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Locksmithing/How to open Chubb combination safe


Hi Sir,
         I just get Chubb safe from my friend, that he forget the number to unlock the safe . He said that  40,50,60 ( right,left,right) standard combination .I try,but still can't . I also do know how to open . It is my 1st having safe  box.
        Can u kindly advice me how to  open it n what is the serial number and name of this Chubb model.


Hello Uthaya,

to my knowledge this Chubb lock is a four wheel lock and the dialing sequence should be as follows:

5 times right to the first number,
4 times left to the second number,
3 times right to the third number,
2 times left to the fourth number,
1 time right until the dial stops.   Turn handle to open.

Note:   Left is counter clockwise, Right is clockwise,  Do not count the revolutions of the dial, count the individual number as it arrives at the 12 o'clock index mark.

There are ONLY three reasons a safe lock won't open, in order they are:

1.  Incorrect dialing sequence, operator errors.    This could even include not being able to open the combo provided by a previous owner.    Generally combinations were passed along the way the previous owner understood it, and NOT necessarily the way the lock actually operates.

2.  Incorrect combination, wrong numbers.

3.  Mechanical problems.

Right now it appears to be more of a dialing error - thing.

Many times on a four wheel lock, owners didn't want the additional dialing, so two of the wheels would be set on the same number, so using the numbers provided, I would test dial it as both LRLR and as RLRL -

5 times Right to the first number,  40
3 times Left to the second number,  50
2 times Right to the third number,  60
1 time Left until the dial stops  (may be around 10).

If this doesn't work, try dialing it as:

5 times Left to the first number,   40
3 times Right to the second number, 50
2 times Left to the third number,   60
1 time Right until the dial stops   (may be around 90)

If you still have trouble with it and/or can't get it open, then I would recommend you contact a friend of mine in Singapore to have them look at it:

Siah's Old Safe Service
Desmond or David  Siah

Showroom & Office is located at
No 50, Serangoon North Avenue 4
First Centre (Near Northstar)
#06-09 S555856

333A Orchard Road
Mandarin Gallery #03-24
Singapore 238897

Hope this helps,  If not give David or Desmond a call and have them check your safe out.  


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Terry V. Andreasen (Andy)


Safe and Vault related Questions; Antique Safe Repair and Restoration; With over 42 years in the Safe & Vault industry, if I can't answer your question I know where to get the answer. Current Project: Restoration of an Ely Norris Cannonball Safe from the early 1900's. Will answer Safe & Vault related questions concerning age, value, restoration, moving, opening & repairing, parts, operation and history. Note: It is not my intention to teach you to open safes or to provide information which may aid in the unlawful opening of a safe. I will not give out drill points or information which I deem inappropriate.


44 years in the Safe & Vault Industry. Owner and Service Manager for one of the largest Safe & Vault companies on the West Coast. Graduate of Lockmasters Safe Lock Servicing, Safe lock Manipulation and Safe Deposit Lock Courses. Graduate of Locksmith Institute. Certified Instructor for the California Locksmith Association teaching Basic and Advanced Lock Servicing, Basic Safe opening and Repairing. Factory Trained by AMSEC, LORD Safes, LeFebure, Mosler, KabaMas, LaGard and Sargent & Greenleaf Author of "The Coffee Table Guide to Antique Safes".

SafeCrackers International and the National Antique Safe Association Safe & Vault Technicians Association (SAVTA)

The Coffee Table Guide to Antique Safes

Graduate of Locksmith Institute 1972 Graduate Lockmasters Safe Lock Servicing 1974 Graduate Lockmasters Safe Lock Manipulation 1975 Graduate Lockmasters Safe Deposit Lock Servicing 1985 Instructor Certified - California Locksmith Association - 1985 Factory trained by AMSEC, MAJOR, STAR, Johnson-Pacific, Kaba-MAS, Allied-Gary, ISM, Lord, Brown Safe, EXL, Mosler, Diebold.

Awards and Honors
2009 - 2015 - Listed in AllExperts Top 50 Experts. All Expert Categories - Safes & Security Containers, Locksmithing, Antique Safes. Retired US Army Chief Warrant Officer (CW4), with 39 years of total service. With numerous awards from Vietnam, Desert Storm and Operation Iraqi Freedom. US Navy - 1971-1981 US Army Reserve 1984-2013 US Army Retired

Past/Present Clients
US Secret Service, FBI, BATF, Local Law enforcment agencies, Diebold, Hamilton Pacific, Red Hawk Int., Chubb International, Bank of America, Wells Fargo Bank, Mechanics Bank, El Dorado Savings Bank, many Credit unions and smaller banks. McDonalds, Togos, BurgerKing, TacoBell, Carls Jr. FoodMaxx, SaveMart, Lucky's, Albertson's, Raley's, Safeway, NobHill, Bell Markets, PW Markets. Great America, Century Theatres, Cinemark Theatres, UA Cinemas, and many homeowners and small businesses. Provide warranty service for lock and safe manufactures. Service Area is Northern California (Fresno to Oregon and Western Nevada)

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