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HH Roberts Machinery Ltd
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Call us at 905-624-5536

Vector Drive Heads.

Back Geared Versions are Here !

Now in stock.  We have back geared versions of the R-8 heads available for customers that need higher torque at low RPM.    Back-geared versions of the larger #40 heads with 7 1/2 Hp drive should be here in April.   Speeds 15 to 750 in low and 100 to 6,000 in high.
 
Now with more reliable Yaskawa drives
which are assembled in the USA and mounted in the heads in our own shop.
Upgrades are available for current users.

  Now in stock.
New 10 Hp and 15 Hp models.
Upgrades are possible for customers that already have our 5-GL heads!!!

Replacement heads for Bridgeport, Topwell, First, Supermax mostTaiwan made Bridgeport clones.

A complete system.  The head will bolt directly onto Bridgeport or Bridgeport clone rams.  Mount the drive on the back of the column and connect your power supply.  The head is fully wired and ready to go.

Only 3 moving parts in the direct drive belt housing. About 85 fewer parts than a vari-disk type head. Almost zero maintenance.

Speeds up to 6,000 RPM.

These heads are ideal for upgrading quill type CNC machines because they can be controlled by most CNCs. We use the same vector drives on our CNC mills and machining centres  They can orient and reverse fast enough for rigid tapping.

Click here to download the heads catalog.

Click here to download the drawing of the head mount for the Bridgeport size ( 4 1/2 Hp )

Click here to download the drawing of the head mount for the heavy 7 1/2 to 15 Hp heads.

Showing the HH Roberts milling head on a old Bridgeport milling machine

Showing the heavy 7 1/2 Hp milling head 4 1/2 Hp version shown with R-8 spindle. # 30, # 40 and Erickson spindles are available.
Shown below a head with #40 Cat CNC tooling and with the optional power draw bar.

Direct drive head 100 to 6,000 rpm

Back geared head  15 to 750 rpm and 100 to 6,000 rpm
This is the 7 1/2 to 15 Hp head suitable for fitting to our Topwel, some Hurco, Webb and Kent machines.  It is pictured with an Amercian made Hi-Torque power draw bar.

Direct drive head 100 to 6,000 rpm or flip the belt to low range
of 65 to 4000

Back geared head  15 to 750 rpm and 100 to 6,000 rpm
A left side view of the HH Roberts 7 1/2 Hp milling machine head with a face mill.

Parts diagram for the HH Roberts Milling head

This diagram shows the moving parts in the top half of the head.  It is in fact a lot like today's modern machining centers with the drive train consisting of

1) the motor shaft and pulley
2) the drive belt
3) the spindle pulley and splined coupling
4) The spindle itself ( not shown )

There are about 85 fewer moving parts. Maintenance is near zero and is normally only a replacement of the timing belt after years of service.


Adapter Drawings and Photos
Bridgeport sized head
H-D #40 taper head
dimensioned drawing
dimensioned drawing
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photo #1
photo #2
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