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75233 Dorma Pivot Set

75233 Dorma

75233 Dorma Pivot Set

Manufacturer: Dorma
Price: $365.30
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400 Series Door Closer Availability: IN STOCK. Next day shipping.
Dorma door Closers
Dorma Pivot Set
75233 3/4" Offset Intermediate Pivot, Single Acting
  • Wood, Steel or aluminum Door And frames (up to 3 hour fire rated door)
  • Max. door width: 4'- 0"
  • Max. door weight:: 750 LB
  • DORMA pivots support door weight effectively in a variety of applications. Like all DORMA products, our pivots are available in an array of finishes to enhance and complement surrounding decor.
  • DORMA’s LM Series of pivots using brass and steel are designed for long life and trouble-free operation. Each pivot and pivot set meets DORMA’s exacting specifications for support of rated and non-rated high-traffic interior and exterior openings, extra-heavy doors, or lead-lined doors.
  • Pivots for 20 minute and 3 hour fire-rated doors comply with applicable codes.DORMA pivots span a wide variety of styles and applications that can interface with other DORMA products on wood, aluminum, or hollow metal doors and frames.
  • They can also be used on doors of special design such as paneled doors, and doors of unusual weight, thickness, or material.
  • Pivots and pivot sets, durable and long lasting, accommodate doors weighing up to 1000 lb.
  • Pivot sets are available for center hung, 3/4" offset, and 1-1/2" offset.
  • Components are offered for center hung, 3/4" offset, 1-1/2" offset, and pocket pivot applications.
  • Floor bearings with numerous spindle heights are available to accommodate an array of bottom door clearances.
  • Floor bearings are surface applied or grouted into the floor, depending on which pivot set/floor bearing is used.
  • Heavy-duty versions are available for doors up to 1000 lb.
  • Center hung pivots and pivot sets can be singleacting (must use an applied stop) or double-acting.
Technical Instruction

1. No. 75133 Top Pivot
2. No. 75323 Bottom Pivot
3. No. 7471HD Floor Bearing
4. No. 75233 Intermediate Pivot (optional)

  • The DORMA LM Series is listed by U.L. and C.U.L. under their continuing reinspection programs.
  • The LM Series is certified to the requirements of ANSI A156.4.
  • DORMA’s LM Pivot Series produced from brass or steel for interior and exterior non-rated and fire-rated doors.
  • Top pivots and bottom arms will be center hung, 3/4" or 1-1/2" offset.
  • Intermediate pivots will be 3/4" or 1-1/2" offset. Side jamb bottom pivot will be 3/4" offset.
  • Top and intermediate pivots will be full mortise configurations.
  • Bottom arms and side jamb pivot will be mortised.
  • Pivots can be substituted within a pivot set, assuming the offset is the same.
  • Offset 3/4" and 1-1/2" top pivots are available for doors that are inset 1/8" from the frame face while standard intermediate and bottom arms are templated accordingly.
  • Center hung pivots will accommodate double-acting and single-acting doors.
  • Center hung single-acting will use an applied stop.
  • Pocket pivots will accommodate doors opening 90º that must be flush with an adjacent wall.
  • All pivots and pivot sets will incorporate needle bearings and lubricated hardened steel pivot pins treated to prevent corrosion.
  • All pivots and pivot sets will be available in a variety of finishes.

Plated Finishes:

  • Primed for Painting: 600.
  • Brass: 605 (Bright) or 606 (Satin).
  • Bronze: 611 (Bright), 612 (Satin), or 613 (Oxidized Satin Oil Rubbed).
  • Nickel: 618 (Bright) or 619 (Satin).
  • Chrome: 625 (Bright) or 626 (Satin).

Sprayed Finishes:

  • Aluminum: 689.
  • Bronze: 691 (Dull), 690 (Statuary), or 695 (Dark Duranodic).
  • Gold: 696.
  • Black: 693.

Optional Special Color Sprayed Finishes:

  • Specify code number or submit 3 color chip samples.


  • 5 Years.
ANSI Conversion Chart
ANSI Number
ANSI Requirement/Function
DORMA Pivot Sets
DORMA Pivots
CO7011 Center Pivoted, 1000 lb Door max. CP1000
CO7021 Center Pivoted, 250 lb Door max. CP660
CO7032 Center Pivoted, 150 lb Door max. CP440, CPA440
CO7121 Offset Pivoted, 250 lb Door max. OPH750, OP1550
CO7131 Offset Pivoted, Side Jamb Bottom Pivot, 250 lb Door max OPJ350
CO7162 Offset Pivoted, 150 lb Door max. OP440, OPL440, OP15200
CO7172 Offset Pivoted, Side Jamb Bottom Pivot, 150 lb Door max. OPJ350
CO7202 Offset Pivoted, Labeled Fire Doors, 150 lb Door max. OPF440, OPLF440, OPF15200
CO7311 Offset Pivoted, Lead-Lined Intermediate Pivot 75240
CO7321 Offset Pivoted, Intermediate Pivot 75220, 15220
CO7371 Offset Pivoted, Intermediate Pivot, Labeled Fire Doors 75233, 15233
CO7382 Offset Pivoted, Full Mortise Intermediate Pivot (light-duty) 75210
Technical Details

  • Pivots standard design includes needle bearings with hardened pins for durability and long life.
  • 3/4" and 1-1/2" offset versions available for flush and 1/8" inset door and frame conditions. Flush versions are standard.
  • Pivot sets are available for non-rated, 20 minute rated, and up to 3 hour fire-rated application.
  • Intermediate pivots are recommended with offset pivot sets.
  • Pivot sets available for lead-lined doors weighing up to 800 lb. Can also be used on non lead-lined doors.
  • Lead-lined door pivots available for varying door thicknesses. The hole pattern in the pivots is staggered to straddle the lead in the center of the door.
  • Pocket pivots available for 90º pocket door applications that require the door to be flush with an adjacent wall.
  • Pivots and pivot sets furnished standard with all machine screws. Half or all wood screw options available.
Center Hung - Single or Double Acting
3/4" Offset Hung - Single Acting
1 - 1/2" Offset Hung - Single Acting
90º Pocket Pivot Hung
Pivot Set Selection Chart
Pivot Set
Maximum Door Width
Maximum Door Weight
Fire Rated
Center Hung Double-Acting
Offset Hung Single-Acting
OP440 3/4" offset standard
4' - 0"
440 lb
OPF440 3/4" offset, up to 3 hour fire rated
4' - 0"
440 lb
OPJ350 3/4" offset side jamb
4' - 0"
350 lb
OPH750 3/4" offset heavy-duty
4' - 0"
750 lb
3/4" offset heavy-duty , up to 3 hour fire rated
4' - 0"
750 lb
OPL440 3/4" offset lead-lined
4' - 0"
440 lb
OPL800 3/4" offset lead-lined
4' - 0"
800 lb
OP15200 1-1/2" Offset
3' - 6"
200 lb
OP15500 1-1/2" offset heavy-duty
4' - 0"
500 lb
OPF15200 1-1/2 offset, up to 3 hour fire rated
3' - 6"
200 lb
OPF15500 1-1/2" offset heavy-duty, up to 3 hour fire rated
4' - 0"
500 lb
CP440 Center Hung, Wood or Steel door
4' - 0"
440 lb
CPA440 center hung, aluminum door
4' - 0"
440 lb
CP660 center hung medium -duty, wood or steel door
4' - 0"
660 lb
CP1000 center hung heav -duty , wood or steel door
6' - 0"
1000 lb
Questions and Answers
Q: Hello, I've seen your videos on YouTube on pivot hinges and thought you guys would have the experience and knowledge to answer my questions and supply me with the hinges I need.

I have an upcoming project which requires a "concealed" door leading to a closet.

The door: 18" x 80" x 1 3/4" thick solid core door, weighing approximately 50 lbs.

The jamb will be 1x poplar material, but can be unsized to 5/4 if needed. Flooring is oak.

The door will swing out into the room. The door will have a piece of baseboard, 3/4" thick, attached to it with bevel cuts on the end to blend into the baseboard on either side of the door when closed.

The door will have no casing. 5/8" drywall will be butted up to the jamb with a z-molding, leaving a 1/4"gap between jamb and drywall.

I'm hoping that you have something in mind that can accomplish what I'd like to do, as well as have enough throw to it that the baseboard does not stick. Obviously, the hardware can not show, as closed the door is supposed to be "invisible". Thank you, Gary B. [removed]

A: Will the drywall butt to the backside of the jamb creating a shadow line or will the drywall run flush to the face of the cased opening frame? If flush to the face, the presence of the drywall will preclude using Soss hinges as the templating as seen here will not suffer the inclusion of the drywall:

Download File

Leading us to the posibility of using a center hung pivot as seen here:

Download File

The issue will be note #3 and the requirement to radius the heel edge of the door. Applying a bullnose to the heel edge will allow you a .125" gap between the frame and the door stile but this treatment will complicate the application of baseboard at the bottom of the door.

The leads me to the Hager 510 Rescue Pivot Set seen very commonly in bathroom doors in hospital rooms:

The Hager 510 is for use with Square edge door, 1/8” gap on both hinge and lock stiles. This hardware operates on a "rack" type principle where the door moves into the opening laterally when the door is opened. This hardware is concealed and allow you to sidestep the bullnose treatment on the pull side on the pivot stile.

The penultimate question becomes, will the "rack" - Camtrol movement accommodate the 3/4" applied baseboard. While I do not have a cad drawing or a video showing the position of the door at 90°, I am very tempted to say it will work. Shall I investigate this matter further.

Additional documents are available for your review here:

Installation Instructions:
Download File

Download File

Cut Sheet:
Download File

Is there a follow up question that we can perhaps attempt to answer? We take deep pride in our technical expertise, as we know it separates us from our competition, so don't hesitate to ask.

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if we can assist you by answering further questions or with entering this order and please let us know if there is anything else we can help with.

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