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Our High Carbon Steel Drill & Tap Kit for 8mm Screws is used to create internal threading of stainless steel newel posts and railing. A tap cuts threads on the inside of a hole, to accept a 5mm machine screw or bolt. These drill and tap combination produce a very strong and reliable thread.
Includes: (1) drill bit and (1) 8mm tap
Thread: 8mm - 1.25mm Plug Tap
Drill Point: Cobalt -135° Split
Tap Material: High Speed Steel
HSS drill bits ensure fast, precise drilling
High carbon steel plug taps are ideal for general purpose threading
Steps:
Mark holes.
Secure the workpiece firmly.
Drill the hole to the correct diameter and depth.
Apply an appropriate lubricant such as oil, WD-40.
Hold the tap in line with the hole and turn it clockwise. Try to keep it very straight as you turn, this is important. You may feel the material breaking.
Every few turns, back the tap out (counterclockwise/anticlockwise) to clear away chips of loose material.
When the tap has reached the required depth, back it out, clean out chips and any cutting fluid or lubricant, and try your screw or bolt in it.
Tips:
Tapping operations create chips. Mask or cover any parts of your workpiece or surroundings that would be damaged by chips, or plan to clean them off when you are done.
Small taps are extremely easy to snap. It takes about 4 pounds of force to break a 5mm-8mm tap, so be very careful using small taps.
For very thin material, it may be better to use a nut on the other side. Other options include press-in nuts designed for sheet metal and threaded inserts for softer materials, such as plastics. A good rule of thumb for metals is that at least three full threads should be in the material.
Take care not to change the angle of the tap, especially at the beginning. You only want to cut one thread.
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Refund Policy
We want you to be completely happy with your purchases. So we do everything we can to assure you get the exact merchandise you order, delivered on time. If for any reason you are not satisfied with your order, we will be happy to accept returns within 30 days under the following guidelines.
Returned merchandise must be in unused condition and in its original packaging. There is a 20% re-stocking fee on all returned items and shipping charges are not refundable. All returns require a return authorization from us (RMA#). Before you return an item please call us or send us an email stating your reason for a return. Special order items are not returnable. All unauthorized returns will not be accepted. Items used in any way will not be accepted for return or exchange.
IMPORTANT:The buyer is responsible for shipping charges and insurance on any products returned for a refund.
