Johnford BMC Series โ Table-Type Horizontal Boring Mills
Johnford Boring Mills are the heaviest horizontal boring mills in their class!
Machines in the Johnford BMC series of three Johnford table-type horizontal boring mills are engineered with a moving column for the Z axis and a moving table for the X axis. The design provides maximum rigidity and accuracy as well as full support of the table over the complete X axis travel. The X axis is supported by the base with absolutely no overhang, eliminating any need for outriggers or outboard supports to handle high table loads. The machinesโ massive construction further enhances rigidity and consistent performance.
Machine X-Y-Z travels range from 79โณ x 71โณ x 63โณ (2006 mm x 1803 mm x 1600 mm) to 157โณ x 118โณ x 63โณ (3987 mm x 2997 mm x 1600 mm). The smallest table size is 55โณ x 66โณ (1397 mm x 1676 mm), and the largest 98โณ x 79โณ (2489 mm x 2006 mm)
Depending on the machine, spindle power ranges from 35 hp to 50 hp and rpm from 3,000 to 2,000. All spindles feature two-speed gearboxes.
Capacity of the standard automatic toolchanger is 60 tools, with 90,120 and 180 tool capacity optional. Standard equipment also includes linear scales in all axes, a full B-axis rotary table, 300 psi through-spindle coolant, a chip conveyor, and a spindle and gearbox cooler.
Specifications
| Item / Model |
BMC-110
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BMC-130
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BMC-160
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|---|---|---|---|
|
Photos |
 |
|
|
|
X Travel (in.) |
79 |
118 |
157 |
|
Y Travel (in.) |
71 |
90.5 |
118 |
|
Z Travel (in.) |
63 |
63 |
63 |
|
W Travel (in.) |
21.7 |
27.5 |
27.5 |
|
V Travel (in.) |
n/a |
n/a |
n/a |
|
Spindle Bar (in.) |
4.33 |
5.1 |
6.3 |
|
Table Size (in.) |
55 x 63 |
71 x 63 |
98 x 79 |
|
Max. Workpiece Load (lbs.) |
26,400 |
33,000 |
55,000 |
|
Spindle (hp.) |
35 |
50 |
50 |
|
Spindle (rpm) |
3000 |
2500 |
2000 |
|
Spindle Speed Steps |
2 |
2/3 (opt.) |
3 |
|
Spindle Drive |
2 Speed Gearbox |
2 Speed Gearbox |
2 Speed Gearbox |
|
RPM |
3,000 |
2,500 |
2,000 |
|
ATC Capacity |
60 (90/120/180 opt.) |
60 (90/120/180 opt.) |
60 (90/120/180 opt.) |
|
Weight (lbs.) |
75,000 |
88,000 |
110,000 |
FAQs
What is the max table load capacity on a table-type boring mill?
At Absolute Machine Tools, we have boring mills that can hold up to 55,000 lb. table loads.
What are some examples of common parts made using boring mills?
Horizontal boring mills are used for many applications, including oil and gas frack blocks, large manifolds, gearbox housings for a variety of industries, energy-related parts, transmission housings, and forgings.
Do your machines come standard with a B-axis rotary table or just an indexer?
At Absolute Machine Tools, our machines come standard with a full B-axis rotary table (.001 degree).
