Hettich Quadro V6
Drawer box for Hettich Quadro V6: sizes, notch and hook holes
Hettich’s Quadro V6 is the full extension, soft closing undermount runner behind the IW21 drawer platform, built in several generations: the original V6, the 4D V6, today’s 2D V6 and 5D V6, and the heavy duty V6+. This page is for anyone ordering a dovetail box to run on a Quadro V6 family slide, replacing a worn box or building a drawer from scratch.
Quick answer. A Hettich Quadro V6 box needs 1/2 in or 5/8 in sides, an inside width of opening minus 1 21/32 in, a length equal to the slide length, and a 1 3/16 in by 1/2 in rear notch with a 1/4 in hook hole. Hettich publishes the spec for the IW21 platform; tell us your exact model and we match it. The outside width works out to opening minus 13/32 in (10 mm, often written 3/8 in) with our standard 5/8 in sides, or opening minus 5/8 in with 1/2 in sides, and the box is cut to the 1/32 in.
The Quadro V6 drawer box, dimension by dimension
Every Quadro V6 generation, from the original to the current 2D and 5D runners, shares the same back of box prep. Only the front catch changes by generation, which is why Hettich and “Hettich with Quadro locking devices” are two separate choices in our configurator.
| Dimension | Quadro V6, 2D V6, 4D V6, 5D V6 | Quadro V6+ (heavy duty) |
|---|---|---|
| INSIDE DRAWER WIDTH | opening minus 42 mm (1 21/32 in) | opening minus 42 mm (1 21/32 in) |
| OUTSIDE WIDTH, 5/8 IN SIDES | opening minus 10 mm (13/32 in) | opening minus 10 mm (13/32 in); 5/8 in sides only on V6+ |
| OUTSIDE WIDTH, 1/2 IN SIDES | opening minus 16 mm (5/8 in) | not rated |
| SIDE THICKNESS | 1/2 or 5/8 in (16 mm maximum) | 5/8 in only |
| BOX LENGTH | Equal to the nominal slide length | |
| BOTTOM RECESS | 1/2 in (12.7 mm) maximum | |
| MAX SIDE HEIGHT | opening minus 13/16 in (20 mm) | opening minus 1 in (26 mm) |
| REAR NOTCH, EACH BOTTOM CORNER | 1 3/16 in (30 mm) wide by 1/2 in (12.7 mm) tall, flush with the side and the bottom | |
| REAR HOOK HOLE | 1/4 in (6 mm) diameter, 3/8 in (10 mm) deep, centered 9/32 in (7 mm) in from the inside face of the side and 7/16 in (11 mm) above the notch | |
| LENGTHS | 9, 12, 15, 18, 21, 24 in | 15 to 24 in, frameless only |
| LOAD, PER HETTICH | 90 lb dynamic, 100 lb static | 130 lb dynamic, 170 lb static |
One exception: the 4D V6 run with 5/8 in sides uses an inside width of opening minus 44 mm instead of 42 mm, about 1/16 in narrower than the rest of the family. Tell us if your runner is stamped 4D and has 5/8 in sides so we use the right number. The 4D V6 also carries a rear plastic catch that some installers use in place of drilling the rear hook hole; we still drill the standard hook hole unless you tell us otherwise.
Hettich’s older Quadro IW20 is a different, narrower installation width and not the same box as IW21. If your runner is stamped IW20, use the Other or unlisted slide model option in the configurator and tell us so, rather than ordering it as Quadro V6.
About the Quadro V6 runner
Quadro V6 is a full extension, concealed undermount runner with Hettich’s Silent System soft close built in on every current generation; push to open is a separate add on, not standard. Hettich rates the V6, 2D V6, 4D V6 and 5D V6 at 90 lb dynamic and 100 lb static, and the heavy duty V6+ at 130 lb dynamic and 170 lb static. Lengths run 9, 12, 15, 18 and 21 in on the standard runners, with a 24 in length added on current 2D and 5D runners for frameless or blocked out cabinets only.
To identify a Quadro V6 runner, pull the drawer and look at the stamp on the top or side of the metal member: it reads Quadro V6, 2D V6, 4D V6, 5D V6 or V6+. The generation stamp is what decides the front catch, not the box, since the notch and hook hole stay the same across every V6 generation.
Front catches: the part depends on your runner generation
Hettich calls the front locking device a catch. It slides onto the runner and screws to the drawer front, and the part is not shared across Quadro V6 generations, so we need your runner generation before a catch goes on your box.
| Runner generation | Hettich part | Note |
|---|---|---|
| Original V6 | 9144597 (international, left and right pair) or the US equivalents 9 140 413 (5/8 in sides) and 9 140 416 (1/2 in sides) | Our configurator’s “Hettich 9144597 Catches” option. Fits only the original V6, not later generations. |
| 4D V6 | 9 183 185 / 9 183 186 | Plus a rear tilt adjuster on some packs. |
| 2D V6 and 5D V6 | 9 306 533/534 or 537/538 (front mount), 9 306 535/536 or 539/540 (top mount) | Comes in 1/2 in and 5/8 in side versions. |
| V6+ | 9 117 483 / 9 117 485, set 9 117 492 | Heavy duty catch with a knurled height wheel. |
We do not stock Hettich runners or catches for separate sale. Choosing “Hettich 9144597 Catches” in the configurator has us press on a catch for $5.99 per box; put your exact runner generation (V6, 4D V6, 2D V6, 5D V6 or V6+) and side thickness in the order notes so the right part goes on. Choose No Clips and slide your own catches on if you already have the pair that matches your runner.
Lengths and depths we build for Quadro V6
Box depth always equals the runner length. Our configurator lists Quadro V6 depths at 9, 12, 15, 18, 21 and 24 in, whole inches only, since undermount runners come in whole inch lengths and the box has to match.
| Depth | Added cost over the base box | Minimum cabinet depth, 2D/5D frameless, per Hettich |
|---|---|---|
| 9 in | $0 | about 9 9/16 in (242.5 mm) |
| 12 in | $0 | about 12 17/32 in (318.5 mm) |
| 15 in | $7.99 | about 15 9/16 in (395 mm) |
| 18 in | $7.99 | about 18 17/32 in (471 mm) |
| 21 in | $7.99 | about 21 17/32 in (547 mm) |
| 24 in | $9.99 | about 24 9/16 in (623.5 mm); frameless or blocked out only |
Prices current as of October 2026. Notching and the width, depth and standard clearances are free; depth pricing above is for the length itself, on top of the $46.99 starting price for a custom box.
A worked example: 18 in opening to box
Say your cabinet opening measures 18 in wide and your Quadro V6 runner is stamped 18 in, with our standard 5/8 in sides. Inside width works out to 18 in minus 1 21/32 in, or 16 11/32 in; outside width is the simpler opening minus 13/32 in (10 mm, often written 3/8 in), or 17 5/8 in. In the configurator you enter 17 5/8 in as the width, pick Hettich Quadro V6 as the slide model, and pick an 18 in depth to match the runner. We cut a 1 3/16 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, on both sides, no extra charge.
If you have the 4D V6 with 5/8 in sides, tell us in the order notes: that specific combination uses opening minus 44 mm inside instead of 42 mm, about 1/16 in narrower than the figure above.
Keep your Quadro V6 slides or replace them?
Keep them if they still glide and close without grinding. A Quadro V6 runner is a mechanical part separate from the wood box, and the box, not the runner, is usually what fails first on a stapled or doweled drawer. Unscrew the old box from the runners, screw the new dovetailed box on at the same height, and reconnect the catches.
Replace the runners only if a member is bent, the soft close no longer catches, or you are changing generations, for example moving from an older 4D V6 to a current 5D V6. A new runner pair in the same length keeps the same box; the only thing that changes is the catch.
Common mistakes with Quadro V6 boxes
- Ordering catches without the generation. The original V6, 4D V6, 2D/5D V6 and V6+ each take a different part. Say which one is stamped on your runner.
- Using the 42 mm rule on a 4D V6 with 5/8 in sides. That one combination needs 44 mm instead, about 1/16 in narrower inside.
- Confusing IW20 with IW21. The older IW20 platform is a narrower installation width and not the same box; order it through Other or unlisted slide model if that is what you have.
- Putting a 24 in runner on a face frame cabinet. The 24 in Quadro V6 length is frameless or blocked out only.
- Forgetting the V6+ height rule. The heavy duty runner needs opening minus 1 in on side height, not the opening minus 13/16 in that the lighter generations use.
Technical sources
- Hettich: Quadro IW21 catalog, woodworkinstitute.com. Revision: January 2025.
- Hettich: 9144597 catch listing, shop.hettich.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
Is a Quadro V6 box the same as a Blum TANDEM box?
Mostly: both use inside width equal to the opening minus 1 21/32 in and a 1/4 in hook hole at the same position for the standard 16 mm sided generations, but Hettich’s own rear notch minimum is 1 3/16 in (30 mm), narrower than Blum’s 1 3/8 in (35 mm). A box cut to Blum’s wider notch clears Hettich’s drawing too. The front catches are never interchangeable between the two brands, so order the box for the runner you will actually mount.
What is the difference between Quadro IW20 and IW21?
Installation width, the space the runner takes between the cabinet side and the drawer: a narrower figure on the older metric IW20 family, a wider one on today’s IW21. They are not the same box. Everything in this guide is IW21, which is what Hettich sells in the US today.
Why do you need my runner generation for the catch?
Because the front catch is a different part on each Quadro V6 generation: the original V6, the 4D V6, the 2D and 5D V6, and the V6+ each use their own catch. The notch and hook hole stay the same on all of them, so the box is safe either way; only the catch has to match.
Does box length equal slide length on Quadro V6?
Yes. Hettich’s nominal length is the box length: a runner stamped 18 in gets an 18 in box. Metric Hettich documents outside the US sometimes write box length as the runner length minus a small offset, which is a different runner family, not the Quadro V6 sold here.
Can a 4D V6 skip drilling the rear hook hole?
Some installers use the 4D V6’s rear plastic catch in place of the drilled hook hole. We drill the standard hook hole on every Quadro V6 box unless you tell us in the notes that you are using the 4D V6 rear catch instead.
Does the 24 in Quadro V6 runner work on a face frame cabinet?
No. The 24 in length on the current 2D and 5D runners is rated frameless or blocked out only. Face frame cabinets need a length of 21 in or less.
Related reading
- Notched drawer boxes, every slide model: the hub table for every runner we notch for.
- The full Hettich Quadro guide: every generation, catch and the IW20 comparison in one place.
- Undermount drawer slides explained: how the notch, hook and clip work together.
- How to install undermount drawer slides: mounting and adjusting the runner.
- Other undermount slides: for Hettich Actro and anything not listed here.
Sources
Dimensions and part numbers come from Hettich’s Quadro IW21 catalog (January 2025) and the Hettich 9144597 catch listing, which scopes that part to the original Quadro V6 and Quadro 25 only. Check the drawing for your exact runner before cutting anything yourself.
Build your Quadro V6 box
Pick Hettich Quadro V6 in the configurator, enter your outside width, and we cut the notch, drill the hook hole and press on the right catch for $5.99 if you want it installed. Dovetailed, cut to the 1/32 in, built in our Las Vegas shop.