Oil Well Drilling Rig Spare Parts API 4f Crown Block

Product DescriptionBOBAN Crown Block consists of crown basement, fast-line sheave, dead-line sheave, main sheave, sand-line sheave, drilling line protector and sheaves for hydraulic and air winch, bumper wood for the Crown-O-Matic and guardrail. It's designed with closed type and open type. The traveling system is divided into 7×6, 6×5, 5×4, and 4×3, which fit to Φ7/8"~Φ1 1/2" drilling lines. The sheave groove conforms to the requirements of API RP 9B. The sheave groove surface is processed with a quenching treatment. The bearing adopts centralized lubrication for convenient operation.  Features and Benefits* The drilling line is reeved in parallel.* The crown frame is made of high strength steel shapes & plates. The lug plate for top drive is provided. The crown block is equipped with metal base plate, handrail, and toeboard. A ladder has an opening.* A deviation fast-line sheave.* The sheave cluster is titled to counteract traveling block's torque. The side plate assembly is faced with derrickman for ease of picking off & suspending elevators.* The sheave grooves are intermediate frequency quenched so as to improve surface hardness and extend service life of sheaves.* All sheaves have double-row conical roller bearings and each bearing has individual lubricating channel.* The rope guard prevents the wire rope from running out of the sheave grooves.* Equipped with wooden bumper blocks and retainer net.* Equipped with a gain hole for use in repairing the sheaves cluster.* Equipped with sand line sheaves and auxiliary sheaves.* The sheaves and the bearings are interchangeable with those of matching travelling block.* The crown blocks conform to API 4F 8A/8C.  Product ParametersModelTravelling systemDrilling line diameter (in)Load (lbf)Main sheave diameter (in)Fastline sheave diameter (in)Sandline sheave diameter (in)Overall Dimension(ft)Self-weight(lb)TC603×27/813488519.6819.68   5.37×4.36×4.891305TC704×37/815736624.0224.02   4.86×2.05×2.071598TC90C4×3120232824.0224.02   4.46×3.28×4.11764TC1354×3130349229.9236.02   6×4.95×4.272866TC1585×41;1 1/835519829.9236.0219.687.64×4.69×4.823263TC1586×51;1 1/835519829.9236.0219.687.64×5.38×4.823472*TC1604×31 1/835969436.0236.0219.682.23×3.23×3.414393*TC170C5×41 1/438217536.0244.0915.757.97×3.28×4.436095*TC180D6×51 1/440465636.0236.02   8.14×2.7×3.184574*TC2256×51 1/450582044.0950   8.14×2.7×3.1812306TC2256×51 1/450582036.0236.0219.686.56×4.59×4.435158*TC3157×61 3/870814850603012.84×10×9.2419294*TC4507×61 1/2111640606029.9211.38×10×9.821459Note: * Marked items for the mast of skid-mounted drilling rig.  /* March 10, 2023 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1