Johnford SDMC Series – Sliding Column Bridge Mills

The six machines in the Johnford SDMC series of heavy duty sliding double column machining centers feature a moving column and fixed table for unlimited table loads. With standard accessories the Meehanite cast iron machines weigh nearly 150,000 lbs. The machines can be configured to fulfill any large-part production requirements.

Looking for a different size/capability? Check out other models in the DMC Series:

  • DMC Series – 900mm – 1500mm Moving Table/Fixed Column Bridge Mills
  • DMC Series – 1600mm – 6100mm Moving Table/Fixed Column Bridge Mills
  • S/SH Series – 2100mm – 6100mm with 1780mm (70″) Extended Y-Axis Travel
  • P/PH Series – 3100mm – 6100mm with 2300mm (90.5″) Extended Y-Axis Travel
  • L/LH Series – 3100mm – 6100mm with 2800mm (110.2″) Extended Y-Axis Travel
  • Fixed/Moving Column & 5-Axis/5-Face – 4000mm – 6000mm+W

The SDMC series can be expanded from 5 meters (196″) up to 20 meters (787″) of X axis travel. A rugged 90˚ bridge with offset Y-axis ways and a 48″ (1,220 mm) wide saddle keeps the spindle center line extremely close to the bridge for rigidity. This design also gives a full 48″ (1,220 mm) span across the Y-axis ways for optimum support of the massive headstock. The bridge and traveling head feature square box ways coated with Turcite and have been designed with diagonally arranged ribs that will help reduce the amount of distortion that can result from years of continued service.

Column traverse is accomplished via two sets of heavy duty Schneeberger linear ways under each column and twin 3.15″ (80 mm)-dia. ballscrews up to 9 meters (354″) long in the X axis. To eliminate whip and vibration, the X-axis ballscrews are fixed and the ball nuts are spun by servo motors. SDMC bridge mills with 10 meters of X travel and larger use twin precision rack and pinion drives. The CNC synchronizes the servo motors to eliminate crabbing effect. Twin Heidenhain glass scales are standard on the X-axis to enhance positioning accuracy. W-axis capability is optional.

A spindle motor of 35 hp delivers power through a two speed gearbox. Tooling is CT-50 (HSK-100), and the machines feature a 40-tool capacity automatic toolchanger.

Specifications

Item / Model
SDMC-5000 Request a Quote
SDMC-6000 Request a Quote
SDMC-7000 Request a Quote
SDMC-8000 Request a Quote
SDMC-9000 Request a Quote
SDMC-10000 Request a Quote

X Travel

197″

236″

275″

315″

354″

394″ – 984″

Y Travel

72″ – 197″

72″ – 236″

72″ – 236″

72″ – 236″

72″ – 236″

72″ – 236″

Z Travel

42″ (48″/59″ opt.)

42″ (48″/60″ opt.)

42″ (48″/60″ opt.)

42″ (48″/60″ opt.)

42″ (48″/60″ opt.)

42″ (48″/60″ opt.)

Distance Between Columns

71″ – 197″

71″ – 236″

71″ – 236″

71″ – 236″

71″ – 236″

71″ – 236″

W Axis (opt.)

39.4″ – 78.7″

39.4″ – 78.7″

39.4″ – 78.7″

39.4″ – 78.7″

39.4″ – 78.7″

39.8″ – 78.7″

Table Size

197″ x 52″ – 157″

236″ x 52″ – 157″

275″ x 52″ – 216″

315″ x 52″ – 216″

354″ x 52″ – 216″

394″ x 52″ – 139″
984″ – 134″

Table Load

11,000 lbs./M2

11,000 lbs./M2

11,000 lbs./M2

11,000 lbs./M2

11,000 lbs./M2

11,000 lbs./M2

Rapid Traverse (XYZ)

394 IPM (787 opt.)

394 IPM (787 opt.)

394 IPM (787 opt.)

394 IPM (787 opt.)

394 IPM (787 opt.)

394 IPM (787 opt.)

CNC Control

Fanuc Oi-MF Plus or
31i-MB Plus

Fanuc Oi-MF Plus or
31i-MB Plus

Fanuc Oi-MF Plus or
31i-MB Plus

Fanuc Oi-MF Plus or
31i-MB Plus

Fanuc Oi-MF Plus or
31i-MB Plus

Fanuc Oi-MF Plus or
31i-MB Plus

Spindle Taper

CAT-50 (BT-50 opt.)

CAT-50 (BT-50 opt.)

CAT-50 (BT-50 opt.)

CAT-50 (BT-50 opt.)

CAT-50 (BT-50 opt.)

CAT-50 (BT-50 opt.)

Spindle Speed

6,000 RPM (up to 15,000 opt.)

6,000 RPM (up to 15,000 opt.)

6,000 RPM (up to 15,000 opt.)

6,000 RPM (up to 15,000 opt.)

6,000 RPM (up to 15,000 opt.)

6,000 RPM (up to 15,000 opt.)

Spindle Motor

35 HP

35 HP

35 HP

35 HP

35 HP

35 HP

Spindle Drive

2 Speed Gearbox

2 Speed Gearbox

2 Speed Gearbox

2 Speed Gearbox

2 Speed Gearbox

2 Speed Gearbox

ATC Capacity

40 (60/80/120 opt.)

40 (60/80/120 opt.)

40 (60/80/120 opt.)

40 (60/80/120 opt.)

40

40

Weight (est. base only)

150,000 lbs.

142,000 lbs.

170,000 lbs.

220,000 lbs.

264,000 lbs.

240,000 – 300,000 lbs.+

Item / Model
SDMC-5000x1800-5000+5F Request a Quote
SDMC-6000×1800-6000+5F Request a Quote
SDMC-7000x2800-6000+5F Request a Quote
SDMC-8000x2800-6000+5F Request a Quote
SDMC-9000x2800-6000+5F Request a Quote
SDMC-10000-25000×1800-6000+5F Request a Quote

X Travel

197″

236″

275″

315″

354″

394″ – 984″

Y Travel

71″ – 197″

71″ – 236″

110″ – 236″

110″ – 236″

110″ – 236″

110″ – 236″

Z Travel

42″ (48″/60″ opt.)

42″ (48″/60″ opt.)

42″ (48″/60″ opt.)

42″ (48″/60″ opt.)

42″ (48″/60″ opt.)

42″ (48″/60″ opt.)

Distance Between Columns

71″ – 158″

71″ – 158″

110″ – 158″

110″ – 158″

110″ – 158″

110″ – 158″

W Axis (opt.)

39.4″ – 78.7″

39.4″ – 78.7″

39.4″ – 78.7″

39.4″ – 78.7″

39.4″ – 78.7″

39.8″ – 78.7″

Table Size

197″ x 52″ – 197″ x 138″

236″ x 51″ – 236″ x 138″

275″ x 87″ – 138″

315″ x 87 – 134″

354″ x 87 – 134″

394″ x 138″

Table Load

11,000 lbs./M2

11,000 lbs./M2

11,000 lbs./M2

11,000 lbs./M2

11,000 lbs./M2

11,000 lbs./M2

Rapid Traverse (XYZ)

394 IPM (787 opt.)

394 IPM (787 opt.)

394 IPM (787 opt.)

394 IPM (787 opt.)

394 IPM (787 opt.)

394 IPM (787 opt.)

CNC Control

Fanuc Oi-MF Plus or
31i-MB Plus

Fanuc Oi-MF Plus or
31i-MB Plus

Fanuc Oi-MF Plus or
31i-MB Plus

Fanuc Oi-MF Plus or
31i-MB Plus

Fanuc Oi-MF Plus or
31i-MB Plus

Fanuc Oi-MF Plus or
31i-MB Plus

Spindle Taper

CAT-50 (BT-50 opt.)

CAT-50 (BT-50 opt.)

CAT-50 (BT-50 opt.)

CAT-50 (BT-50 opt.)

CAT-50 (BT-50 opt.)

CAT-50 (BT-50 opt.)

Spindle Speed

6,000 RPM

6,000 RPM

6,000 RPM

6,000 RPM

6,000 RPM

6,000 RPM

Spindle Motor

35 HP (50 opt.)

35 HP

35 HP

35 HP

35 HP

35 HP

Spindle Drive

2 Speed Gearbox

2 Speed Gearbox

2 Speed Gearbox

2 Speed Gearbox

2 Speed Gearbox

2 Speed Gearbox

ATC Capacity

40 (60/80/120 opt.)

40 (60/80/120 opt.)

40 (60/80/120 opt.)

40 (60/80/120 opt.)

40 (60/80/120 opt.)

40 (60/80/120 opt.)

Weight (est. base only)

136,000 – 160,000 lbs.

121,000 – 175,000 lbs.

140,000 – 175,000 lbs.

150,000 lbs.

175,000 – 264,000 lbs.

212,000 – 300,000 lbs.+

Item / Model
SDMC-5000x1800-4000 Request a Quote
SDMC-6000×2800+5F Request a Quote
SDMC-7000x2800+5F Request a Quote
SDMC-8000x2800+5F Request a Quote
SDMC-9000x2800+1MW+5F Request a Quote
SDMC-12000×4000+5F Request a Quote

X Travel

197″

236″

275″

315″

354″

472″

Y Travel

142″

142″

142″

142″

189″

189″

Z Travel

42″ (48″/59″ opt.)

42″ (48″/60″ opt.)

42″ (48″/60″ opt.)

42″ (48″/60″ opt.)

42″ (48″/60″ opt.)

42″ (48″/60″ opt.)

Distance Between Columns

110″

110″

110″

110″

157.5″

157.5

W Axis (opt.)

39.4″ – 78.7″

39.4″ – 78.7″

39.4″ – 78.7″

39.4″ – 78.7″

39.4″ – 78.7″

39.8″ – 78.7″

Table Size

197 x 86.6″

236″ x 86.6″

275″ x 86.6″

315″ x 86.6″

354″ x 133.8

472″ x 137.8″

Table Load

11,000 lbs./M2

11,000 lbs./M2

11,000 lbs./M2

11,000 lbs./M2

11,000 lbs./M2

11,000 lbs./M2

Rapid Traverse (XYZ)

394 IPM

394 IPM

394 IPM

394 IPM

394 IPM (787 opt.)
W-Axis 157 IPM

394 IPM

CNC Control

Fanuc Oi-MF Plus or
31i-MB Plus

Fanuc Oi-MF Plus or
31i-MB Plus

Fanuc Oi-MF Plus or
31i-MB Plus

Fanuc Oi-MF Plus or
31i-MB Plus

Fanuc Oi-MF Plus or
31i-MB Plus

Fanuc Oi-MF Plus or
31i-MB Plus

Spindle Taper

CAT-50 (BT-50 opt.)

CAT-50 (BT-50 opt.)

CAT-50 (BT-50 opt.)

CAT-50 (BT-50 opt.)

CAT-50 (BT-50 opt.)

CAT-50 (BT-50 opt.)

Spindle Speed

6,000 RPM

6,000 RPM

6,000 RPM

6,000 RPM

6,000 RPM

6,000 RPM

Spindle Motor

35 HP

35 HP

35 HP

35 HP

35 HP

35 HP

Spindle Drive

2 Speed Gearbox

2 Speed Gearbox

2 Speed Gearbox

2 Speed Gearbox

2 Speed Gearbox

2 Speed Gearbox

ATC Capacity

40 (60/80/120 opt.)

40 (60/80/120 opt.)

40 (60/80/120 opt.)

40 (60/80/120 opt.)

40

40

Weight (est. base only)

136,000 lbs.

143,000 lbs.

170,000 lbs.

220,000 lbs.

264,000 lbs.

240,000

  • Coolant system
  • Spindle air blast
  • Heat exchanger
  • Twin Screw-type chip conveyors
  • Chain-type chip conveyor
  • Operation box
  • Tools, tool box, and various manuals
  • Rigid tapping
  • Spindle oil cooler
  • Manual guide i
  • Oi-MF Plus controller
  • Contact tool setting system
  • High pressure coolant thru spindle
  • 60, 80, 120 Tools
  • Workpiece measuring system
  • Z-Axis travel 1200/1500mm
  • W-Axis travel 1000-2000mm
  • 5Face head
  • 2-Axis NC milling head
  • 90Ëš Milling head
  • Multi-angular milling head
  • Twin spindle 2H
  • 31-MB Plus controller

FAQs

Can you customize X,Y, and Z travels in the Johnford DMC series?

Yes, Johnford can build machines in the DMC series with up to 240 inches in x-travel and up to 157 inches in y-travel. Johnford will also customize the DMC series with up to 2 meters of w-axis travel.

What are some examples of common parts made using bridge mills?

Weldments, molds, dies, plate work, forgings

Does Johnford have a full 5-axis head configuration?

Yes, with spindle speeds from 4,000 rpm with a 2-speed gearbox up to 20,000 rpm with an integral spindle motor.

Does the Johnford DMC series offer a solution for high speed and complex 3D machining?

Yes. Johnford offers our DMC Hi-Net series with spindles ranging from 15,000 rpm in an HSK-100A to 24,000 rpm in an HSK-63A with features such as Fanuc 31i-MB control, thermal growth automatic compensation, and Heidenhain linear scales on X, Y, and Z axes.