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75233 Dorma Pivot Set
 

75233 Dorma

75233 Dorma Pivot Set

 
Manufacturer: Dorma
Price: $406.09
 
 
 
 
 
 
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Dorma Pivot Set
75233 3/4" Offset Intermediate Pivot, Single Acting
APPLICATION
  • Wood, Steel or aluminum Door And frames (up to 3 hour fire rated door)
  • Max. door width: 4'- 0"
  • Max. door weight:: 750 LB
OVERVIEW
  • 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)

CERTIFICATION
  • 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.
specification
  • 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.
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.

Warranty:

  • 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
Aplication
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
.
.
OPHF750
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

Template:
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.

Please reply to this email or contact our sales department here:

Click Here

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.

Q: Hello- First, you have an amazing website, very informative! And it seems you are extremely kind and helpful in providing direction on what type of hardware is needed so here I am. I'm looking for assistance for a pivot hinge for my built-in cabinetry. I've attached a pdf of sketched- plan view of the front of door and back of door for your reference as seen here:

Download File

as well as imagery as seen here:

View Image

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of the cabinetry installed to date. I'd like to use a pivot hinge to create a single door swing built into my cabinetry- out or in swing can work. In the past I've used Stanley 340 pivot hinges but I'm finding the way the cabinetry was built my original design will not work. Ideally I'd like all the weight to be supported in the floor pivot hinge and secondary support in the cabinet above. The cabinet above is empty so I can add additional blocking inside if needed. I've done a lot of research on your site though I'm hoping to get some further direction on which hinge can work for this type of installation. The plan is to mount (2) cabinet door panels onto a single panel back door finishing with a toe kick at the bottom. I can still tweak the design of the single panel backer door. The only thing that cannot be changed is (2) cabinet door panels as they mirror cabinets at the end of the built in wall. *All panels are 3/4" thick 31 7/8" space from filler to till for door to go into *Cabinetry is full overlay 31 3/4" x 83 7/8" - Back Panel @ 61 lbs 15 13/16 x 79 1/4" (2) Cabinet door panels @ 18lb/each (to be mounted on back panel 31 3/4 x 3" +/- I'm running into the issue of the finding hardware that will carry the weight of the panels. I'm also finding that since the main back panel is only 3/4" thick I "might" have a problem mounting it onto the floor pivot. I'm hopeful I can screw the floor pivot into the center of the 3/4" panel, aesthetically it's fine if it's sticking out slightly from below. The front I figure I'm fine with since I have the (2) cabinet door panels mounted. I also need to make sure I clear the open, so this is where I'm questioning do I need 3/4" or 1.5" offset pivot hinge. Options I thought would work: Rixon 128 3/4 - All rixon hinges seem to be out of the question because per hardware specs all doors need to be beveled, correct me if I'm wrong. ABH 0173 Floor pivot states "Floor stud into concrete" - will this not work installed into hardwood? Deltana PH60 -maybe? Stanley 340- The heavy weight option needs to mount into the wall, I have a filler but no blocking here, unless you can recommend a way to tweak this. THANK YOU in advance for your time. Please feel free to call to discuss, I figured it was best to kick off with sending my details in for you to review. I can follow with a call as well if you can kindly direct me to a name & phone number to contact.

A: Increase your back panel thickness to 1-1/2” thick, band that back panel with hardwood lumber at the top and bottom so that when you mortise the pivot hardware to it you have something substantial to screw into, use the 0147 x 1-1/2 as seen in the Cut Sheet here:

Download File

and the Template here:

Download File

and position the installation as seen here:

Download File

and can be purchased here:

Click Here

The additional 3/4” back panel thickness allows you to get the commercial hardware installed as 3/4” is insufficient in thickness. The 1-1/2” offset also allows it to act as a normal 3/4 inch offset because you're adding that decorative panels of the face of your backer.

I would also consider additional hardware such as the Rockwood 593-626 Roller Latch with Angle Stop - Satin Chrome Plated Brass that incorporates a stop as seen here:

Click Here

I'm more than happy to help you with the carpentry, woodworking & mortising that would be required on this project as well.

Q: Richard, Thanks for the follow up. I think I understand your direction. Are you suggesting to do (2) 3/4" panels back to back with and the piece at the bottom and top are the bands? I've attached another sketch for you to look at as seen here:

Download File

If the sketch is correct, do you recommend a minimum height the band should be? I am meeting my cabinet guy on Monday to finalize the pieces that need to be made. I was also researching solid core doors that I could use for the back panel to achieve the 1 1/2" thick backer board but am coming up unsuccessful for "instock" items. Thanks again for your help-

A: Your sketch is exactly what I am suggesting. Doing so will give you adequate thickness to mount the pivot hardware to. I suggest the top and bottom hardwaood to be 1-1/2" thick. You might also band the vertical stiles with 3/4" thick hardwood for a finished edge.

Regarding your door search, we keep in stock 1-3/4" solid core doors and can re-rail and re-stile them to your required size. Though you might want to consider using a hollow core wood door, though there would be a lead time.

What can I do to assist you in this neat project at this time?

Q: Is CH-100 a valid part number for a Dorma Bottom Pivot?
A: While there is a source online that is listing a Dorma Center Hung Commercial Door Bottom Pivot and calling it the CH-100 as seen in the following images:

View Image

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and is described as:

This Bottom Center Hung Door Pivot is manufactured by Dorma. It's an adjustable end load floor pivot set for bottom door rail channel depth of 7/8". Bottom door clearance is adjustable from 3/8" to 5/8". Maximum weight capacity 200 Lbs.

After further research I believe the CH-100 is actually the Dorma 8852 bottom pivot as seen here:

Download File

and here:

View Image

and can be purchased here:

Click Here

Alternate products, though not exactly the same, I might would recommend the following two options as potential alternates.

The International Closers 3010-DP Adjustable Dual Purpose Bottom Pivot Set as seen here:

Click Here

or the International Closers 3010-G Adjustable Floor Mount Bottom Pivot Set as seen here:

Click Here

(Required, used to email you once question is answered.)
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