Style H Paper Drill Bits

Style H premium hollow bits are offered in common diameters such as 1/4 inch, 5/16 inch, and 3/8 inch. The correct choice depends on the post, ring, fastener, or filing system used after drilling. Select a hole that gives the hardware enough clearance without weakening the document edge. For an established job, match the diameter recorded in the production specification or measure a correctly finished sample. For a new job, test the intended hardware through scrap pieces that include the same paper, tabs, covers, and laminated materials. This trial reveals whether the hole is too tight or unnecessarily large before a full stack is drilled. Keep all spindle positions consistent when the finished pattern requires matching holes.

The 2 1/2-inch length is part of the bit specification and must suit the machine and its drilling setup. It does not mean every material stack should be drilled at that full depth. Actual stack height depends on the drill rating, stock type, sharpness, chip clearance, and the quality required on the finished hole. The relevant Spinnit paper drills have their own capacities and operating instructions, which should govern the job. Thick coated sheets and laminated covers can create more friction than plain paper, so a reduced stack may be necessary. Use a controlled test run and confirm that chips clear freely, holes remain aligned, and the machine does not require excessive pressure.

Use a sharp bit, keep the hollow centre clear, apply only suitable drill lubricant, and avoid an oversized stack. Heat rises when a dull edge rubs instead of cutting or when packed chips prevent material from moving through the bit. Pause the machine and use the proper chip-clearing tool if waste stops moving freely. Do not touch the bit immediately after a demanding run, and never clear it while the equipment is operating. Coated paper, laminated stock, and heavy covers may need shorter runs or smaller stacks. A clean drill block also supports the exit side and helps the bit complete the cut without tearing. Regular inspection is more effective than increasing feed pressure when performance begins to decline.

A practical setup should include spare Style H bits in the required diameters, a sound drill block or strip, a chip clearer, suitable wax or lubricant, and an approved sharpening tool. Each item addresses a different cause of poor drilling. The block supports the underside, the clearer removes compacted waste, lubricant controls friction, and sharpening restores the cutting edge when the bit is still serviceable. Relevant paper drill accessories should be matched to the drill model rather than chosen only by general description. Store spare bits where their edges cannot strike other tools. Keeping these supplies beside the equipment also makes it easier to correct a problem before damaged holes affect an entire run.