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Schlage Orbit F51A-ORB

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Schlage Orbit F51A-ORB
Schlage Orbit Keyed Door Knob

Helpful Information

Fits Standard Door Preparation Door Hardware Preparation
- 2 1/4" tall standard strike
- Shipped with rounded corner removable faceplate and adjustable backset drive in latch.


Schlage Orbit Door Knob Specifications

The Schlage Orbit door knob is a classic round sphere shape that works in all types of design styles. The basic ball shape feels good in your hand, and the simple design of this doorknob is timeless. Schlage has designed the Orbit door knob with a versatile design that will fit multiple types of door preparation from a drive in latch to latches with faceplates. The Orbit door knobs are also very easy to install and a great choice as a dependable, brand name lock. The Schlage Orbit knob is available in 8 finishes and 4 functions.

- Adjusts to fit all standard door preparations
- Easy installation- One-person project; no extra hands needed
- Quality materials and construction for exceptional security
- Lifetime finish and mechanical guarantee
- Quality finishes coordinate with plumbing and lighting
- Comes with rounded corner strike and mortise plates, square are available upon request
- Adjustable Backset - 2 3/8" - 2 3/4"
- Fits standard door thickness of 1 3/8" - 1 3/4"

Be sure to order your Schlage Deadbolts
too so we can key them alike.

Schlage Bright Brass Orbit Knob Schlage Oil Rubbed Bronze Orbit Knob Schlage Satin Chrome Orbit Knob Schlage Matte Black Orbit Knob
Bright Brass Oil Rubbed Bronze Satin Chrome Antique Brass
Schlage Bright Chrome Orbit Knob Schlage Satin Nickel Orbit Knob Schlage Antique Pewter Orbit Knob
Bright Chrome Satin Nickel Antique Pewter
What You Should Know About the Schlage Orbit Knob:

Note: Schlage entrance locks have a turn button on the inside and are designed to stay locked unless turn button lock is disengaged by the user. Schlage privacy locks have a push button lock on the interior which is disengaged when the knob or lever is turned from the inside.

Finish Note: Oil Rubbed Bronze and Aged Bronze are quite similar. We are noticing more people prefer the Aged Bronze because it has more of a glossy finish with a rubbed look. The Oil Rubbed Bronze is more of a solid matte brown color.

schlage-orbit F51-orb installation
schlage-orbit F51-orb template

In the Box

Whats Included in Your Schlage Orbit Knob

Passage Door Knob Contents
A knob for both sides of the door, latch mechanism, strike plates and mounting screws.

Privacy Door Knob Contents
Knobs for both sides of the door, latch mechanism, generic unlocking tool, strike plates and mounting screws.

Keyed Entrance Door Knob Contents
Knobs for both sides of the door, latch mechanism, keys, strike plates and mounting screws. If you have several keyed locks keyed alike, there may not be a key for every lock shipped.

Single Dummy Doorknob
A single non functioning knob and mounting screw

Choose Options:


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Generally Ships in 1 Business Day

Order Help

Schlage Door Knob Functions

Schlage F51 Entrance Knob Function F51 Entrance. The F1 entrance function is the most popular type of entrance lock. This lock is unlocked by key on the outside or thumbturn on the inside. The inside knob is always unlocked, so you can exit the house without unlocking the knob. This lock function is considered safer because you can exit the house quickly by just turning the knob.
Schlage F54 Entrance function F54 Entrance. This entrance function is also keyed on the outside and thumbturn on the inside, but when the knobset is locked, the inside knob will not turn. The knob has to be unlocked before you can exit the house. Some people prefer this lock function because its hard to lock yourself out of the house since the lock has to be unlocked to leave.
Schlage Storeroom Knob Function F80 Storeroom. A storeroom lock is typically used on an outside storage closet or storage room. This lock has a fixed knob on the exterior and always remains locked. The only way to unlock the door is with a key. The inside knob has no thumbturn and always remains unlocked.
Schlage passage knob function F10 Passage knob sets do not lock. They are generally used for hall or closet doors where a lock is not required. Sometimes passage knobs are used along with a deadbolt for a locking door. Passage knobs are suitable for interior or exterior use
Schlage F40 Privacy knob function

F40 Privacy door knobs are generally used on bedrooms and bathrooms. Privacy knobs lock, but it is not a keyed security lock. Schlage privacy knobs can be locked from the inside with a turn button in the knob. Can be unlocked from the outside with a generic unlocking tool.

Schlage F170 Dummy knob Function

F170 Dummy door knobs are just one knob that mounts to the door with a mounting bracket. To use a dummy knob your door must not have the 2-1/8" hole drilled as you would for a regular knob set. Dummy knobs are the perfect solution for ball catch doors or other applications where a latch is not needed, but the look of a doorknob is desired.

All lock functions include all the needed mounting hardware. Entrance, passage and privacy knob sets are full sets and include knobs for both sides of the door, latch, 3-way faceplate, strikeplate and mounting screws

Dummy knobs are sold as single knob with rosette and mounting bracket with screws. No latch, strike, or faceplates are included with the dummy function.

Passage, Privacy, and Dummy knobs are non-keyed


Schlage extends a lifetime limited mechanical and finish warranty and a one-year limited electronics warranty to the original consumer user (Original User) of our Schlage brand product (Product) against defects in material and workmanship, as long as the Original User occupies the residential premises upon which the Product was originally installed. See complete Schlage Warranty.

Schlage door knobs can be returned within 60 days of purchase. Before returning you must obtain a return authorization number so that we can get your credit properly issued. There is a 15% restocking fee on all returned Schlage hardware. Please see our returns page for more details.

Be sure to check out other Schlage Door Hardware Products:


Schlage Orbit Door Knob Measurements

Schlage Orbit Door Knob Specifications

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Customer Reviews

5 Stars
Great Service.
The door locks are fine. I received a bad screw with one lock. Anyone who has bought a box of screws knows how often that happens. What matters is the service to take care of my problem that you provided. It was perfect, one phone call to let you know and the parts were on the way. No problems at all. Finding a place to buy door locks is easy, but good service is very hard to find. I'm a licensed California contractor for over 40 years and a California licensed public works building inspector for 18 years. As the chief inspector on multimillion dollar projects I can tell you service is everything.
Did you find this helpful? 
Reviewed by:  from CA. on 1/15/2021
5 Stars
Product came in a timely manner and fit perfectly, would order again.
Did you find this helpful? 
Reviewed by:  from Hatboro. on 5/25/2018
4 Stars
Learned lockset has been discontinued
I ordered this entrance lock because your notes indicated that the turn button on the inside is designed to stay locked unless turn button is disengaged by the user. I prefer this type of operation. (I have had this type of operation on another exterior door of my house for many years.) I have been disappointed with this lock set since it was installed and does not operate the way your notes say. I called customer service and they indicated they no longer make this entrance lock that I thought I ordered and that it could not be returned since it was installed. I was told customers preferred the lock to disengage when the knob is turned and that is safer. I have to disagree and do not think that type of operation is safer because it operates just like a bedroom or bathroom door. I cannot understand why this type of entrance lock was discontinued and I was sent what I didn't want without an explanation. I suggest that you update your notes for the entrance and privacy locks on your website. It is difficult to give a rating for this lock because is not what I wanted and it seems to be impossible to get the kind of entrance lockset I want. The rating for what you sent me I suppose would be 4 stars because to me it is a privacy lock with a twist button lock that disengages when the knob is turned. Thanks for hearing me.
Did you find this helpful? 
Reviewed by:  from Warrenton, VA. on 10/9/2015

[productqa_] Questions and Answers

Question how do you replace a knob ?
Asked by: Bob - 4/21/2014
Question Hi Bob,

This will vary according to what type of hardware you have. Supposing you have a concealed screw mounted knob, first you remove the knob or lever from the inside. To do this locate the spring loaded pin on the shaft part of the knob. You can depress that little pin/button and the knob will slide off. Once you have that off you need to remove the rosette on the interior of the door knob. These sometimes just twist off, others have a little notch where you can carefully pry the rosette back. Once you have the knob and rosette off you should see two screws there. Remove those screws and the two halves of the knob will come off. You can then remove the latch from the edge of the door.

If your knob has expose screws on the inside, just skip the first two steps. Hope that helps! Answer provided by:  Jake (4/21/2014)
Question Can multiple Schlage F51A keyed entry knobs be ordered keyed alike? What is the current shipping time on this item?
Asked by: Scott - 12/5/2014
Question These typically ship the same or next business day. To have them keyed alike, just enter a note in the comments as you check out. Answer provided by:  Reggie (7/27/2016)
Question I live in Florida in a 1970s townhome. the front door is 2.4 inches thick. looking for a locking knob like this that will work will this? Or any similar models?
Asked by: Gerrie Brand - 1/10/2015
Question for a door that thick you will need to look at the Emtek Brand locks. Answer provided by:  Jake (7/27/2016)
Question Can I get this item keyed in the antique pewter finish?
Asked by:  - 11/6/2015
Question Yes, select the entrance function and antique pewter options in the dropdown menus or call us to place your order Answer provided by:  Josh (11/9/2015)
Question I want to get a keyed entry door knob keyed alike to an existing Emtek lockset. If I give you the original Emtek key number, can you do that? Or can I mail you the key if not? Thank you.
Asked by: Patrick - 3/31/2016
Question As long as the Emtek lockset you have has a Schlage C keyway then you can provide that code and it will be keyed alike. If it has a Weiser keyway then we won't be able to have them keyed alike. Answer provided by:  Jake L (3/31/2016)
Question can I order 2 of these that will have the same key?
Asked by:  - 4/24/2016
Question 2 of these locks can be keyed alike. You would just need to specify that in the "Keying Instructions" box on the right hand side of the checkout page. Answer provided by:  Jake L (4/25/2016)
Question Can I order 2 of these that can have the same key?
Asked by: Brandi - 4/24/2016
Question Yes, just put a note in the comments as you check out requesting that they be keyed alike. Answer provided by:  Jake (7/27/2016)
Question Hello, I need to order 2 of item SKU:F51A-ORB / Part# F51AORB626 and they need to have the same key. Is that possible?
Asked by: Brandi - 4/26/2016
Question Yes, these can be keyed alike. Answer provided by:  Jake L (4/27/2016)
Question I need a locking knob for a 3" thick door - do you have any?
Asked by: C - 5/9/2016
Question We don't have a locking knob available for a 3" door. You would need to go with an Emtek passage knob and combine it with a single cylinder deadbolt by Emtek. Answer provided by:  Jake L (5/10/2016)
Question I need to replace the front door hardware, but the handle has a 5" inset and the deadbolt a more traditional/modern inset,. How do I best order these so they're still keyed the same? Thanks.
Asked by: Stefanie - 7/12/2017
Question You can add them each to your cart and add keying notes in the comments, or just give us a call and we'd be happy to take the order by phone. Answer provided by:  Jake (7/12/2017)
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