![]() ![]() The 16oz plum bob can be used to set surveying instrument. This type plumb bob is used when extreme accuracy is not required. Omnis plum bobs are built out of solid brass and are manufactured to be perfectly balanced. Cord for the solid steel bobs must be obtained from a separate source. CR Kennedy is your national partner for all positioning needs from survey to machine control to building construction and everything in-between. It may be round or hexagonal in shape and it comes in 3, 8, and 12 ounce sizes. ![]() It may have just a remov- able head (B), or a removable head and a replaceable point (C). SOLID STEEL The solid steel plumb bob (A) may have a machined integral head, body, and point. The heavier plumb bobs are better for use in windy areas. A plumb bob is suspended from the lower arm. It comes in 6, 8, 10, and 16 ounce sizes. While levels might be better for horizontal alignment, they require. S-Tech Plumb Bob Target, red/white, 5cm x 10cm, notched. The surveyors brass plumb bob comes with a minimum of 7 feet of nylon, silk or linen cord. Both a level or surveying plumb bob can be used for aligning components on the jobsite. Spatial Technologies is an online surveying equipment store providing construction surveyors. The adjustable cap allows the operator to make minor cor- rections to height and rotation to make sure the bob hangs straight. Both types have replaceable steel points for increased accuracy. SURVEYOR'S POLISHED BRASS The surveyors brass plumb bob may be either a spool type (A) or an adjustable cap type (B). Plumb bobs are used by carpenters, surveyors and mainte- nance technicians. Contact us for details.TM 9-243 TYPES AND USES PLUMB BOBS A plumb bob is a precision instrument used to establish a true vertical transfer and line-up reference point, and to take readings or soundings in tanks and voids. SitePro 15-1021GR18KIT 18oz Plumb Bob / 12 Gammon Reel Contractor Kit. Projecting from This is an iron plumb bob and matching tripod with removable legs. Land Surveying Equipment & Supplies including Robotic Total Stations, Theodolites. Inspect Drop Line and Plumb Bob for damage prior to use.Ĭustom weight Plumb Bobs up to 12lbs are available by special order. Use a high quality plumb bob from Grainger to help make sure structural walls and doorjambs are vertical, to line up points when surveying and for many. The body of the plumb bob, which is coated in black enamel, is conical in shape. Remove point and store under cap when not in use. Born in 1844 in Ashland County, Ohio, he developed a keen fascination with the land. The plumb bob is used to ensure that the chain is perfectly vertical or plumb when taking measurements. Robert Harvey’s fascination and study of surveying techniques began at an early age. An optical plummet on the tribrach allows the surveyor to view the tribrach’s center and place its cross-hairs precisely over the survey marker nail on the stake. The tribrach features a level bubble and leveling screws to adjust the tripod’s level as necessary. Wear appropriate protective gear when handling. The plumb bob is a tool used by surveyors in chain surveying, which is a method of land survey that involves the use of a physical chain or tape measure to measure both distance and angles. A level instrument is a key to successful surveys. Free falling plumb bob can cause bodily injury and death. NOTE: Never deploy the Plumb Bob over the heads of others. Roll it up neatly on one of our reels for easy dispensing next time. Wire is preferred over string for minimum stretch and maximum strength. Aala Survey Drawing Instruments Plumb Bob Tool Instruments for Leveling Wall/Carpenter Work, 350 Gram Weight, Silver 4.4 (12) 546560 (3 off) Get it Saturday, 11 March - Sunday, 12 March Only 1 left in stock. Removable cap allows connection to your drop line and safely stores the point when not in use.ĭon’t forget the drop line! We offer high tensile strength steel wire and reels to deploy your plumb bob. Adjustable point is double sided for maximum value and hardened for maximum service life. Our unique adjustable point allows the user to set the desired distance between the point and surface without readjusting the drop line. Heavy weight plumb bob sways less than light weight plumb bobs over longer distances.Īll plumb bobs will start to sway after some time. Specifically designed for unique applications like elevator shafts, steel erection and tower leveling our heavy plumb bobs are “straight up” the best! A plumb-bob or a plummet is a weight with a pointed tip on the bottom that is suspended from a string and used as a vertical reference line. Our precision machined large brass plumb bobs are made in the USA to our specifications. ![]()
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