Peel Test Fixtures Guide: 90°, 180°, T-Peel, Floating Roller and Climbing Drum Peel Testing with a Mark-10
Updated: 7 days ago
Peel testing measures the force needed to separate a bonded layer from its substrate, and the fixture you choose decides whether that number is meaningful. A peel angle that drifts by even a few degrees changes the result, which is why tape, label, laminate and structural-adhesive standards each specify a fixed geometry. Universal Grip Company builds a complete family of peel fixtures for exactly that reason: 90°, 180°, T-peel, floating roller, climbing drum, tape-roll and credit-card peel, each matched to a published standard.
This guide walks through every peel fixture we offer, the standard each one supports, what it is best at, and how to pair it with a Mark-10 tensile tester. You will also find our YouTube walkthroughs, specimen and speed guidance, and a quick selection table so you can pick the right setup in a few minutes. If you only need a short answer, jump to the comparison table in the "How to choose" section.
Peel testing fundamentals
Peel strength is the average force held during steady peeling, divided by the width of the bond. It is reported as force per unit width: N/mm, N/100 mm, oz/in or lbf/in.
Peel strength = average peel force ÷ bond width
For example, a steady 15 N pull on a 25 mm wide strip gives 0.6 N/mm. To convert N/mm to lbf/in, multiply by 5.71. Our ASTM D1876 T-peel guide uses this same worked example.
Why peel angle matters
Peeling is an energy problem: the work done by the machine goes into breaking the bond. For a thin, inextensible backing, the force per width needed to advance the peel front depends on the angle θ between the peeled layer and the substrate:
G = (F ÷ w) × (1 − cos θ)
At 90° the cosine term is zero, so G equals F/w. At 180° the term (1 − cosθ) equals 2, so the same bond energy needs only about half the force per unit width, but only if the backing is perfectly inextensible. Real tapes stretch, bend and dissipate energy, so results taken at different angles are not interchangeable. That is the reason every standard locks the angle, and the reason a fixture must hold it for the entire test.
Reading the failure mode
The force number is only half the story. After each test, look at both surfaces and record the failure mode:
Adhesive failure: the bond separates cleanly at the adhesive/substrate interface, which usually points to surface preparation or surface energy.
Cohesive failure: the adhesive splits within its own layer, leaving residue on both surfaces, which points to the adhesive itself or its cure.
Substrate failure: the adherend tears or delaminates before the bond gives way, meaning the bond is stronger than the material.
Mixed failure: a combination, which is common and worth documenting with photos.
The Universal Grip peel testing guide covers how these results feed quality control, R&D, standards compliance and failure analysis across packaging, automotive, medical, electronics, aerospace and construction.
Why the Mark-10 is an economical way to peel test
A Mark-10 frame gives you constant-speed pulling and accurate force measurement at a fraction of the cost of a full-size universal testing machine. Peel forces are small. A 25 mm pressure-sensitive tape strip may peel at a few newtons, and even structural adhesive peels are usually well under the 5 kN class of a floor-standing frame. Paying for capacity you never use is the most common way labs overspend on peel testing.
Universal Grip supplies Mark-10 tensile testers in five capacities: 100 lb, 300 lb, 500 lb, 750 lb and 1,500 lb. For peel work, the 100 lb model is the natural starting point.
What keeps the cost down
Right-sized capacity. The 100 lb tester measures up to 100 lb (45 kg), is compact enough for one person to move, and is listed as well suited to peel testing and ASTM D3330 tape work. It is in stock and ships by parcel.
Low-cost software that still works. EasyMESUR runs from the machine touchpad and is the lowest-cost option, with a path to upgrade to IntelliMESUR (PC control and multi-phase tests) later. Software is sold à la carte, so you only buy what the lab needs.
Short-stroke or long-stroke. Short-stroke stands cost less and are enough for most peel tests. Long-stroke is there if you need long travel or high-elongation samples.
Matched load cells. Smaller load cells are available for low-force work, which improves resolution on delicate tapes and films.
Standard 3-year warranty and an adapter package that makes every model compatible with Universal Grip tensile grips, compression fixtures and peel fixtures, so the fixtures you buy today move with you to a bigger frame tomorrow.
Even lower-cost entry points
If you only need a spot check, our manual tensile testers run with a lever or hand wheel and can be adapted for ASTM D903 and D1876 peel work, with peel grips sold separately. A digital force indicator is optional and improves accuracy from about ±3% on the analog dial to about ±0.5%.
Why that matters for QC
An economical frame means a peel station can sit at the line, in the incoming-inspection area, or in each plant, rather than one shared machine at the end of a queue. When the same frame also handles tensile, tear, puncture and compression tests through the same adapter package, the cost is spread across every material test the lab runs. Ask us for a quote on your exact fixture and frame combination through our contact page.
90° peel fixtures
The 90° peel fixture is the right choice when the material you are peeling is bonded to a rigid substrate, such as a film, foil, tape or laminate on a metal, plastic or composite panel. The ASTM D6862 90-degree peel fixture uses a spring-loaded sliding table to keep the peel angle at 90° for the entire test. As the flexible layer is pulled upward, the rigid panel slides horizontally beneath it. Cables and pulleys that move the stage sit behind the load cell, so they do not add friction to the reading.
How the test runs
Specimen: 25 mm (1 in) wide bond, 150 mm (6 in) or longer, adhesive fully cured and free of bubbles or voids.
Conditioning: 23 ± 2 °C and 50 ± 5% RH, per the standard's conditioning time.
Speed: 254 mm/min (10 in/min) unless your specification calls for another rate.
Peel length: typically 75–100 mm of steady peeling, so the average is taken from the stable part of the curve.
Replicates: at least 3 to 5 specimens.
Load cell: a 1 to 5 kN frame is typical for structural adhesives, but pressure-sensitive materials peel at far lower force, so a small, high-resolution load cell on a Mark-10 frame is often the better fit.
Where it fits
Use the 90° fixture for structural adhesives, pressure-sensitive adhesives and laminates bonded to rigid substrates in aerospace, automotive, electronics, packaging and composite or metal bonding. It is also the better choice than a 180° setup when the backing is too stiff to fold back on itself. Related methods include ISO 8510-2 for rigid-to-flexible peel.
The economical 90° option for Mark-10 users
Universal Grip also offers an economical 90° peel system designed for Mark-10 frames. Pair it with the 100 lb tensile tester and you have a complete 90° peel station without moving up to a full-size universal testing machine. For other frame options, see our universal testing machines.
See also the full ASTM D6862 text and the fixture literature PDF. Pair the fixture with pneumatic grips or vise grips to hold the flexible end without slipping.
180° peel fixtures
The 180° peel fixture is the standard tool for pressure-sensitive tapes, labels and flexible laminates, because tapes grip most strongly at 180° and this geometry reports their maximum peel strength. Our ASTM D3330 180-degree peel fixture holds the test panel and lets the tape fold back on itself and peel at a constant angle, while the machine pulls the free end. The same hardware supports ASTM D903, the foundational method for peel and stripping strength of flexible adhesive bonds.
ASTM D3330 Method A at a glance
Panel – Standard stainless steel test panel
Specimen width – About 25 mm (1 in)
Peel length – About 150 mm
Roller – 2 kg, one pass forward and one back at 300 mm/min
Dwell time – 20 min ± 1 min before testing
Conditioning – 23 ± 2 °C, 50 ± 5% RH; tape at least 24 hours old
Test speed – 300 mm/min ± 10 mm/min
Data window – Force recorded over 125 mm after a 25 mm start-up distance
Result – Average force ÷ width × 100, reported in N/100 mm (or oz/in, lbf/in)
Load cell – 10 to 500 N range
ASTM D3330 defines methods A through F. ASTM D903 uses a default crosshead speed of 50 mm/min (2 in/min) and reports in lbf/in or N/mm.
Why 180° works so well on a Mark-10
This is the Mark-10 sweet spot. A tape peel is a low-force test, usually well inside the range of the 100 lb tester, which our product page lists for ASTM D3330 tape work. Most of the cost in a tape lab sits in the fixture, roller, panels and a repeatable procedure, not in capacity.
Related tape fixtures
ASTM D3811 tape-roll peel fixture: the roll mounts on a spinning mandrel (standard 3 in inner diameter, other sizes available) and the tape end is pulled from the top grip to measure peel strength for the entire roll. DIN 53357 covers other roll sizes.
ASTM D6195 loop tack fixture: for tack rather than peel; see the loop tack fixture page.
ASTM F88 seal strength: peel testing of flexible barrier seals; see the F88 page.
Download the ASTM D3330 standard PDF or the ASTM D903 literature. For humidity or temperature control, add an environmental chamber.
T-peel and floating roller peel fixtures
T-peel is for flexible-to-flexible bonds, and the floating roller is for a flexible skin bonded to a rigid or semi-rigid panel. Both are common in structural adhesive work, and they need different hardware.
T-peel (ASTM D1876)
In a T-peel, two flexible adherends are bonded with unbonded tabs at each end. The tabs are clamped in the upper and lower grips and pulled apart, forming a "T". Because the specimen peels itself, no dedicated angle fixture is needed. What matters is grip quality and alignment. Universal Grip recommends vise grips or pneumatic grips with rubber or serrated faces, and optional guide rollers or low-friction supports for long samples.
Specimen: 25 mm wide, with enough bond length for at least 127 mm (5 in) of peel travel.
Speed: 254 mm/min (10 in/min) unless specified.
Conditioning: 23 ± 2 °C and 50 ± 5% RH for at least 24 hours.
Applications: laminated pouches, peel-open seals, sterile medical packaging, automotive interior bonding, wearables and flexible electronics, and flashing tapes.
See the full ASTM D1876 T-peel page and the standard PDF. The related ISO method is ISO 11339.
Floating roller peel (ASTM D3167)
The ASTM D3167 floating roller peel fixture holds the rigid or semi-rigid board with the tape or flexible adherend facing down. The flexible member loops under a free-floating roller and is pulled through the center at roughly 90°. The roller follows the peel front, which reduces bending stress in the adherend and keeps the angle constant. It is the right method for high-strength adhesives where a 180° test (ASTM D903) would deform the substrate or generate excessive peel force. The fixture also supports related methods including DIN 53289, EN 1464 and ISO 4578.
Load cell: typically 500 N to 5 kN, at a constant 254 mm/min.
Specimen: 25.4 mm wide, at least 127 mm of peel length, bondline thickness controlled and recorded.
Typical uses: structural adhesives in aerospace and automotive, metal foil bonded to composites or rigid plastics, and durability testing after heat, humidity or salt spray exposure.
Download the D3167 standard and fixture literature.
Climbing drum and specialty peel fixtures
When the standard geometries do not fit your product, Universal Grip has purpose-built fixtures for sandwich panels, whole tape rolls and plastic cards.
Climbing drum peel (ASTM D1781)
The ASTM D1781 climbing drum peel fixture tests the adhesive in sandwich core composites such as honeycomb panels, thermoplastic composites and aircraft fuselage panels. The drum is the bottom grip and a vise grip is the top grip, pulling the flexible facing vertically so it wraps around the drum as the drum climbs. It can also test tapes, though that is less common.
Specimen: about 25.4 mm wide and 203–305 mm (8–12 in) long; at least 5 specimens recommended.
Speed: 50.8 mm/min (2 in/min).
Data: discard the first and last 1 in of the peel before averaging.
Watch for: drum misalignment (asymmetric peel), poor surface prep (early failure) and grip slippage (invalid data).
Frame: a 1–10 kN universal testing machine with constant crosshead speed control.
Pair it with our universal testing machines. Download the D1781 standard and literature.
Tape roll peel (ASTM D3811)
This fixture measures the peel strength of an entire tape roll. The roll mounts on a spinning mandrel and the tape end is pulled from the top grip. Standard rolls have a 3 in inner diameter, and other sizes (including DIN 53357 configurations) are available. See the full peel grips and fixtures page for the cut sheet.
Credit card peel (ISO 10373)
Credit and ID cards often carry adhesive stickers for logos, PIN numbers and signature panels. The ISO 10373 fixture tests the peel strength of those adhesive elements. It is a niche test, but a useful one for card manufacturers and personalizers.
Other related options
Variable motorized fixture: for adjustable-angle peel work; contact us for current configurations.
Loop tack: the ASTM D6195 loop tack fixture for tack rather than peel.
Heat seal and package seals: see ASTM F88.
Testing services: if you would rather outsource the work, we also offer testing services.
Peel test video walkthroughs
Every major peel fixture has a demonstration on The Universal Grip Company YouTube channel. Watching a fixture run is the fastest way to see specimen mounting, roller setup and how the force curve builds. Subscribe to catch new fixture and machine videos as we publish them.
ASTM D6862 – 90 Degree Peel Test Fixture – 90° peel – ASTM D6862
Demonstration of ASTM D3330 – 90 degree Peel Test fixture – 90° peel setup – ASTM D3330
ASTM D3330 180 degree peel test fixture – 180° peel – ASTM D903
ASTM D1876 Adhesives T-Peel Testing Grip – T-peel – ASTM D1876
How to Perform ASTM D3167 Floating Roller Peel Test – Floating roller – ASTM D3167
ASTM D3811 – Slow Tape Unwind Test – Tape roll peel – Peel fixtures
Manual Force Tester Demo – Manual force testers – Tensile testers
How to choose the right peel fixture
Start with what is bonded to what, then match the standard. Flexible-to-rigid bonds point to 90°, 180° or floating roller; flexible-to-flexible bonds point to T-peel; tape and labels point to 180°.
Pressure-sensitive tape or label on a steel panel – 180° peel – ASTM D3330 – 300 mm/min – Mark-10 100 lb
Flexible adhesive bond, film or laminate – 180° peel – ASTM D903 – 50 mm/min – Mark-10 100 lb or 300 lb
Film, foil or laminate on a rigid panel – 90° peel – ASTM D6862 – 254 mm/min – Mark-10 100 or 300 lb
Two flexible adherends (pouches, seals, laminates) – T-peel grips – ASTM D1876 – 254 mm/min – Mark-10 100 or 300 lb
Flexible skin on rigid panel, structural adhesive – Floating roller – ASTM D3167 – 254 mm/min – 300 lb to 500 lb
Honeycomb or sandwich core panel – Climbing drum – ASTM D1781 – 50.8 mm/min – Universal testing machine (1–10 kN)
Whole roll of tape – Tape-roll peel – ASTM D3811 – Per method – Mark-10 100 or 300 lb
Credit or ID card – Card peel – ISO 10373 – Per method – Mark-10 100 or 300 lb
Frame suggestions are starting points. Confirm force range against your expected peel strength and specimen width, and ask us to size the load cell for your product.
Test setup, best practices and common mistakes
Most bad peel data comes from specimen preparation and alignment, not from the machine. Work through this sequence on every peel test.
Select the method. Confirm the standard, speed, specimen width and conditioning your customer or specification calls for.
Prepare the specimen. Cut clean, straight edges at the specified width (usually 25 mm). Keep bonding conditions consistent, fully cure structural adhesives, and avoid bubbles or voids in the bondline.
Condition it. Hold specimens at 23 ± 2 °C and 50 ± 5% RH for the time the standard requires (24 to 40 hours depending on the method). For other temperatures or humidity, use an environmental chamber.
Set up the machine. Size the load cell so the expected peel force falls in the middle of its range, set the crosshead speed, and zero the force reading with the fixture installed.
Mount and align. Keep the flexible member in line with the load axis and make sure the sliding table, roller or drum moves freely. Use pneumatic grips or vise grips with rubber or serrated faces to prevent slip.
Run and record. Capture force against displacement for the whole test. Discard start-up and end effects and average over the steady-state region.
Report. Give average, minimum and maximum peel strength, failure mode (with photos), speed, angle, environment, adhesive and adherend details, and the number of replicates.
Common mistakes
Grip slippage: shows up as a saw-tooth force trace that looks like stick-slip peeling but is really the specimen sliding in the jaws.
Peel angle drift: a fixture that does not keep the angle constant (or a sample that curls) changes the result. This is the main reason to use a dedicated fixture rather than hand-holding the panel.
Too few replicates: use at least 3 to 5 specimens, and 5 or more for climbing drum.
Wrong load cell: a cell that is too large gives poor resolution on low-force tape peels, while one that is too small can be overloaded by a structural bond.
Ignoring failure mode: a good average with mixed or substrate failure can still mean the bond is out of spec.
Out-of-date calibration: check the force measuring system on a schedule, and see our calibration services.
Mark-10 machines and related equipment
A peel station is a frame, a load cell, software, grips and a fixture, and Universal Grip supplies all of them.
Mark-10 tensile testers: the 100 lb for tapes, labels and films; the 300 lb when you also run tensile, flexure and puncture; the 500 lb, 750 lb and 1,500 lb for stronger bonds. Compare them all on the tensile testers page.
Manual testers: for low-volume work, see manual tensile testers from 30 lb to 2,000 lb, with optional digital force indicators.
Software: EasyMESUR (touchpad, lowest cost) or IntelliMESUR (PC control, multi-phase tests), sold à la carte.
Larger frames: universal testing machines for climbing drum and high-force structural peel.
Grips: tensile grips, vise grips and pneumatic grips.
Adapters and accessories: adapters, accessories and compression fixtures.
Conditioning and service: environmental chambers, calibration and testing services.
Application guides: the peel testing guide, adhesives industry guide and the full application library.
All Mark-10 testers carry a standard 3-year warranty. For tear testing on the same frame, see our guide to ASTM D624 tear strength with a Mark-10.
Frequently asked questions
What is the best fixture for pressure-sensitive tape? A 180° fixture per ASTM D3330, because tapes grip hardest at 180° and this geometry reports their maximum peel strength.
When should I use 90° instead of 180°? Use 90° peel when the material is bonded to a rigid substrate or is too stiff to fold back on itself.
Can I do peel testing on a small Mark-10 frame? Yes. Peel forces are low, and the 100 lb Mark-10 tester is listed for peel and ASTM D3330 work. Larger frames are only needed for strong structural bonds.
T-peel or floating roller? T-peel is for two flexible adherends. The floating roller is for a flexible skin on a rigid or semi-rigid panel.
How many specimens should I test? At least 3 to 5. Climbing drum testing recommends at least 5.
Can I use my existing machine? Often yes. Our adapter package makes our Mark-10 testers compatible with Universal Grip fixtures, and many fixtures fit other frames. Contact us with your machine model.
Get a peel testing quote
Tell us the standard, specimen size and expected peel force, and we will recommend the fixture, grips, load cell and Mark-10 frame. Request pricing and availability through our contact page, browse every peel fixture, or watch more demonstrations on our YouTube channel.
Testing an adhesive bond in shear instead of peel? See our guide to lap shear vs block shear testing with ASTM D1002, D905 and D4501.
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