Sugatsune is a great company for specialty items. I recommend them all the time. They are the only supplier I know that offers stainless steel concealed hinges. I get requests for stainless steel hinges frequently, especially for cabinetry in MRI rooms in hospitals, for outdoor kitchens and for marine use. I always refer the customer to Sugatsune for these.

According to the information in the Sugatsune catalog, 2 hinges are suitable for a maximum door weight of 55lbs. This indeed is a higher claim than most. Salice is 20lbs for 2 hinges. Blum specifies 15lbs for 2 hinges. (See chart below).

The Sugatsune specs however call for the use of six #10 screws to fix the hinge and plate (compared to four #6 screws for Salice and Blum). The additional screws and their over-size would increase the load rating possibility. The cup depth is 15mm and it is a 94 degree opening hinge.

I am sure this is a fine product as is everything I have seen from Sugatsune.

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In the #3 answer by Denis Bean he posted a chart to calculate the number of hinges for the weight of the door. The chart has metric 120 = 22.5 lbs. I can't for the life of me find anything metric that will give me the same results, not even close. I'm doing something wrong for sure, can you set me straight so i can use the chart accurately?
Thanks

Mike,

My error, sorry. Actually the engineering chart was originally in "newtons". My error was in the conversion. Actually 22.5lbs = 100 newtons (not 120). (4.45n = 1 lb.). I used an on-line auto conversion that gave the answer "120n" = 22.5lb. I should have double checked it. - the measure twice, cut once rule.

The number of hinges would remain the same however.

Thank you Dennis, i never heard of newton before this. I'm glad i can use the chart correctly now. If you don't mind i would like your input on the 165 degree hinge. I want to use it for an inset application with a thicker than normal door about 1 inch to 1-1/8 thickness. How small can i get the reveal between the door and cabinet side?
I found the formula H= (-2+K+A) but i also found another formula for A. where as A=(-2+k-H) but they do not agree with each other! I do appreciate you help, Thanks Mike.

Mike,

I agree that the 2 formulas seem to fight each other. Over the years, some Salice publications have presented the solution by solving for a negative number (the gap between the door and the side can be viewed as a “negative overlay”). I have always found this confusing.

Note: These formulas hold true for only Salice hinges. Other brands have a constant (-2) that is different and therefore will result in a different solution.

I prefer Method 2 where you solve for the mounting plate height. It makes much more sense than having a negative number as the answer.
The results, however will be the same. if you use method 1.

A = Gap
K = Edge bore distance (TAB)
H = Mounting plate height

Method I: A = (-2 + K) - H

-2mm = (-2 + 6mm) - 6mm
-2mm = (4) – 6mm
-2mm = -2mm (gap or negative overlay)

Results: Gap = 2mm; Edge bore distance = 6mm; Mounting plate height = 6mm

Method II: H = (-2 + K) + A

Here, you arbitrarily set the gap that you would like to see then solve for the mounting plate height that will give that desired gap between the door edge and the cabinet side. The edge bore distance is determined by trial & error until the formula balances.

H = (-2 + 6mm) + 2mm
H = (4) + 2mm
H = 6mm (mounting plate height)

Results: Gap = 2mm; Edge bore distance = 6mm; Mounting plate height = 6mm

Now, as far as the amount of gap you will need to turn a door that is 1” (25.4mm) or 1-1/8” (28mm) thick using the 165 degree hinge, here is a chart showing the minimum gap required to turn a door of various thicknesses without interference.

Take note that as the edge bore distance (K) increases, the amount of gap required decreases. You can play around with the numbers to get exactly the outcome you would like.

This explanation is in context to your application being frameless or face frame with the side built flush to the edge of the frame.

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HI....I have a shutter sized 20" wide and 13" height. What would be the recommended number of Auto hinges and the distance in between...Why I am asking is because in every chart it says that the distance between them should be greater than the width of the shutter. Kindly help!

Arism,

The rule of spacing of the hinges is very important. I would not recommend hinging a door on the side that is only 13" tall and 20" wide using European concealed hinges.

Can you hinge it at the top and make it a lift-up door (shutter)?

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Dennis,

On the example of the original door that was 88" tall, wouldn't that convert to 2235mm (88x25.4) which would put it into the range of 5 hinges, instead of 4?

Bernie,

You are correct it is close to 5 hinges and I would normally recommend this.

Since you mentioned that the center hinge would interfere with a shelf and that the range is still within 4 (high end) I believe you are safe with 4.

Also, it is quite a narrow door which gives you some breathing room too.

Thanks Dennis, I just wanted to make sure I was doing the conversion right. The charts are great, thanks so much for posting them.

The door height and weight will make great effect on teh number of hinges.
Doors less than 40inches high and below 5kg need 2 hinges.
Doors that are 40-60inches high and weigh 6-9kg need 3 hinges.
Doors that are 60-80inches tall and weigh 13-15kg need 4 hinges.
Doors that are 80-85inches tall and weigh 18-22kg need 5 hinges to secure.
If you would like to replace the kitchen cabinets hinges by yourself, here are more informantion for you: https://www.yigii.com/replacing-hinges-on-kitchen-cabinets/

Best Methods for Replacing Hinges on Kitchen Cabinets