Chapter 9: Drilling Methods and Machines | Cutting Tool Applications | American Machinist All drilling machines operate on the same basic principle. The spindle turns the cutting …Web

I have never had a problem aligning. the head. When the head is raised or lowered and the spindle center moves, just move the table to suit. I made two indexing …Web

Your quill is about 12" (1 foot) or so from the column so you have an 18 to 1 advantage and should be under 0.001" that way. Judging a laser dot or pair of them from 18 feet away without a scope is not very conducive to good accuracy. PS: You will find this group more friendly to questions about your round column mill:Web

An attachment may exist to extend mills to the same level as a drill, and some people are happy with these. Harbor Freight technical support (1-800-444-3353 or 1-888-866-5797) are in general clueless. What you can do …Web

Spindle and press into position on an arbor press. Slip the quill over the spindle held in an upright position and work bearings into place. Bearings may be seated against quill shoulder by tapping spindle nose. Replace long spacer (M-10) on spindle from top. 4. Place a bearing, correct spacers (M11, M12) and another bearing on spindle.Web

Column. It is also called a pillar. The column is typically a hollow, cylindrical component the joins the base, table, and head. Moreover, the column functions as a linear slide on which the table is raised and …Web

Unlike a knee or dovetail column mill, instead of just planning on moving things when needed as the job proceeds, you think about how can I work without changing Z zero where Z zero is the face of the spindle with the quill fully retracted. The patron saint of round column mills is Wile E. Coyote or perhaps Heath Robinson / Rube Goldberg.Web

1. Remove the quill retaining ring. Use your retaining ring pliers to remove the retaining ring from the quill assembly. 2. Separate the quill and spindle. Adjust your vice so the opening is large enough for the quill, …Web

To tram your RF 31 make marks on the table centered on the quill that duplicates the column bolt pattern. Take a reading with your DI at each mark. Set the DI to zero at the biggest reading. Then measure each mark again. You will now know how much you need to shim each bolt to tram your mill/drill.Web

Often we have to settle for one of the Rong Fu or RF clones -- RF-20, RF-25, RF-30 or Rf-31-- round column mill/driils. I have both an HF mini-mill and and RF-31 (Taiwan made). And while the mini-mil is a nice for small parts, the RF-31 is in an entirely different league. The mill weighs well in excess of 400 pounds and you need an engine …Web

01-12-2017, 10:37 PM. I forgot to mention: Tempory chip guard removed for photo, machine in low gear to hold spindle from rotation, UNPLUG the …Web

A group to hang out and talk about round column mills.Web

The round collumn was one of the biggest frustrations with a mill drill. The biggest problem is that any time, you would want to raise or lower the table when working on a knee mill, on the round collumn mill drill as Ray said, you need to stop raise the head rezero the table relocate and relocate your cutter, as the head has shifted in position just …Web

Remove the quill from the machine, along with other parts that may be in the way of the cut. Cut a slit in the housing parallel to the axis of the quill. The cut allows the bore to …Web

3-15 30206J Bearing upper spindle 30x62x17.25. To replace them: 1. remove the spring for the spindle return on the left side of the head after locking the quill. 2. remove or at least disengage the down feed pinion by removing the two screws holding the fine down feed on the right side of the head.Web

64 Reaction score 27 Location Menomonie, Wisconsin Jul 18, 2023 #21 I have a round column Grizzly G1126 mill drill that came with a good vise, a hold down …Web

A problem with all round column mills, is that you loose your zero and need to square the head each time you raise or lower the head. This problem is compounded by the fact that mills are short and drills are long, so it can …Web

Coolidge wrote:Tip: The #1 gripe about a round column mill/drill like this Jet is losing position left/right if you have to raise or lower the head. Verses one of the many square dovetail column benchtop mills. With the centering scope you can mark your position, raise/lower the head and dial right back onto your position.Web

First thing's first. If you want to remove the spindle, you DO NOT need to take the pulley off. But if you wanted to here's how. (Then we'll get back to the spindle/quill removal …Web

The first step was to place a straight shaft ( McMaster Carr – ½" ceramic coated aluminum, 15″ or longer (1031K14, $9) in a collet and make sure it is mounted on …Web

It's your basic round column "heavy" mill/drill and I must have bought it almost 20 years ago. Though it's running fine, I have this overwhelming desire to pull the spindle apart and inspect and re-grease the bearings. ... ill-drill-spindle-quill-removal-procedure.htm . C. Conrad Hoffman Registered. Registered. Joined Nov 20, 2010 …Web

spring that lifts the quill. This allows one to use the drill-press style handle or by engaging the worm feed one can use the handwheel. Since the load is always up the backlash in the worm isn't an issue. If the quill is sticky, this won't work well for you. You might try cleaning and lubing the quill to see if that helps. Good luck - - BartWeb

233. Nov 13, 2016. #1. Two years ago I posted a thread on keeping the X on my King PDM30 by fixing the rack to the column, and attaching two tight fitting guide blocks on the head. I was getting .001" repeatability. As a method of checking I set a 1-2-3 block in the vise, edge found the X and Y, set both the DRO and lead screw dials to zero ...Web

To tram your RF 31 make marks on the table centered on the quill that duplicates the column bolt pattern. Take a reading with your DI at each mark. Set the DI …Web