In stock
Heavier construction for an increased weight rating of 125 pounds per drawer!
Grouped product items
Product Name Price Qty
18'' Blum Heavy-Duty Tandem BLUMotion Undermount Drawer Slides (Pair)
18'' Blum Heavy-Duty Tandem BLUMotion Undermount Drawer Slides (Pair) Item #: 48568
In stock
$62.99
  • Buy 5 for $56.69 each and save 10%
21'' Blum Heavy-Duty Tandem BLUMotion Undermount Drawer Slides (Pair)
21'' Blum Heavy-Duty Tandem BLUMotion Undermount Drawer Slides (Pair) Item #: 48457
In stock
$64.99
  • Buy 5 for $58.49 each and save 10%

Blum® Heavy-Duty Tandem BLUMotion Undermount Drawer Slides

Item #
GRP40016
Rating:
96% of 100
Blum® Heavy-Duty Tandem BLUMotion Undermount Drawer Slides Rockler Undermount Drawer Slide Jigs
Blum® Heavy-Duty Tandem BLUMotion Undermount Drawer Slides

These slides combine all the benefits of the original Blum Tandem drawer slides, such as whisper-quiet soft-close action and totally concealed full-extension runners, with an increased weight rating of 125 lbs/drawer. The self-closing mechanism engages 2'' before the drawer is closed, and ever so gently eases it back into the cabinet. The undermount design makes them ideal for showing off the beauty of your wooden drawers. They feature easy tool-free adjustments in four planes: up-and-down, front side-to-side, rear side-to-side and tilt, plus depth adjustment with the elongated holes.


Blum Heavy-Duty Full-Extension TANDEM Drawer Slides must be mounted directly to the cabinet sides (in frameless box cabinet construction) or to slide-length spacer blocks securely attached to the cabinet sides (in cabinets that have face frames). Do not use rear mounting brackets.

(2) Blum Heavy-Duty Tandem Blumotion Undermount Drawer Slides
More Information
Brand Blum
Weight 7.0200
Tech Spec
  • Lengths Available: 18'' and 21''
  • Weight Capacity: 125 lbs
Technical Documents Blum Heavy-Duty Tandem BLUMotion Undermount Drawer Slide Instructions
4.8 / 5.0
11 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
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Best ever for heavy duty requirements of high end furniture/cabinets
I purchased this model for a sewing/embroider/serger combo table I built for my wife. I designed the machines to rest on movable trays rather than enclosed drawers. Both are 18” deep by 21” wide & 41” wide. I am thrilled with this product. Needed to have the sewing machines to be pulled fully pulled out for access to adjustments and change attachments. No racking just no drag smooth movement.
May 10, 2019
Purchased
1 year ago
Woodworking Experience:
Advanced
The best out there
Yes they cost a lot, relatively anyway, but if you want the best, here it is. Buy it once, install it properly, and you won't have to worry about these again.
August 16, 2018
Woodworking Experience:
Advanced
Really great. It’s the only drawer glides to buy.
Great product! Great drawer glides. I figured out how to install them using my witts and the internet but instructions would have been helpful.
July 4, 2018
Purchased
1 year ago
Woodworking Experience:
Intermediate
Performs as advertised
My application pushed the slide to the limits of its specs and worked like a champ.
March 23, 2018
Purchased
1 year ago
Woodworking Experience:
Intermediate
High quality
If you are embarking on kitchen improvements from your honey do list of jobs these slide are high quality and complete not like some home improvement chain stores
October 27, 2016
Purchased
over 2 years ago
Woodworking Experience:
Intermediate
Blu Motion is tops
I have used these slides on two different projects and everyone that comes over wants to open close the drawers that they are used on.
January 20, 2016
Purchased
over 4 years ago
Woodworking Experience:
Intermediate
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 18 questions Browse 18 questions and 28 answers
Why did you choose this?
Rockler Store
I have a project with a large drawer that will undoubtedly see heavy loads. Wanted to maximize the width of the drawer while concealing the slide hardware. I think these will do nicely.
EEWdad on May 19, 2018
Excellent quality and easy installation.
Donald D on Oct 27, 2017
I have a project with a large drawer that will undoubtedly see heavy loads. Wanted to maximize the width of the drawer while concealing the slide hardware. I think these will do nicely.
EEWdad on May 19, 2018
for work
Patricia W on Apr 16, 2018
Excellent quality and easy installation.
Donald D on Oct 27, 2017
easy to install and they work nice
Arthur P on Sep 26, 2017
I chose this product because of the versatility and quality of Blum products.
David S on Feb 15, 2017
Application required
Guy V on Feb 6, 2017
best value
Gary S on Jan 2, 2017
They were what is was looking for with no major searching
Leon S on Oct 5, 2016
Replacement for broken parts
Robert H on Oct 1, 2016
IM BUILDING A RECESSED DRAWER IN WALL
frank V on Sep 30, 2016
It is similar to existing hardware in need of replacing.
Lori K on Jul 26, 2016
For my safes roll-our shelf
John B on May 14, 2016
Good quality and good price.
Bobby F on Apr 10, 2016
Ordered in error and I need to return it. I thought I was ordering the floor mount pantry pull-out slide
Bill S on Mar 13, 2016
Strong and silent. I have used these slides on 3 projects previously, and I just ordered 3 more pair. They're easy to install, strong, and the motion is smooth, quiet, and the closing motion is just ideal.

My wife tells me "But ... we got really good cabinets in the kitchen." Yeah, maybe. But the ones that I have replaced with these glides are a *lot* better.
michael g on Dec 1, 2015
Replacement part for Ultracraft Cabinets drawer below microwave.
current glide is bent.
James V on Nov 24, 2015
REPLACE WHAT WE HAVE THAT ARE BROKEN
Mike A on Oct 2, 2015
looks heavy duty
IgalElf on Aug 16, 2015
Best quality, ease of installation.
Ken M on May 22, 2015
Highest quality by far
Richard A on May 11, 2015
for work
Patricia W on Apr 16, 2018
easy to install and they work nice
Arthur P on Sep 26, 2017
Is this the heaviest duty under-mount drawer guide available?
Pamela F on Sep 23, 2016
What is the Maximum drawer width for these slides?
debbie b on Jul 21, 2015
Can these drawer slides be used outside in a kitchen island?
Todd H on Jul 5, 2017
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BEST ANSWER: I really do not know. If by "outside" you mean the slides could get wet with rain, I would say no. These things appear to be intended for dry service. BUT, they seem to operate well year in and year out in kitchens and bathrooms where relative humidity is sometimes high. I suggest you contact the manufacturer or a knowledgible vendor for better info.
Can I install two pairs (Blum item #48568) to one drawer--one set above the other-- to double the weight bearing load?
Byron C on Nov 22, 2015
BEST ANSWER: No. These drawer slides are "L" shaped with the bottom leg of the "L" wrapping under the bottom of the drawer side. You might be able to mount a "side mounted" slide to the side of the drawer above the BLUM undermount slide but the distance between the drawer side and the side of the opening will very likely be different. Check the specs. Note that there are "side-mounted" slides that are available that are rated for 200 lbs., which I believe Rockler carries in stock.
Can these replace standard Blum tandem...a direct swap?
I have a drawer that is overweighted with standard Blum undermount
brandon F on Nov 24, 2016
My cabinet is only 19 inches deep. Will these work?
David U on Jan 14, 2016
BEST ANSWER: If drawer fronts are overlay than yes. They need about a half inch behind drawer box
What is the Maximum drawer width for these slides? I didn't see any answer to the question posted previously...
Chris on Dec 7, 2018
BEST ANSWER: These types of drawer glides are not limited by a maximum width. However, I would assume that if the drawer became too wide, you might have to consider using the cross stabilizer that Blum has available to ensure the drawer pulls out straight and doesn't rack. I have used them on 32" wide drawers with no problems.
How do I remove a drawer which has under draw fittings?
Mick B on Mar 30, 2018
BEST ANSWER: There are two clips, one on each side of the drawer underneath at the front. Squeeze the levers and the drawer should be released.
I'm making frameless cabinets with 16 1/2" interior depth (from back of drawer fronts to back of cabinet). Will the 18" slides fit?
Kim N on Feb 8, 2018
BEST ANSWER: Kim N,

Hi.

I didnt buy the 18" but the 21" so i cant say.

If you go to the Rocker site and look at the page with the glides, you will see near the bottom "technical downloads" There are 2 there and one will have better info from the other one. From one of them, you should be able to figure it out.

good luck
Will these work for inset drawers?
David M on Nov 10, 2015
BEST ANSWER: Absolutely. Just set the front of the slide 1/8" back from where you wish the drawer front to be. Keeping in mind that there may be a drawer box and the added drawer front. These are my favorite drawer slides. Just built a kitchen island with full inset drawers. I used the heavy duty for a drawer holding only plates. Smooth and soft close as advertised.
I got my 18” Blum full extension under mount but there were no instructions. What do I do?
Pogosparky Ted H on Nov 3, 2017
BEST ANSWER: http://go.rockler.com/tech/48457-Tandem-Slide-Instructions.pdf
can I install the stationary runner to a fixed shelf, rather than to the cabinet side and back?
Tom B on Dec 15, 2016
BEST ANSWER: I mounted the Blum bottom mount drawer slides to the bottom of a sink base cabinet base using Blum Universal Bracket Item # 21577.
My drawer is built with 3/4" sides, with a 1/2" bottom dadoed in 1/2" up from bottom. Will this work for 3/4" stock? if not, what slide will, as I'm trying to save an inch of space in a very narrow application?
kalamputi on Jul 16, 2016
BEST ANSWER: The Blum tandem slides that we sell are for 1/2" to 5/8" sides. You are looking for the Blum F series tandem slides.
My drawers are 22" can l get soft close runners for that size?
V P on May 30, 2016
BEST ANSWER: To my knowledge you can only get the lengths shown in the catalog. You may be able to get the 21" to work with a little bit of "customization" by mounting the front of the slides back into the cabinet 1" in stead of the standard 1/8" back from the face. You would only have 21" of travel but I would think that would suffice in most cases.
My drawers measure 21 .5 " what size slide should I order?
charlie brown on Mar 24, 2016
BEST ANSWER: Both the 18" and 21" will work. The 18" might be a little easier to install (you will have more space) but it will limit how far you can pull the draw out. I would probably go with the 21".
do the adjustment locking devices come with these drawer slides?
A shopper on Apr 18, 2015
BEST ANSWER: The orange locking devices that mount under the drawer come with these slides
What is the finished outside drawer box length for 21" glides?
gary t on Mar 3, 2017
Can I convert my Accuride Eclipse undermount slide to the Blu Motion undermount slides?
Nazam N on Jan 4, 2017