- المجال: Industrial machinery
- Number of terms: 990
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On the 2000-series mills, a "ram" is added that allows the entire column to be moved in and out and swung from side to side. It is designed based around the movements of the machine shop workhorse - the Bridgeport® mill.
Industry:Industrial machinery
The normal (rear) position gears the motor down about 2:1 for a maximum speed of about 2800 RPM. The "High Torque" position (closest to the headstock) gears it about 4:1 for lower speed but more torque when needed for heavy cuts.
Industry:Industrial machinery
A Kevlar-reinforced Urethane belt that drives the spindle through the pulleys.
Industry:Industrial machinery
Moves the headstock 1. 25" further out from the saddle to increase the "throat" distance (distance between cutter and column). It is optional on 5000-series mills, standard on 5400-series mills and not needed on 2000-series mills because the ram can be used to adjust this distance.
Industry:Industrial machinery
A precision ground key that fits in a slot in the column saddle to keep the headstock aligned straight up and down. A second slot is also provided to locate the headstock at 90° for horizontal milling. Removing this key and rotating the headstock allows bevels to be cut at any angle. An approximate angle scale is laser engraved into the saddle for reference.
Industry:Industrial machinery
The lock works like tightening two nuts against each other on a threaded shaft to reduce play in the threads. Backlash is the pause in travel when changing direction of rotation of any threaded crew. Because both sides of the thread don't rub on the nut at the same time (they would quickly wear out), one surface is pulling or pushing the nut when the screw is turned. When you stop and change directions, the screw turns a slight amount while the thread picks up the other side and begins to move the nut in the other direction. The looser the fit of the threads, the more "backlash" occurs. In essence, it is the amount you can turn the handwheel in the reverse direction before movement occurs on an axis. . An adjustment is provided on the X- and Y-axes to reduce the leadscrew backlash. Backlash is not a "fault" of a machine, it is simply a physical reality that must be taken into account when machining. You adjust to a known or acceptable amount using the locks and then remove it from the machining operation by always approaching your cut from the same direction with the backlash already eliminated before the cut begins.
Industry:Industrial machinery
A screw that goes through the barrel lock on the front of the saddle to lock the table in place during machining operations where movement is not required or desired.
Industry:Industrial machinery
A thumbscrew on the side of the base that keeps the saddle from moving in and out when tightened.
Industry:Industrial machinery
Round steel bars used to tighten and loosen chucks and other spindle accessories. Sometimes called spindle bars.
Industry:Industrial machinery
The arbor screws into the back of the drill chuck so it can be used in the headstock. It is held in place in the #1 Morse taper with the drawbolt.
Industry:Industrial machinery
