Should I Use Grease On Mortise Lock? - General DIY Discussions - DIY Chatroom Home Improvement Forum
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > DIY Forum > General DIY Discussions

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Like Tree4Likes
  • 1 Post By Windows on Wash
  • 1 Post By mathmonger
  • 1 Post By carpdad
  • 1 Post By georgemcq
Reply
 
Thread Tools
Display Modes
Old 05-09-2019, 02:57 PM   #1
Member
 
Join Date: Oct 2010
Posts: 5,418
Rewards Points: 540
Default

should i use grease on mortise lock?


Image is the lock I have. Each part was wiped clean, no 100 yr old crud. Just some dust that wiped clean.

Reassembling, I used thin coat of silicon paste for plumbing parts. And on the face of the parts that would be held down by the lock body and the plate. Although I used very thin coat, the striker and some other moving parts felt bit more sluggish. So I'm wondering if this kind of lock should be greased or left alone?


BTW, upper right corner is the set screw bracket to lock the key cylinder. I broke that bracket. Fortunately, breaking the bracket allowed the cylinder to turn. The bracket is repaired with jb weld and reinforced and is working now, but if removing such mortise locks, how to force to use on those set screws is, I think, by luck and chance.
Attached Thumbnails
should i use grease on mortise lock?-1.jpg  
carpdad is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 05-09-2019, 03:12 PM   #2
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: Washington DC Metro Area (VA, MD, DC)
Posts: 22,360
Rewards Points: 8,444
Blog Entries: 40
Default

Re: should i use grease on mortise lock?


Tiny bit of moly lube couldn't hurt.
Msradell likes this.
Windows on Wash is online now   Reply With Quote
The Following User Says Thank You to Windows on Wash For This Useful Post:
carpdad (05-09-2019)
Sponsored Links
Advertisement
 
Old 05-09-2019, 03:47 PM   #3
Member
 
Join Date: Dec 2012
Posts: 1,829
Rewards Points: 3,005
Default

Re: should i use grease on mortise lock?


My understanding is that grease/oil will accumulate dust and crud in a lock and should not be used. I used to use graphite powder. It's a dry lubricant so it doesn't attract dirt, but it's kind of messy. Now I go high tech and spray everything with Teflon.

https://www.homedepot.com/p/Blaster-...-TDL/202532762
Nealtw likes this.
mathmonger is online now   Reply With Quote
The Following User Says Thank You to mathmonger For This Useful Post:
carpdad (05-09-2019)
Sponsored Links
Advertisement
 
Old 05-09-2019, 04:55 PM   #4
Member
 
GrayHair's Avatar
 
Join Date: Apr 2015
Location: Northern Mississippi
Posts: 701
Rewards Points: 1,396
Default

Re: should i use grease on mortise lock?


Mortise locks come from the factory with a light film of grease in certain areas. It will collect some dust, but dust alone won't bother the lock; before reinstalling (and with the lock body well out of the way), clean the mortise pocket in the door. A shot of canned air at the end won't hurt.

IMHO, while silicone spray and graphite will not collect dust, neither do they provide the level of lubrication necessary for this application.
__________________
Any mention of codes is based on NFPA 70 and/or 72, as applicable, because they are the most widely adopted codes in the US. Local amendments may modify the code adopted in your area, so consult your local codes official.
GrayHair is offline   Reply With Quote
The Following User Says Thank You to GrayHair For This Useful Post:
carpdad (05-09-2019)
Old 05-09-2019, 05:51 PM   #5
Member
 
Join Date: Oct 2010
Posts: 5,418
Rewards Points: 540
Default

Re: should i use grease on mortise lock?


Teflon dry spray seems most promising. Some parts (such as dumbbell looking parts and others) are contained between the body plates and I thought some lube may help. But it may be just old, tired spring on the striker. I added a rubber washer to compress the spring so I'll see what happens.
I lost the handle set screw. I think it is still in the garbage bag. I'm debating if I should go through the rotting food to find it.
Msradell likes this.
carpdad is offline   Reply With Quote
Old 05-09-2019, 06:39 PM   #6
Member
 
GrayHair's Avatar
 
Join Date: Apr 2015
Location: Northern Mississippi
Posts: 701
Rewards Points: 1,396
Default

Re: should i use grease on mortise lock?


Quote:
Originally Posted by carpdad View Post
I'm debating if I should go through the rotting food to find it.
I'd recommend it. They're often odd sizes and/or threads.
__________________
Any mention of codes is based on NFPA 70 and/or 72, as applicable, because they are the most widely adopted codes in the US. Local amendments may modify the code adopted in your area, so consult your local codes official.
GrayHair is offline   Reply With Quote
The Following User Says Thank You to GrayHair For This Useful Post:
carpdad (05-11-2019)
Old 05-10-2019, 01:00 PM   #7
Maintenance / Locksmith
 
Join Date: Feb 2018
Location: Hockley, TX
Posts: 147
Rewards Points: 294
Default

Re: should i use grease on mortise lock?


I use white lithium grease sparingly on rub points in the mortise body at our college. No need to blast it with spray of any kind. That lock has been in use many years and has many years left.
Msradell likes this.
georgemcq is offline   Reply With Quote
The Following User Says Thank You to georgemcq For This Useful Post:
carpdad (05-11-2019)
Old 05-11-2019, 10:11 PM   #8
Member
 
Join Date: Oct 2010
Posts: 5,418
Rewards Points: 540
Default

Re: should i use grease on mortise lock?


Found the screw, sandwiched in some paper towels. I was de-tarnishing the brass in kitchen. This was after checking with local locksmith and a hardware store. No luck in those places.
For others in this situation, did some research, and the common size MAY BE 5/16-24. There is also online store called "antique lock store" or such. It had set screws.
carpdad is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Trouble with mortise entry lock kjmass1 General DIY Discussions 4 05-01-2016 03:48 AM
Mortise lock. Baldwin jp17622 Windows and Doors 2 08-30-2015 05:05 PM
Antique mortise door lock repair (possibly deadbolt problem?) ohman Windows and Doors 14 08-18-2015 10:58 PM
Mortise lock handle & deadbolt replacement creatrix Carpentry 4 06-01-2012 06:17 AM
Mortise Lock drose6 Windows and Doors 2 02-25-2012 10:04 PM




Top of Page | View New Posts