BullseyeBore Core - Standard Chuck Alignment Guides
The Standard Chuck Alignment Guides are an optional part of the BullseyeBore Core product ecosystem.
A single Standard Chuck Alignment Guide can be screwed onto the back of the BullseyeBore Core device over the label. Standard Chuck Alignment Guides are designed for two purposes:
- First, they provide a means to consistently center BullseyeBore Core onto the flat chuck face during installation. This makes repeated installations onto the drill chuck face both easy and consistent.
- Second, they help to prevent lateral displacement (sliding) of BullseyeBore Core across the flat chuck face. Lateral displacement can occur during initial drill rotation or high-speed rotation, but is most common during electric breaking (e.g., when your finger is removed from the drill trigger and the drill stops suddenly). Some power drills employ a strong electric breaking function that creates an abrupt stop to any drill rotation.
Standard Chuck Alignment Guides are offered in nine different center hole size options of 0.70”, 0.75”, 0.80”, 0.85”, 0.90”, 0.95”, 1.00”, 1.05” and 1.10”. This range of guides provides for the ability to work with a wide array of drill chuck face diameters.
Most standard 0.5” (1/2") keyed or keyless chucks do not require a Chuck Alignment Guide as there is a large enough flat metallic surface to magnetically hold BullseyeBore Core in place during drilling operations without the threat of lateral displacement (sliding across the flat chuck face). However, there are two cases where a Standard Chuck Alignment Guide can be very helpful:
- First, if you plan to repeatedly mount and dismount BullseyeBore Core on your drill chuck, a Standard Chuck Alignment Guide can be helpful. The Standard Chuck Alignment Guide provides a means to consistently center BullseyeBore Core onto the flat chuck face during installation. Mounting BullseyeBore Core on the center of the flat chuck face during installation leads to better balance and rotational stability during drilling operations.
- Second, if you have a drill with a small chuck or a hex shank bit chuck, a Standard Chuck Alignment Guide can be helpful and is recommended. Lateral displacement (sliding slightly across the flat chuck face) can occur with smaller chucks such as standard 0.375” (3/8”) keyed or keyless chucks or standard 0.25” (1/4”) hex shank chucks during drilling or electric breaking.
The use of a Standard Chuck Alignment Guide typically prevents both issues and is recommended. Standard Chuck Alignment Guides are inexpensive, and we always recommended purchasing at least one set to carry and optionally use with BullseyeBore Core.
Standard Chuck Alignment Guides are offered in nine different center hole size options of 0.70”, 0.75”, 0.80”, 0.85”, 0.90”, 0.95”, 1.00”, 1.05” and 1.10”. This range of guides provides for the ability to work with a wide array of drill chuck face diameters.
The best way to choose the correct Standard Chuck Alignment Guide is to first measure the round diameter of your drill’s flat chuck face that BullseyeBore magnetically connects to, and then to select the Standard Chuck Alignment Guide whose center hole diameter is slighter larger than your chuck face. After installation of the Standard Chuck Alignment Guide and mounting onto the drill chuck, BullseyeBore Core should seat flatly and securely against your drill’s flat chuck face, but you should also be able to manually slide BullseyeBore Core very slightly (perhaps 1/10th of an inch or less) from side to side across the chuck face. The most important requirement is for BullseyeBore Core to seat firmly and completely against the chuck face. The Standard Chuck Alignment Guide should NOT interfere with this seating.
Please also note that most standard 0.5” (1/2") keyed or keyless chucks do not require a Standard Chuck Alignment Guide as there is a large enough flat metallic surface to magnetically hold BullseyeBore Core in place during operations without the threat of lateral displacement (sliding across the flat chuck face). The large chuck jaws standard 0.5” (1/2") keyed or keyless chucks typically also extend out of the drill bit hole and provide additional prevention of Lateral displacement (sliding slightly across the flat chuck face).
After you have selected the proper size Standard Chuck Alignment Guide using the instructions above, remove the two screws from the back (label side) of BullseyeBore Core with a Phillips-Head screwdriver. Then overlay and center the proper size Standard Chuck Alignment Guide onto the BullseyeBore Core label and replace the two screws. The Standard Chuck Alignment Guide contain angled fillet screw head slots for the screw heads to fit into so they are flush with the Standard Chuck Alignment Guide after the screws are installed.
Always read and follow the BullseyeBore Core Safety Guidelines before attempting to use BullseyeBore Core or any BullseyeBore Core accessories on a drill or in an actual drilling operation. When using Standard Chuck Alignment Guides, please also ensure that BullseyeBore Core is securely connected to the “face” of the chuck.
