Johnford SDMC Series โ 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.
The SDMC series can be expanded from 5 meters (196โณ) up to 20 meters (787โณ) of X axis travel. A rugged 90ห bridge with offset Y-axis ways and a 48โณ (1,220 mm) wide saddle keeps the spindle center line extremely close to the bridge for rigidity. This design also gives a full 48โณ (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 3.15โณ (80 mm)-dia. ballscrews up to 9 meters (354โณ) 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 42775_4aef94-b6> |
SDMC-5000
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42775_5b6e3c-a2>
SDMC-6000
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42775_5dcce3-17>
SDMC-7000
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42775_6385ad-6b>
SDMC-8000
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42775_d0e5b7-fb>
SDMC-9000
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42775_dfd0f3-99>
SDMC-10000
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42775_47b4f3-36>
---|---|---|---|---|---|---|
X Travel (in.) 42775_01394d-7b> |
196 42775_161509-fe> |
236 42775_3463d4-0d> |
275 42775_6cf07d-5f> |
315 42775_367eca-d1> |
354 42775_bc8a13-6c> |
394 42775_4717dc-97> |
Y Travel (in.) 42775_1e9e79-ba> |
72 โ 157 42775_69500c-f0> |
72 โ 157 42775_3a7800-52> |
72 โ 157 42775_2c7316-b9> |
72 โ 196 42775_e039ac-2b> |
72 โ 196 42775_a9c6c2-96> |
72 โ 196 / 236 42775_6e5905-e6> |
Z Travel (in.) 42775_ce8997-e8> |
32 / 42 42775_3091df-ef> |
32 / 42 42775_2268e9-b0> |
32 / 42 42775_b0265b-f3> |
32 / 42 42775_995301-bd> |
32 / 42 42775_3b0a2b-c8> |
32 / 42 42775_4dccbe-0d> |
Z Travel (in.) 42775_8b5664-90> |
41.7โณ 42775_2c1900-2f> |
41.7โณ 42775_10ee5d-48> |
41.7โณ 42775_b240de-49> |
41.7โณ 42775_7dd4ed-ff> |
41.7โณ 42775_207cb9-d9> |
41.7โณ 42775_8bbed1-84> |
W Axis 42775_56be6d-b0> |
Optional 42775_3e9f1c-bf> |
Optional 42775_0536b0-9e> |
Optional 42775_2b03b3-27> |
Optional 42775_635210-de> |
Optional 42775_679658-86> |
Optional 42775_03f611-7c> |
Table Load 42775_88f6f8-52> |
Unlimited 42775_b9b598-f4> |
Unlimited 42775_473ee4-28> |
Unlimited 42775_079970-0f> |
Unlimited 42775_f59ecb-ac> |
Unlimited 42775_c6ef48-a8> |
Unlimited 42775_41cb6b-8d> |
Rapids (in./min.) 42775_4a9e16-0b> |
472 / 787 42775_a76752-14> |
472 / 787 42775_39fcd1-a6> |
472 / 787 42775_5c0271-1a> |
472 / 787 42775_05d180-7e> |
472 / 787 42775_fa92b9-94> |
472 / 787 42775_97e4ca-3c> |
Control 42775_a888c3-a3> |
OiM-F 42775_cb3f00-29> |
OiM-F 42775_490b3f-be> |
OiM-F 42775_43544b-f6> |
OiM-F 42775_af9778-a9> |
OiM-F 42775_9232bd-f3> |
OiM-F 42775_99ec7c-36> |
Spindle Taper 42775_b0779c-7b> |
CT-50 (HSK-100) 42775_5b06ae-a1> |
CT-50 (HSK-100) 42775_90e7bc-9e> |
CT-50 (HSK-100) 42775_8cd862-f3> |
CT-50 (HSK-100) 42775_66b7eb-b7> |
CT-50 (HSK-100) 42775_fc3da9-f5> |
CT-50 (HSK-100) 42775_34ad93-88> |
RPM (K) 42775_c60985-f7> |
6 / 8 42775_bfcbbd-74> |
6 / 8 42775_c46a95-4d> |
6 / 8 42775_e757ed-b0> |
6 / 8 42775_b2afb9-53> |
6 / 8 42775_22c6c7-3a> |
6 / 8 42775_f6f98d-c1> |
Spindle (HP) 42775_fb51eb-c7> |
35 42775_3b41d1-c7> |
35 42775_2bc0f7-ee> |
35 42775_7d504e-e9> |
35 42775_0ae086-03> |
35 42775_c031cd-95> |
35 42775_558e0f-6a> |
Spindle Drive 42775_d57ddf-1d> |
2 Speed Gearbox 42775_eca86f-53> |
2 Speed Gearbox 42775_e762a3-3c> |
2 Speed Gearbox 42775_899450-1b> |
2 Speed Gearbox 42775_18b9de-d2> |
2 Speed Gearbox 42775_de2925-c9> |
2 Speed Gearbox 42775_173aac-59> |
ATC Capacity CAT 42775_cbb43c-8f> |
40 42775_d66e8c-29> |
40 42775_ada0fa-05> |
40 42775_667f8b-01> |
40 42775_81a5f0-84> |
40 42775_ca3eba-25> |
40 42775_20c30e-91> |
Weight (est. lbs.) 42775_37e04b-00> |
150,000 42775_f56888-37> |
150,000 42775_359c85-0a> |
165,000 42775_dfd4c3-9a> |
200,000 42775_63cdd0-c3> |
230,000 42775_fe21d5-54> |
230,000 42775_eec760-9e> |
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.