan-xx-16 406,4 16”

Optional atachment

KRAIS Tube Expanders

FINFAN SEAL WELD REMOVAL ATTACHMENT

Simply the best solution for seal weld removal from air coolers. Adjustable length locking shaft and support bushing that fits into the plug thread, making this tool the best one available on the market today. A cycle time of approximately 1 min from tube to tube can be expected.

Additional accesories

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

SPEED ADJUSTMENT VALVE SAV-500

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

KRAIS Tube Expanders

RATCHET FEED

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

KRAIS Tube Expanders

LEVER FEED

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

Tool in action