Why the Blum Tandem System is Ideal for Your Kitchen Drawers
When you desire kitchen drawers that appear clean, are heavy-duty, and operate smoothly for years, consider Blum tandem runners. Since the hardware is concealed under the drawer, you maintain a streamlined look while enjoying premium movement and performance you can count on with a wide range of cabinet sizes. Blum is a world-leading cabinet hardware company, and tandem is one of its most popular solutions for wood drawers in kitchens and beyond.
What Is Blum Tandem?
Blum tandem is an undetectable undermount runner offered in full and single extension configurations. Global lines span lengths of 250–650 mm; North American lines typically measure 9–21 inches. Low-friction nylon rollers provide a feather-light glide, reducing metal wear for smooth drawer operation. Incorporate Blum motion technologies and you have soft, smooth closing.
Load Classes: Sizing tandem for Weight
Capacity varies by series. Core global tandem runners are 30 kg dynamic rated; there are some series which go up to 50 kg. North American tandem plus BLUMOTION and tandem edge sets are sold with a static load of 75–100 lb (model dependent). For extra-heavy or oversized drawers, compare Blum MOVENTO, which has increased load ratings. Always verify the sheet for the precise SKU before cutting parts.
Motion Options with tandem
Soft-close BLUMOTION is common and helps prevent slamming. Selected tandem models can pair with SERVO DRIVE for powered opening in handleless fronts. If you prefer mechanical push to open, use TIP ON accessories with tandem plus runners, or choose integrated TIP ON versions such as TANDEM 19 mm full extension that trigger with a light touch anywhere on the front.
Adjustment & Assembly
You receive beneficial fine-tuning. The tandem platform accommodates tool-free tilt and height adjustment, as well as series-dependent depth and side settings via front locking devices and rear means. Lift off stops prevent drawer detachment by accident. Install using locking devices or a hook-and-peg system. Blum's EASY ASSEMBLY app, videos, drilling templates, and jigs help lead layout and tuning, allowing you to achieve tight reveals more quickly.
Planning for Fit & Cabinet Type
Make drawer box depth equal to runner length (e.g., 21 in. runners fit most 24 in. North American bases) plan for full or single extension. Specify the proper rear brackets or sockets for face frame cases; frameless enclosures mount directly. Most tandem SKUs feature bottom-mount holes, making mounting easier in standard carcass depths. Accessory family organizers, brackets, and templates complete the system.
Tandem, Deep, or Low Drawers
You don't have to work with narrow cutlery boxes. When well-planned, tandem runners provide rigid action in wide, high, deep, and even close-to-floor pullouts. Optional hardware side stabilisation is helpful when the drawer width exceeds its length. Technical specifications reference cabinet width recommendations, enabling you to design with confidence for vanities, pantries, recycling stations, and hall closets.
Designed for Service Life
Blum builds its runner systems, among them tandem, for a minimum of 100,000 open/close cycles in about 20 years of average household service. Nylon roller carriages spread out the Weight and minimize metal wear; zinc-plated steel parts provide corrosion resistance in steamy kitchens and baths. Accurate manufacturing offers the foundation for long service that cabinetmakers rely on.
Tandem or MOVENTO?
Make tandem your workhorse value: smooth operation, reliable soft close, extensive size range coverage, and decent load range for typical kitchen drawers. Upgrade to MOVENTO when you require more dynamic capacity, extended lengths, or newer four-way adjustment and pay a premium price. Tandem is also popular among many professionals for its thinner drawer boxes, as the front lock unit is smaller. Match product to application and budget.
Installation Tips That Save Time
Dry-fit the carcass and check opening widths before boring drawer parts; tandem tolerances are generous but not unlimited. The drilling template for bracket hole locations comes courtesy of Blum, and clip drawers onto runners before final front installation, allowing you to adjust gap lines with built-in adjustments to fine-tune. For face frames, always install rear brackets square; skewing them translates to racked action at full extension.
Maintenance & Quick Troubleshooting
If a tandem drawer is not smooth, ensure that the lock devices are correctly engaged and that nothing is stuck on the nylon rollers. Reset height or tilt if fronts wander following seasonal movement. Soft close lag? Ensure BLUMOTION actuators are clean and that the load is at the rated capacity; overloaded drawers will overwhelm the damping. Replacement parts, including lock devices, brackets, and TIP ON triggers, are stocked, so you seldom scrap an entire set of runners.
Quick Checklist
• Verify drawer side thickness and interior width for your tandem series.
• Select nominal length for cabinet depth.
• Select extension type and motion tech (BLUMOTION, SERVO DRIVE, TIP ON).
• Order proper locking devices / rear brackets for face frame vs. frameless.
• Check load rating against contents.
• Review latest Blum configurator data before machining.
Support That Helps You Finish
Blum supports tandem with a Product Configurator, CAD files, printed and PDF guides, mobile EASY ASSEMBLY instructions, and step-by-step videos. Utilise these tools to minimise rework, accelerate installations, and install aligned drawer fronts correctly the first time.
Final Word
If you desire drawers that open easily, close quietly, support actual loads, and maintain a clean appearance, the Blum tandem runner system is a worthy candidate for your next kitchen remodel. With hidden hardware, motion enhancements, durability testing, and comprehensive technical support, you can create cabinetry that lasts and is appreciated by customers daily.
