Würth PRO634
Drawer box for Würth PRO634: sizes, notch and hook holes
Würth’s PRO634 is the PRO600 family built for 3/4 in drawer sides, sold through Würth Louis and Company and other Würth branches with its front locking devices and rear brackets already in the box. This page is for anyone ordering a 3/4 in sided dovetail box to run on PRO634.
Quick answer. A Würth PRO634 box needs 3/4 in sides, a length equal to the slide length, and a 1 3/8 in by 1/2 in rear notch with a 1/4 in hook hole. Würth confirms 3/4 in sides work on PRO634, and we build to that thickness. Würth has not published a drawing for the 3/4 in side width rule, so we do not print one here; comparable 3/4 in undermount runners run about opening minus 13/32 to 15/32 in outside (10 to 12 mm), and we confirm your exact width with you before cutting. No standalone Würth clip exists for PRO634; we sell Würth’s PRO600-FCLIP2D labeled for PRO634, with the fit against 19 mm sides unverified by Würth.
The PRO634 drawer box, dimension by dimension
| Dimension | Würth PRO634 |
|---|---|
| SIDE THICKNESS | 3/4 in (19 mm). This is one of only four undermount runners we build 3/4 in sided boxes for; every other undermount runner stays at 5/8 in sides unless separately confirmed. |
| OUTSIDE WIDTH | no Würth drawing published for 3/4 in sides. Comparable 19 mm runners run about opening minus 13/32 to 15/32 in outside (10 to 12 mm); we confirm the exact figure with you before cutting rather than print an unverified number. |
| BOX LENGTH | equal to the nominal slide length |
| BOTTOM RECESS | 1/2 in (13 mm) maximum |
| REAR NOTCH, EACH BOTTOM CORNER | 1 3/8 in (35 mm) wide by 1/2 in (13 mm) tall, maximum |
| REAR HOOK HOLE | 1/4 in (6 mm) diameter, 3/8 in (10 mm) deep, centered 9/32 in (7 mm) in from the side and 7/16 in (11 mm) above the notch |
| LENGTHS | 9, 12, 15, 18, 21 in |
| LOAD, PER WÜRTH | 100 lb |
The notch, hook hole and bottom recess are the same ones the rest of the PRO600 family uses; only the outside width is unverified, because Würth has never published a separate drawing for the 19 mm side version. If your Würth branch can supply that drawing, send it with your order and we cut to it.
About the PRO634 runner
PRO634 is a full extension, soft close concealed undermount runner, the same mechanism as PRO600 built for 3/4 in (19 mm) drawer sides instead of the thinner 5/8 in standard. It is rated 100 lb by Würth. Buy a new PRO634 pair direct from your Würth branch and it ships with its own 2D clips and rear brackets already included, the same way PRO500 and PRO Economy do.
To identify PRO634, pull the drawer and look at the stamp on the metal runner member for PRO634, or the part numbers PRO634-09B through PRO634-21B. Some Würth price sheets also list it as “PRO600 for 3/4 in drawer sides,” so check the side thickness your runner is actually built for, not just the model family name.
Clips: no standalone PRO634 part exists
Würth sells no clip listed on its own as a PRO634 part. A new PRO634 pair bought direct from Würth ships with its own 2D clips and rear brackets in the box, but that does not help us when we are pressing a clip onto a box here before your runners arrive.
Our configurator option “PRO634 2D Front Locking Devices,” $5.99, is Würth’s PRO600-FCLIP2D, the same part we sell for PRO600, re-sold under a listing labeled for PRO634. Say so plainly: Würth has not confirmed that the PRO600-FCLIP2D is sized for 19 mm sides, and we have not independently verified the fit ourselves. If your PRO634 runners already came with their own included clip, choose No Clips and press that one on instead.
Lengths and depths we build for PRO634
| Depth | Added cost over the base box |
|---|---|
| 9 in | $0 |
| 12 in | $0 |
| 15 in | $7.99 |
| 18 in | $7.99 |
| 21 in | $7.99 |
Prices current as of October 2026. Würth has not published a separate minimum cabinet depth table for PRO634; use the PRO600 table on our PRO600 page as a starting point, since the runner mechanism is the same length for length, but confirm against your own cabinet before ordering.
A worked example: 18 in opening to box
Say your cabinet opening measures 18 in wide and your PRO634 runner is stamped 18 in, with 3/4 in sides. Comparable 3/4 in undermount runners outside width run about opening minus 3/8 to 7/16 in, which would put your box in roughly the 17 17/32 in to 17 19/32 in range; send us the opening measurement and we confirm the exact figure before cutting, since Würth has not published a PRO634 specific drawing. We cut a 1 3/8 in by 1/2 in notch at each bottom rear corner and bore the 1/4 in hook hole 9/32 in in from the side and 7/16 in above the notch, both free. Add “PRO634 2D Front Locking Devices” for $5.99 and we press on our PRO600-FCLIP2D, labeled for PRO634 with the fit not confirmed by Würth.
Keep your PRO634 slides or replace them?
Keep them if they still glide, close and soft close without grinding. The box usually fails before the runner on a stapled or doweled drawer, and PRO634 is a mechanical part separate from it. Unscrew the old box, screw the new 3/4 in sided dovetailed box to the same runners at the same height, and reconnect the clip.
Replace the runners only if a member is bent, gritty or the soft close has failed. A new PRO634 pair in the same length keeps the same box.
Common mistakes with PRO634 boxes
- Ordering 5/8 in sides for PRO634. PRO634 is built for 3/4 in sides; a thinner side changes the fit against the runner’s own geometry.
- Trusting an exact PRO634 width without confirming it. Würth has not published a 3/4 in side drawing; we check the figure with you rather than guess.
- Assuming the PRO600-FCLIP2D is a confirmed PRO634 fit. It is the closest part we have, sized for PRO600’s geometry, not independently verified against PRO634’s 19 mm sides.
- Buying PRO634 expecting 5/8 in sides elsewhere in the kitchen to match. Only four runners we notch for use 3/4 in sides: PRO634, Grass Dynapro 19, Blum 563F and Salice A7955. Every other runner stays at 5/8 in.
Technical sources
- Würth: PRO634 listing, wurthmachinery.com. Revision: not stated.
Figures on this page were checked against these documents in October 2026. Our shop’s own rules (the 1 in side mount deduction, the cut list limits) come from how we build.
Questions
Which Würth slide works with 3/4 in drawer sides?
PRO634. It is the only runner in the PRO600 family built for 3/4 in (19 mm) sides; PRO500, PRO560, PRO600 and PRO Economy are all rated for sides up to 5/8 in.
Does PRO634 include clips?
A new PRO634 pair bought directly from Würth ships with its own 2D clips and rear brackets. When we press a clip onto a box here before your runners arrive, we use Würth’s PRO600-FCLIP2D, labeled for PRO634, since no standalone PRO634 clip exists for us to stock.
What width box do I need for PRO634?
We have not found a Würth drawing that states it for 3/4 in sides. Comparable 3/4 in undermount runners run about opening minus 13/32 to 15/32 in outside (10 to 12 mm); send us your opening and we confirm the exact figure before we cut.
Can I buy the PRO634 runner from Gritly?
Yes. We stock PRO634 and the PRO600-FCLIP2D clip labeled for it.
Is the PRO634 clip really made for PRO634?
We sell it labeled “for PRO634,” but it is Würth’s PRO600-FCLIP2D part, sized for the standard PRO600 geometry. Neither Würth nor Gritly has independently confirmed the fit against PRO634’s 3/4 in sides.
What is the difference between PRO634 and PRO600?
Side thickness. PRO634 is built for 3/4 in sides, PRO600 for sides up to 5/8 in. The notch, hook hole and recess are the same family pattern on both; only the width rule and clip differ.
Can I build a 5/8 in sided box now and switch to PRO634 later?
No. Side thickness is set when we dovetail the box, so a 5/8 in sided box cannot later take 3/4 in sided runners. Order PRO634 with 3/4 in sides from the start if that is the runner you plan to mount, or order PRO600 if you plan to stay at 5/8 in.
Related reading
- Notched drawer boxes, every slide model: the hub table for every runner we notch for.
- The full Würth PRO guide: PRO500, PRO560, PRO600 and PRO Eco in one place.
- Würth PRO600: the same family at 5/8 in sides, with two clips sold separately.
- Baltic Birch vs Hard Maple: choosing the species for a 3/4 in sided box.
- Undermount drawer slides explained: the 3/4 in side rule in context with every other runner.
Sources
Lengths, load and clip inclusion come from the Würth PRO634 listing. Würth has not published an installation drawing with a 3/4 in side width rule for PRO634, so we do not print an exact deduction; we compare it instead to the published 3/4 in side rules on other undermount runners and confirm the figure with each customer before cutting.
Build your PRO634 box
Pick Würth PRO634 in the configurator, tell us your opening so we can confirm the width, and we cut the notch, drill the hook hole and press on a clip for $5.99 if you want it installed. Dovetailed, cut to the 1/32 in, built in our Las Vegas shop.