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Question about Blumotion Drawer Slides

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Forum topic by bh1710 posted 03-31-2018 03:01 PM 1773 views 0 times favorited 14 replies Add to Favorites Watch
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bh1710

19 posts in 906 days


03-31-2018 03:01 PM

Topic tags/keywords: blum drawer slides blumotion

So, here’s my first post in Lumberjocks. Hopefully, not a ridiculous question.

I’m completely re-doing a pantry and want to use Blumotion drawer slides. They will be undermounted. I need to make some drawers that aren’t the 15, 18 or 21” size that Blum offers. Is there any reason I cant add a spacer underneath the front edge of the drawer where the clip is attached to get an extra 2”? I know that if I do this the drawers won’t extend fully (I’ll lose whatever the size of the spacer is).

There are 18 drawers involved and I don’t want to make an expensive mistake with these very nice but costly drawer slides.

p.s. I have built a prototype using just a 1/2” spacer with the 15” slide. I now have a 15 1/2” drawer and it seems to work just fine but I’d love to hear if I’m about to do something stupid.

Thanks in advance.

Bruce


14 replies so far

View GR8HUNTER's profile

GR8HUNTER

6210 posts in 1131 days


#1 posted 03-31-2018 03:21 PM

NOT really sure what you are saying here picture might help us help you :<))
Welcome 2 LJ’s :<))

-- Tony---- Reinholds,Pa.------ REMEMBER TO ALWAYS HAVE FUN

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Rich

4555 posts in 1008 days


#2 posted 03-31-2018 03:32 PM

I understand what you’re saying. I haven’t tried doing that since I always am building the drawers and can do them to length, but I don’t see why it wouldn’t work. Obviously you’ll need to mount the slide farther back inside the case so the drawer will close completely.

The locking device does have screw holes that would allow it to be attached to the drawer bottom without a spacer if the drawer bottom is thick enough. If you do need to use a spacer, I’d recommend mounting it with the grain running parallel to the front of the drawer so the screws are going into cross grain and not end grain. It’ll be stronger that way.

-- Knowledge is not skill. Knowledge plus ten thousand times is skill. -- Shinichi Suzuki

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Luthierman

222 posts in 1506 days


#3 posted 03-31-2018 03:38 PM

Okay, I think I understand. Are we talking about the drawer depth here? One very important thing is that with the undermount slides, the part of the slide that is at the back of the drawer actually mounts to the back of the drawer via a precisely drilled hole, so as already mentioned above, you will have to under size your depth of drawer and mount it further back. Can’t you just make your drawers more shallow? They would still be full extension. Make the drawers fit the slides, not the other way around. You’ll be making it way more complicated than it needs to be.

-- Jesse, West Lafayette, Indiana

View Gene Howe's profile

Gene Howe

11625 posts in 3847 days


#4 posted 03-31-2018 03:45 PM



Okay, I think I understand. Are we talking about the drawer depth here? One very important thing is that with the undermount slides, the part of the slide that is at the back of the drawer actually mounts to the back of the drawer via a precisely drilled hole, so as already mentioned above, you will have to under size your depth of drawer and mount it further back. Can t you just make your drawers more shallow? They would still be full extension. Make the drawers fit the slides, not the other way around. You ll be making it way more complicated than it needs to be.

- Luthierman


Ditto

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

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bh1710

19 posts in 906 days


#5 posted 03-31-2018 05:05 PM

Here’s a picture of my prototype. I used a 1/2” spacer making it a 15 1/2” drawer using the 15” Blum hardware. The mounting of the 1/2 spacer was just done with glue and pin nails since it wasn’t meant to be installed.

All seems well except I lose 1/2” of travel. So… I’m looking to put in 2” spacers to get 17” drawers. The missing 2” of travel isn’t an issue. SWMOB wants 17” drawers so that’s why I’m pursuing this although I’d like to know anyway.

Thanks for your help.

http://i349.photobucket.com/albums/q388/richnbrave/IMG_0409_1.jpg?t=1522429316

View bbasiaga's profile

bbasiaga

1243 posts in 2414 days


#6 posted 03-31-2018 09:43 PM

These are 17.7” (450mm), pretty close. Why not just design for that?

http://www.leevalley.com/us/Hardware/page.aspx?p=55149&cat=3,43614,43616&ap=1

But yeah I think you can do what you are thinking…set the slide back by the 1.3” (the 400mm slides are 15.7”) and use a spacer to make the hardware fit. Then all you are giving up is the full extension opening.

Brian

-- Part of engineering is to know when to put your calculator down and pick up your tools.

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bh1710

19 posts in 906 days


#7 posted 03-31-2018 10:19 PM



These are 17.7” (450mm), pretty close. Why not just design for that?

http://www.leevalley.com/us/Hardware/page.aspx?p=55149&cat=3,43614,43616&ap=1
Brian

Brian:

Thanks for the tip. I’m curious… these look identical to the Blum hardware. Are they Blum? Do they install the same?
Quite a lot more sizes than what I could find.

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Rich

4555 posts in 1008 days


#8 posted 03-31-2018 10:41 PM

These are 17.7” (450mm), pretty close. Why not just design for that?

http://www.leevalley.com/us/Hardware/page.aspx?p=55149&cat=3,43614,43616&ap=1
Brian

Brian:

Thanks for the tip. I m curious… these look identical to the Blum hardware. Are they Blum? Do they install the same?
Quite a lot more sizes than what I could find.

- bh1710

They are Blum. The ones listed on the bottom are Blumotion. They are also about twice the price you should pay. I bought the 18” from Woodworker Express for about $22 and some change, and Lee Valley is selling them for $45.60. Pretty ridiculous if you ask me.

-- Knowledge is not skill. Knowledge plus ten thousand times is skill. -- Shinichi Suzuki

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bh1710

19 posts in 906 days


#9 posted 03-31-2018 10:54 PM


They are Blum. The ones listed on the bottom are Blumotion. They are also about twice the price you should pay. I bought the 18” from Woodworker Express for about $22 and some change, and Lee Valley is selling them for $45.60. Pretty ridiculous if you ask me.

- Rich

Wow! Thanks for this. Even with adding the locking devices and hardware that’s a HUGE savings. With 15 drawers that’s going to really make a difference.

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000

2859 posts in 1318 days


#10 posted 03-31-2018 11:59 PM

Looking at the bottom of the drawer.
You could make the drawer as long as you like,
as long as you make a double step for the hole that locks in the guide to go into.
The clip would go in the front as normal and the guide would install in the cabinet as normal.
You would lose some space in the height of the drawer though.

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cracknpop

350 posts in 2768 days


#11 posted 04-01-2018 12:42 AM

I have used these on more than one occasion and have been very satisfied with them. They at least come in a 16” length which is about all you would want in an 18” deep cabinet. Also cost alot less than Blum. Also have been very happy with WWHardware’s customer service.

https://www.wwhardware.com/kv-muv-75lb-for-1-2-and-5-8-material

-- Rick - I know I am not perfect, but I will keep pressing on toward the goal of becoming all I am called to be.

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Rich

4555 posts in 1008 days


#12 posted 04-01-2018 02:38 AM


They are Blum. The ones listed on the bottom are Blumotion. They are also about twice the price you should pay. I bought the 18” from Woodworker Express for about $22 and some change, and Lee Valley is selling them for $45.60. Pretty ridiculous if you ask me.

- Rich

Wow! Thanks for this. Even with adding the locking devices and hardware that s a HUGE savings. With 15 drawers that s going to really make a difference.

- bh1710

You’re welcome. They are a great company to work with. I made a couple of errors in my order and they phoned within 20 minutes of my hitting the purchase button to ask if I’d intended to get different items (basically telling me I screwed up without actually saying I was a moron). They were right, fixed the order for me while we were on the phone, and it saved me the hassle of making a return and delaying delivery of the cabinet to my customer.

https://www.woodworkerexpress.com

-- Knowledge is not skill. Knowledge plus ten thousand times is skill. -- Shinichi Suzuki

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Dutchy

3391 posts in 2587 days


#13 posted 04-01-2018 03:04 PM

What you want to do isn’t a problem, as long as you do not work according to the european 32 mm system. The 32 mm system has a row of holes 37 mm measured from the front. This 37 mm is also used for hinges and other compenents. The depth position of the drawer normally can be changed by 9 mm steps.

BTW I have seen a lot of (expensive) jigs on the internet that makes clear that some companies don’t understand the 32mm system, but of course there are also who do. If you work according the way the 32 system is meant it can be a very time saving system.

-- https://dutchypatterns.com/

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bh1710

19 posts in 906 days


#14 posted 04-01-2018 05:19 PM

Thanks for all of the info. Very helpfull. I’m posting seom Sketchup images of the pantry to make things a little clearer. This whole thing will live inside a pantry and you can see I’m really not dealing with any issues that I would if this was built as a true cabinet. The inside of the pantry doors is about 5 inches from the new construction I’m building.

I know this have been helpful from the start but I’ve actually re-drawn it several times since I started getting feedback here.

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