Drilling machines Spindles

The spindle of a horizontal machine is fixed and cannot be adjusted in an axial direction, i.e. along its axis. On vertical machines, provision is made for axial movement, which is controlled by a handwheel on the spindle head. The spindle runs in a quill which is moved through a rack and pinion in the same way as a drilling-machine spindle (see Fig. 8.2). A locking bolt is provided to lock the quill in any position along its operating length. 

SPINDLE runout The measure of the wobble present as the drilling machine spindle rotates 360°. 

PM83 Drilling machines. Guarding of spindles and attachments (1998)... 

Spindle assembhes are one of the single most important components of the drilling machine. Proper operation is essential and requires maintenance (e.g., collet and collet seat cleaning) and verification on a regular basis. 

When the selected algorithm is applied, the operator has some choices. One is to elect to go ahead and drill the board on the same machine if it happens also to be an x-ray drilling machine or the Intelli-Drill, since such machines are also high-predsion single spindle drillers with a 180,000 rpm spindle. This is the best choice because it does not require the operator to remove the panel from its tooling and all reference points are still aligned. 

Variations on the basic drilling machine include bench, column, radial arm, gang, multiple spindle, turret and CNC controlled turret. 

Rigidity of drilling machine, workpiece and drill holder and concentricity of drill spindle are important in preventing oversize holes, chatter and poor surface finish. 

It can be seen that all of the basic necessary information is available to conunence selection from the various types of systems that are available. Just as the simple drilling machine produced in 1948 has progressed to a multi-spindle machine with... 

Radial drills are designed to accommodate large work. These machines are arranged so that the spindle can be positioned to drill anywhere within reach of the machine by means of movement provided by the head, the arm, and the rotation of the arm about the column. Some types of radials and portable horizontal machines allow the entire machine to be moved to the workpiece. 

DATA 55 DAT This is the second data input file and should contain information regarding material to be machined, maximum bar size, production rate, maximum spindle speed, number of turning operations, drill diameter, width of parting tool etc. 

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