Topwell 3-GL knee mill with electronic variable speed 6000 rpm head

Questions ?
Call us at 905-624-5536

H.H. Roberts Machinery Limited
1324 Matheson Blvd E., Mississauga, Ontario, Canada. L4W-2Z7, Fax 905-624-9065

Topwell 3-RG and 3-GL

Freatures

RG models: have a back geared head delivering great torque at low rpm. 15 to 750 rpm in low and 75 to 6,000 in high.

GL models: are direct drive without back gear and is a good simpler head for light alloys and plastic. Speeds are 75 to 6,000 rpm
the spindle motor is 3 Hp and can deliver 4-1/2 Hp (30 minutes). It is a true inverter motor balanced to 7,200 rpm with a integral constant speed blower for cooling.
the drive is like a machining center with no vari-discs or mechanical brakes to rob power. Amost all the power is delivered to the cutter.
12" x 50" table with hardened top ( 10" x 50" and 10" or 12" x 45" optional )
available for 208V, 230V, 460V 3 phase and optionally 220/1/60
32" x 16" travels with the power feed. 35-1/2" without power feed
hardened and ground X and Y axes with Turcite counterslide on saddle
hardened and ground vertical slideways
two peice leadscrew nuts for excellent backlash reduction
power feed on table - standard
central lubrication system
the vector drive head is an in house development that is enjoying success as a replacement head for older Bridgeport's and Bridgeport clones. Click here for details.

Options

# 30 or # 40 spindle to accept Cat-V, BT or NMTBA tooling.
The 40 taper spindle has 3 heavy lower bearings.
Acu-Rite , Heidenhain or Fagor readouts
coolant system
chip pan
side splash guards
riser blocks
cross slde feed
knee lift
ballscrws on X and Y
Elesa delux round handwheels with folding grips
air power draw bar
E-stop button
Halogen worklight
timed automatic central lubrication system
built in transformer for 120 volt accessories like DRO, power feed and worklight.

Topwell 3-GL knee type milling machine with Anilam digital readout

GL model shown
Shown with optional power draw bar

The top spindle is Towpell's special # 40 taper. There are 3 sets of high precision P4 bearings
at the bottom and a single bearing at the top. This gives extra rigidity and vibration resistance.
We normally set these up to use Cat-V-40 tools.
For comparison, below it is a standard spindle in a Bridgeport type R-8 spindle, at the bottom with
only 2 high precision bearings at the bottom.

Specifications	3-GL	3-RG
Table size: standard	1070 x 254mm, 10" x 50"
Table sizes: optional	1270 x 254 10" x 54", 10" x 50", 10" x 42"
Table travel ( standard )	914mm 36" travel is reduced about 2" with a power feed attached
Cross travel	400 mm 15.75 "
Knee travel	16 "
Quill diameter	3 3/8"
Quill travel	5"
Ram travel	20 "
Spindle motor	3 HP continuous, 4 1/2 30 minutes
Spindle taper	R-8 optionally #40 (Cat-V-40 ) or # 30 ) see picture above
Quill power feeds	0.0381, 0.0762, 0.152 mm / Rev.
Spindle speeds	50 - 4,000 or 75 - 6,000	Lo 15 - 750 Hi 75 - 6,000
Weight	2,750 lbs

Available with

CNC
We offer the Acu-Rite Millpwr CNC control. This has to be the easiest CNC to run, program and make money with.
Details:

Click here to download our knee mill catalogue.