Bernardo Lever Shrinker and Strechter SS 20
The Bernardo Lever Shrinker and Strechter SS 20 is the tool for shaping edges and radii on sheet metal without cuts or welds. Thanks to its robust lever and extra-long 245 mm throat depth, it allows you to work comfortably on deep parts while maintaining control and repeatability. The standard equipment includes 1 shrinking attachment and 1 stretching attachment, so you can quickly switch between creating concave and convex curves. The solid body and weight of 24 kg ensure stability during use, while the jaws are optimized for steel up to 1.5 mm (400 N/mm²) and aluminum up to 1.8 mm. Compact in the workshop, yet powerful in operation, the SS 20 is ideal for bodyworkers, makers, and sheet metal professionals who demand precision, durability, and versatility.
Key features
🧰 Equipment: 1 stretching attachment + 1 shrinking attachment
🛠️ Steel up to 1.5 mm (400 N/mm²)
🪙 Aluminum up to 1.8 mm
📏 245 mm throat depth for deep parts
📐 Dimensions: 375 × 150 × 380 mm
⚖️ Weight: approx. 24 kg for maximum stability
🔁 Quick change between shrink/stretch functions
🧱 Robust lever structure for intensive use
Technical specifications
| Specification |
Value |
| Brand |
Bernardo |
| Model |
Shrinker & Strechter SS 20 |
| Workable materials |
Steel ≤ 1.5 mm (400 N/mm²) / Aluminum ≤ 1.8 mm
|
| Throat depth |
245 mm |
| Width |
375 mm |
| Depth |
150 mm |
| Height |
380 mm |
| Weight |
≈ 24 kg |
| Included accessories |
1 for stretching, 1 for shrinking |
Standard equipment
Bernardo SS 20 device
1 stretching attachment
1 shrinking attachment
User manual
Logistics
Bernardo shipping: 5–9 business days (7 days in Southern Italy). Original spare parts available with 3–5 business days shipping. Customer support in Italian available.
Frequently asked questions
What does a shrinker do and what does a stretcher do?
The shrinker compresses the metal fibers at the edge, shortening it and creating a concave curve. The stretcher elongates the fibers by expanding them, creating a convex curve. By alternating between the two functions, complex shapes can be achieved on thin sheet metal without wrinkles or tears. An essential tool for bodyworkers, boat builders, and vehicle restorers.
What sheet metal thicknesses can the Bernardo Shrinker and Strechter SS 20 handle?
Bernardo shrinkers/stretchers typically work steel up to 1.2–2.0 mm and aluminum up to 1.5–2.5 mm, depending on the model. Please check the specific limits in the technical table for the Bernardo Shrinker and Strechter SS 20. Exceeding the limits will cause damage to the tools and irregular deformation of the workpiece.
What is the difference between lever, foot-operated, and motorized versions?
The lever (Pro) version is manual: the operator activates the lever with both hands, ideal for occasional jobs. The foot-operated (FD/F) version operates the machine with the foot, freeing both hands to hold and guide the workpiece — more comfortable for repetitive tasks. The motorized or electric version automates the entire cycle for series production.
Do the jaws wear out? Are spare parts available?
Yes. The jaws of shrinkers/stretchers wear out after prolonged intensive use. Original Bernardo spare jaws are available with 3–5 business days shipping. Replacement does not require special tools.
Does it also work on copper and brass?
Yes. Copper and brass are more ductile materials than steel: the effective capacity is higher compared to mild steel. For specific alloys, please check thickness limits with Krollit. Customer support in Italian available.
