Drawworks · Top drive · Rotary table

Every trip hangs on the bolting.

Bearing cap and brake disc bolts, coupling and mounting bolts, cover screws, pins with retainers and hold-down bolts, made in Houston to your drawings and specifications.

Parts we make · click to see

    Pick a partTap any part in this list to fly to it and read what it does.

    Parts
    Innovation Fasteners · drawworks, top drive and rotary table

    The hoisting and rotating equipment, taken apart to show what we make

    A 2,000 hp AC gear-driven drawworks, a 500 ton AC top drive on its guide dolly and a 37-1/2 inch rotary table, on a piece of rig floor, taken apart the way a rig mechanic works. On the drawworks the guards and covers come off, the brake calipers are drawn clear and the discs unbolted, the couplings are opened, the gearboxes and motors come off the skid, and the bearing caps are lifted so the drum shaft can come out. On the top drive the bail is unpinned, the washpipe, gooseneck, motors and bonnet come off, the pipe handler is unpinned and the guide rail sections are parted. On the rotary table the covers come off and the master bushing and table are lifted. Everything we make is in colour. Press Solid view for a steel model.

    In colour · parts Innovation Fasteners makes

    What's highlighted, and where it goes

    Drawworks

    Bearing cap & pillow block bolts

    Four bolts hold each pillow block cap over the drum shaft bearing, and four more bolt each pillow block to its pedestal on the skid.

    Brake disc to drum bolts

    A ring of bolts fastening each 63 in. brake disc to the spacer ring on its drum flange.

    Caliper & bracket bolts

    Four bolts fasten each brake caliper to its bracket, and four more bolt each bracket down to the skid.

    Drum shaft coupling bolts

    Bolts and nuts through the flanged coupling at each end of the drum shaft, joining it to the gearbox output shaft.

    Gearbox & motor mounting bolts

    Hold-down bolts through the feet of the two gearboxes and the two AC motors into their bases on the skid.

    Guard & cover screws

    Cap screws holding the drum guard, the brake disc guards, the coupling guards and the gearbox inspection covers.

    Skid hold-down bolts & pins

    Bolts through the lugs along the skid runners and pins with retainers at the skid ends, fastening the drawworks to the rig floor.

    Deadline anchor clamp bolts

    Studs and nuts that squeeze the clamp block onto the 1-1/2 in. drilling line at the deadline anchor.

    Top drive

    Bonnet & gear case cover bolts

    The ring of bolts under the bonnet, the row of bolts round the gear case cover and the screws on the side inspection cover.

    Motor mounting bolts

    A ring of bolts through the flange of each drilling motor into the gear case cover.

    Gooseneck flange bolts

    Bolt the gooseneck down on top of the bonnet, over the washpipe and its 3 in. water course.

    IBOP actuator & clamp bolts

    Bolts and nuts closing the two-piece clamps over the connections between the main shaft, the IBOP valves and the saver sub, and the screws holding the IBOP actuator bracket.

    Link & bail pins with retainers

    The two bail pins that carry the top drive, the pins that keep the elevator links on the link adapter and the link tilt cylinder pins, each with its retainer.

    Guide rail pins & bolts

    Connection pins with retainers and splice plate bolts at the guide rail joint, and the pins that tie the bottom of the rail back to the mast.

    Dolly roller bolts

    Axle bolts and nuts through the dolly side plates, each carrying one guide roller.

    Rotary table

    Rotary cover screws

    Cap screws holding the two halves of the cover plate on the rotary housing, and the cover on the pinion shaft bearing.

    Rotary hold-down bolts

    Bolts through the lugs at the corners of the rotary housing into the rotary beams.

    Drawworks, top drive and rotary table bolts, studs and pins, made in Houston. Send us your drawings and material spec.

    Request a quote832-446-3442

    Generic equipment, not any maker's design or any one rig. The drawworks power, drum size, drilling line size and brake disc size, the top drive hoisting rating and water course, and the rotary table opening and overall size follow published data for equipment of these ratings built to API Spec 7K and API Spec 8C. Every shape is illustrative typical proportions, and every bolt and pin count and size is typical. The hook, travelling block, drilling line, elevator and rig floor are shown only as outlines. Your equipment's drawings govern. We manufacture to your drawings and specifications.

    Drawn to the published ratings and principal sizes of 2,000 hp AC drawworks, 500 ton AC top drives and 37-1/2 in. rotary tables built to API Spec 7K and API Spec 8C.

    © 2026 Innovation Fasteners. This interactive drawing, its 3D models and its code may not be copied, hosted elsewhere, scraped or used to train AI models. Terms of use.