Slides

Blum undermount drawer slides

By Dale McCoy, head of production · Updated October 2026

Blum makes two undermount platforms, Tandem plus BLUMOTION and Movento, and we stock both along with the front locking clips that hold a box to them. Each platform publishes its own notch and clip prebore, so a box cut for one does not drop onto the other. This page is the model by model map: what we stock, the lengths each comes in, the box prep by platform, and how to order the slide and the box together.

Quick answer. We stock two Blum undermount platforms, both soft close standard: Tandem plus BLUMOTION 563 (563F and 563H, 9 to 21 in) and Movento (763, 763H, 12 to 21 in, and 769 heavy duty, 18 to 30 in). Every runner notches to the box it needs for free on our configurator; only the front locking clip, Blum T51.1901 for Tandem or T51.7601 for Movento, is a separate pick, installed at the shop when you choose it. Gritly cuts and drills every Tandem or Movento box from the same custom configurator used for every other drawer box style, so Baltic Birch or Hard Maple (Select Grade) and all the usual options still apply.

Build a Blum ready box

Every undermount runner we notch for

Slides and clips we stock

Five runners across the two platforms, plus the two front locking clips that go with them. Rear mounting brackets and sockets for face frame cabinets, and the T51.1801, T51.1901.PS and T51.0801.20 alternate clips, are in Blum accessories.

Tandem or Movento?

Tandem plus BLUMOTION 563 is rated 100 lb static, 90 lb dynamic, on a 21 in runner, and comes in two widths: 563H for 1/2 to 5/8 in sides, and 563F for 5/8 to 3/4 in sides. There is no TIP-ON push to open version of the 563.

Movento steps up the load: 763 and 763H are rated 125 lb static, and the heavy duty 769 is rated 170 lb static. Movento takes 1/2 to 5/8 in sides only, no 3/4 in version, and is Blum’s only wood drawer runner compatible with TIP-ON BLUMOTION push to open and SERVO-DRIVE. The 763H name on our product page marks the face frame and rear bracket capable version of the 763, not a heavier runner; 769 is the heavy duty step up, not 763H.

BLUMOTION drawer slides: what the name means

BLUMOTION is Blum’s name for the soft close damper built into the runner itself, not a bolt on option. Every Tandem plus BLUMOTION 563 and every Movento we stock ships with that damper already in place, which is why both platforms get called blumotion drawer slides as often as soft close undermount slides. The 563H, the Blum Tandem drawer slides we stock for 5/8 in drawer sides, carries the same built in damper as the heavier Movento runners.

Lengths we stock

Model	Side thickness	Lengths	Load
Tandem plus BLUMOTION 563H	1/2 to 5/8 in	9, 12, 15, 18, 21 in	100 lb static / 90 lb dynamic
Tandem plus BLUMOTION 563F	5/8 to 3/4 in	9, 12, 15, 18, 21 in	100 lb static / 90 lb dynamic
Movento 763	1/2 to 5/8 in	12, 15, 18, 21 in	125 lb static
Movento 763H	1/2 to 5/8 in	12, 15, 18, 21 in	125 lb static
Movento 769 heavy duty	1/2 to 5/8 in	18, 21, 24, 27, 30 in	170 lb static

Depth on the configurator matches the runner: Tandem offers 9 to 21 in, Movento 763 and 763H offer 12 to 30 in with the 24 to 30 in sizes building as a 769, and notched boxes are whole inches only.

A quick depth check: Blum’s TANDEM 21 in runner is the one for a 24 in deep cabinet, and it needs at least 21 15/16 in of inside cabinet depth to seat. Shorter runners in the table above scale the same way, so match the runner to the depth you actually have before you order.

The drawer box Blum slides need

Tandem and Movento share the same inside width rule: inside drawer width equals the cabinet opening minus 42 mm (1 21/32 in). With our standard 5/8 in sides that puts the outside box width at opening minus 10 mm (13/32 in, often written 3/8 in) for 563H, 763, 763H and 769 alike. 563F, built for thicker sides, goes further: with 3/4 in sides the outside width is opening minus 11 mm (7/16 in), with an inside width of opening minus 49 mm. Bottom recess is 13 mm (1/2 in) on every model.

The notch is where Tandem and Movento part ways. A Tandem box takes a 35 mm (1 3/8 in) minimum rear notch. Movento needs a wider 50 mm (1 15/16 in) notch without TIP-ON, or 125 mm (4 15/16 in) with TIP-ON BLUMOTION. The hook hole itself sits in the same spot on both platforms, 6 mm diameter, 10 mm deep, 7 mm in from the inside face of the side and 11 mm above the notch. Where the two platforms really differ is the clip prebore: Tandem’s locking device holes sit 32 mm along the side from the inside front corner, Movento’s sit 23 mm, a 9 mm (11/32 in) shift. A box bored for Tandem clips does not fit Movento clips, and the reverse, so we cut each box to the exact model you pick.

Full drawings, cabinet depth tables and the shop picks for each model are on notched drawer boxes for Blum Tandem 563 and notched drawer boxes for Blum Movento 763, with the brand by brand table on drawer boxes for Blum undermount slides.

Locking devices

Blum T51.1901 is the standard locking device for Tandem plus BLUMOTION 563, adjustable height up to plus 3 mm and side to side up to plus or minus 1.5 mm, with a minimum inside drawer width of 170 mm (6 11/16 in). Blum T51.7601 is the matching device for Movento, the same adjustment range and the same 170 mm minimum width, but never interchangeable with the Tandem clip because of the clip prebore shift above. Both press on at the shop when you choose them in the configurator, left and right in a pair. Face frame cabinets add a rear mounting bracket or socket, shared by both platforms, so the back of the runner reaches the cabinet back instead of the frame stile.

Order the slides and the box together

1. Pick the platform

On the custom box configurator, choose Notched & Drilled For Undermount Slides, then Tandem plus BLUMOTION 563 or Movento 763.

2. Set the width

Enter the outside box width from the table above: opening minus 13/32 in for 563H, 763, 763H or 769 with 5/8 in sides, or opening minus 7/16 in for 563F with 3/4 in sides.

3. Add the clip

Pick Blum T51.1901 or T51.7601 to have it pressed on, or leave it at No Clips if you already have a pair.

4. Match the depth

Choose the whole inch depth that matches the runner length you are running; notched boxes do not take a depth fraction.

Cabinet shops with a full cut list can price it on the instant quote tool or order through the trade portal.

Questions

What is the difference between Tandem and Movento?

Load and compatibility. Tandem plus BLUMOTION 563 is rated 100 lb static, 90 lb dynamic, and comes in two widths for 1/2 to 5/8 in or 5/8 to 3/4 in sides. Movento steps up to 125 lb static on the 763 and 763H and 170 lb static on the 769 heavy duty, takes 1/2 to 5/8 in sides only, and can also be set up with TIP-ON BLUMOTION push to open, which needs a wider rear notch.

What is the difference between 563F and 563H?

Side thickness. 563H is built for 1/2 to 5/8 in sides. 563F is the thicker sided version, built for 5/8 to 3/4 in sides, and cuts a slightly wider box to suit.

Do the locking clips come with the slide?

No. Blum sells the runner and the locking device as separate parts on every model. Pick T51.1901 or T51.7601 on the configurator to have the matching pair pressed on, or order No Clips and press on your own.

What notch does a Blum undermount box need?

35 mm (1 3/8 in) minimum for Tandem plus BLUMOTION 563. Movento needs a wider notch, 50 mm (1 15/16 in) without TIP-ON or 125 mm (4 15/16 in) with it. We cut the right one automatically once you pick the model.

Will a Tandem clip fit a Movento runner?

No. The two platforms bore their clip holes in different spots, 32 mm from the inside front corner on Tandem and 23 mm on Movento, a 9 mm shift. Order the box for the platform you are actually running.

What is the heaviest duty Blum undermount slide you stock?

Movento 769 heavy duty, rated 170 lb static, in 18 to 30 in lengths. It uses the same 50 mm Movento notch as the 763 and 763H.

Can I add TIP-ON push to open to my Movento drawer?

Yes, on Movento only, since there is no TIP-ON version of Tandem plus BLUMOTION 563. TIP-ON needs a wider 125 mm rear notch, so tell us at order time rather than adding it to a box already cut for the standard 50 mm notch.

How do I order a Blum Tandem or Movento ready box?

Pick Notched & Drilled For Undermount Slides on the custom box configurator, choose Tandem plus BLUMOTION 563 or Movento 763, enter the outside width from the table above, add the matching clip if you want it pressed on, and match the depth to your runner length.

Do face frame cabinets need a rear mounting bracket for Blum undermount slides?

Usually, yes. In a face frame cabinet a rear mounting bracket carries the back end of the runner from the cabinet back; Tandem and Movento share the same bracket. We stock the steel screw on rear mounting bracket for it.

Where can I buy Blum drawer slides?

Gritly stocks Blum Tandem plus BLUMOTION 563 (563F and 563H) and Movento (763, 763H and the 769 heavy duty) directly, along with the matching front locking clips. Buy the runner on its own product page, or add it to a custom drawer box so the notch and clip come already fitted.

How do you adjust Blum undermount slides?

Blum undermount drawers adjust at the front locking clips: the T51.1901 clip on TANDEM sets height and side to side, the basic T51.1801 clip sets height only, and MOVENTO takes the 298.7600 depth adjuster for front to back. See our undermount slide adjustment guide for the full steps.

Where can I buy Blum soft close drawer slides?

Gritly sells Blum’s soft close BLUMOTION undermount runners directly, Tandem plus BLUMOTION 563 (563H and 563F) and Movento (763, 763H and the 769 heavy duty). Buy the 563H runner on its own, or add it to a custom drawer box so the notch and clip come fitted. The matching T51.1901 or T51.7601 clip presses on at the shop when you choose it.

Where can I buy a Blum rear mounting bracket?

Gritly sells the Blum rear mounting bracket that carries the back of a Tandem or Movento runner in a face frame cabinet. We stock the steel screw on rear mounting bracket and nylon socket versions in screw on and plug in. Frameless cabinets do not need either, since the runner screws straight to the cabinet side.

Order a box cut to the Blum runner you run

Pick Tandem plus BLUMOTION or Movento, enter your width, and the notch, drilling and clip come out right. Dovetailed, cut to the 1/32 in, built in our Las Vegas shop.