A drill bit size hole card can be very helpful for this. Select a very sharp drill bit at least twice the size of the molly's screw. XSR - Extra Short Reach, SR - Short Reach, LR - Long Reach, XLR - Extra Long Reach. Sleeve anchors require a hole that is the same diameter as the anchor being installed. Push the anchor into the hole and tap it lightly with a hammer until it fits snugly and its end is flush with the wall. If it's too small, the anchor won't fit, and if the hole is too large, it won't hold. In hollow walls these are driven into a pre-drilled hole and crimped by turning the included screw. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. Generally with drywall, the anchor is a little bigger than the hole, and you just force it in and it works fine. Step 3 - … Toggle bolt anchors are some of the strongest anchors you can use. Outward stress can pull it out of the hole. Get a Hammer Drill. Plastic wing anchors don't have bolts attached to them. Conical anchors made from lead can hold more weight than plastic ones and are the better choice for supporting weight on concrete walls. Then use a manual or … Drive a screw into the anchor and it will expand and wedge against the sides of the hole. 325 lbs. How to Remove Inserts for Screws in Drywall, How to Install a Grab Bar in an Existing Shower, How to Install a Screw Eye Into a Plaster Wall, Home Addition Plus: Installing Wall Anchors, How to Install a Butterfly Drywall Anchor. Molly bolts and toggle bolt sleeves have barbs under the front lip that dig into the drywall to hold the sleeve in place. Drill a through and through hole into the drywall using either an electric or hand drill with a bit size slightly smaller than the diameter of the molly bolt you have. Expansion Wall Anchors. If the diameter of the anchor is displayed on the packaging, drill the hole with a bit … If this is not something you think will work for you, another option is to look for the size etching at the base of the shank. ing drill tolerances to anchor dimensions. Drill the hole to the specified embedment depth plus minimum hole depth overall (see table below) to allow the thread tapping dust to settle, and blow it clean using compressed air. The package will indicate the proper size drill bit to use. Whether you're using a plastic wall anchor, a molly bolt or any other type of wall anchor, you'll need to drill a hole in the wall, and the size of the hole is critical to the proper functioning of the anchor. Some packages of anchors even have the correct drill bit included with the packaging. 2. Pushing the assemblage through the wall and turning the screw opens the butterfly catch. In other words, use a 5.0 mm drill bit for a yellow plug, a 6.0 mm drill bit for a red plug, a 7.0 mm drill bit for a brown plug, or a 10.0 mm drill bit for a blue plug. The best way to drill a hole into concrete, concrete block, mortar and brick is to use a hammer drill. You can also size drill bits by pushing them through holes. Installation instructions: Required Tools: Drill, Appropriate Drill Bit, Hammer ANCHOR SIZE 3/16 x 7/8" 1/4 x 3/4" 1/4x 1" 1/4 x 1-1/4" 1-1/2" 1/4 x 2" MINIMUM EMBEDMENT 1-3/8" 1-7/8" 4.000 PSI CONCRETE 125 lbs. A plastic anchor with a wide flange on one end requires a drill bit the same width as the narrow portion of the anchor to create a pilot hole. In case you need to drill a hole and thread it for a screw or bolt. Fastenal Part No. 1-1/4" - 1-3/4". 5/8" - 1-3/16". Unscrew the bolt from the sleeve of a molly bolt or toggle bolt. For reference, I grabbed a caliper and started measuring things. Your drill bit should nearly mirror the diameter of the anchor, but try to keep it a tad smaller. Most drill bits nowadays have diameters of between 1 mm and 20 mm. Shop for Hollow Wall Anchors. © Copyright 2020 Hearst Communications, Inc. Use the same size drill bit as the diameter of the bolt. Measure the diameter of a conical wall anchor approximately 1/4 inch away from the opening with an accurate ruler and choose a drill bit of that diameter to drill the hole for it. © Copyright 2020 Hearst Communications, Inc. Apart from that, there's no challenge to inserting a wall anchor, as long as you use one that will support the weight you plan to put on it. The drill bit you use should be the same size or only slightly larger than the wall anchor. 260 lbs. To get the right-size hole, measure the shank of the drill bit against the front of the anchor-- its diameter should be the same size or 1/16 inch more than that to make the opening for the screw. The drill bit you use should match the center of the drywall anchor. If you drilled the right size hole, you won't be able to get it all the way in without tapping it with a hammer. She enjoys exploring foreign locales and hiking off the beaten path stateside, snapping pics of wildlife and nature instead of selfies. In the event that you encounter both exceptions listed above, go up two drill bit sizes. 1/4". Use a conventional drill bit to drill into drywall and a masonry bit to drill into concrete or masonry. LR. The packaging that the drywall anchors came in should list the drill bit size required to make the pilot holes. The reason for this product’s popularity is the lip on the outside of the anchor. A standard drill will do OK in soft brick and mortar, but it’ll just frustrate you and burn out bits … Landscape builder, he helped establish two gardening companies the most weight while conical anchors from... 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