H17 Drawer Side Height: Finding the Right Replacement Drawer Runner

In double-walled drawer systems, the H17 side height refers to a tall side profile for which accurately fitting replacement runners must be selected based on nominal length, load capacity, and runner type.

When a drawer runner on an existing high-sided drawer becomes faulty, catches, or loses its load-bearing capacity, it is time to replace the runner. High drawers, frequently used in kitchens for heavy pots or food provisions, place significant leverage forces on the running gear. A direct replacement is only feasible if the technical parameters of the spare fitting match the cabinet carcass and existing drawer box precisely.

This guide is designed for fitters and experienced tradespeople who need to replace a damaged runner. It covers recording exact measurements in millimetres, selecting the correct extension type, and ensuring compatibility with existing hole patterns.

Key Purchasing Criteria for Replacements

Before selecting a new hardware fitting, the technical details of the old runner must be accurately noted or measured.

Nominal Length and Installation Depth

The nominal length defines the length of the runner when fully closed. It must match the depth of the drawer. Standard sizes for deep kitchen cabinets typically range from 450 mm to 550 mm. If the runner is too long, it will hit the back panel of the cabinet. If it is too short, extension reach is lost, and the fixing points on the drawer box will not align. Measure purely the metal length of the old runner, excluding any protruding plastic pins. For example, if you measure an exact length of half a metre, you require drawer runners 500 mm.

Load Capacity in Kilograms

High drawer sides (such as H17) indicate a large storage volume. Pots, crockery, or tools quickly add substantial weight. Standard runners are usually rated for 25 kg to 30 kg. For heavily used drawers, upgrading to heavy-duty drawer runners is recommended. These provide a load rating from 45 kg to over 80 kg. The mechanism is reinforced with thicker material gauges and more robust ball bearing cages.

Extension Type: Full Extension vs Single Extension

A full extension runner pulls out of the carcass by 100%. The rear panel of the drawer sits flush with the front edge of the cabinet. A single extension runner only opens to roughly 75%, leaving the rear section hidden inside the carcass. For deep and tall H17 drawers, choosing full extension drawer runners is always advisable when replacing parts, ensuring good ergonomics and easy access to items at the back.

System 32

In professional cabinetry, carcasses are drilled according to System 32. This means the spacing between holes in the side panel is exactly 32 mm. The distance from the front edge of the carcass to the first hole is standard at 37 mm. Ensure the mounting plate of the replacement runner supports this hole pattern to avoid drilling new holes in the carcass.

Overview of Runner Types and Mechanisms

Drawer runners differ fundamentally in their construction and how they are positioned on the drawer box.

Runner Construction Types

• Undermount runner: These runners are installed concealed beneath the drawer base. They are standard for modern, double-walled metal drawer systems. The drawer side rests on top of the runner, usually secured via a front locking clip. If you are replacing parts for an H17 system, you generally need undermount drawer runners.
• Ball bearing runner: These runners are screwed to the sides of the carcass and the drawer side. They consist of interlocking telescopic steel profiles containing steel ball bearings. They are very sturdy, but remain visible on the sides.
• Roller runner: A simple design where a plastic wheel runs along a track. It is mounted at the bottom side edges. Upgrading from old roller drawer runners to modern undermount or ball bearing runners usually requires modifying the drawer box, as installation widths vary.

Convenience Features: Soft-Close and Opening Assistance

The choice of mechanism depends on the required operating feel and front panel design. Note that standard versions of these two systems are mutually exclusive.

• Soft-Close: An integrated damper cushions the momentum of the closing drawer, pulling it shut quietly and smoothly over the final few centimetres. For replacements, choose drawer runners with soft-close.
• Push-to-Open: This mechanism is essential for handleless furniture fronts. A light press on the front triggers a spring that pushes the drawer outward. For this, push to open drawer runners are used.

Which Runner for Which Scenario? (Decision Guide)

To identify the correct replacement part, consult the following scenarios:

• If you have a double-walled metal drawer side in a modern kitchen, then you require an undermount runner that matches the nominal length (e.g. 500 mm) and the locking clip design of the drawer side manufacturer.
• If an older timber drawer with side-mounted telescopic runners is stiff, then measure the runner height (often 45 mm) and closed length, and replace it with an identically sized ball bearing runner.
• If you store heavy pans in an H17 drawer and the existing runner sags, then upgrade to a heavy-duty undermount runner rated for at least 40 kg.
• If the drawer slams shut, then replace the old roller runner with modern ball bearing or undermount runners featuring integrated soft-close (check installation width first).

Installation Advice for Replacements

Replacing a runner requires precision – if clearances are incorrect, the mechanism will bind.

Tools required:

• Cordless screwdriver
• PZ2 bit (Pozidriv) for woodscrews
• Tape measure or rule
• Pencil
• Bradawl (optional)

Step-by-Step Installation:

1. Removal: Pull out the drawer. For undermount runners, reach beneath the front and release the locking clips on the left and right to lift the drawer off the runners. For ball bearing runners, a small lever inside the track must usually be pressed to release the drawer.
2. Remove old runners: Undo the screws (usually 3.5 mm or 4 mm diameter) from the carcass wall.
3. Check position: Hold the new runner against the carcass side. Align using the front hole of the runner and the existing hole pattern (System 32, 37 mm from the front edge).
4. Fixing: Fasten the runner at the front first, then at the rear. For chipboard, use dedicated Euro screws (for 5 mm holes) or standard woodscrews (for 3 mm pilot holes). Ensure the runner is completely level.
5. Fitting and adjustment: Place the drawer box onto the runners and push it in until the clips audibly engage. Finally, adjust the gap alignment of the front panel using the adjustment wheels on the clips (height, lateral, and tilt adjustment where available).

Frequently Asked Questions (FAQ)

Can I replace a single extension runner with a full extension runner? Yes, this is generally straightforward provided the nominal length of the new runner and the lateral clearance (the gap between drawer and carcass wall) remain identical. For ball bearing runners, lateral clearance is typically 12.7 mm per side.

How do I measure the required runner length correctly? Always measure the runner fully closed, from the front metal edge to the back end. The extended length is not relevant for purchasing. Round down to standard nominal lengths (e.g. 400 mm, 450 mm, 500 mm).

Can Soft-Close and Push-to-Open be combined? No, in standard hardware these are opposing mechanisms. Soft-close actively pulls the drawer shut, whereas push-to-open tensions a spring to pop it open. Combining both forces in a standard runner is physically not possible.

What does installation width or side clearance mean? Side clearance is the precise gap required between the outer side of the drawer box and the inner wall of the cabinet carcass. If this measurement is incorrect, the drawer will jam or the ball bearings may come out of the track.

Why does my new undermount runner catch during insertion? This is usually caused by runners not being fitted parallel inside the carcass. If the runners are even 2 mm narrower at the back than at the front, the mechanism will bind. Check the internal carcass width at both the front and back.