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Pointer-type vernier caliper with open‑type single‑direction claw jaws (long‑reach extended claws)

Name: Pointer-type vernier caliper with open‑type single‑direction claw jaws (long‑reach extended claws)
Brand: Laibote (Tianjin) Testing Machinery
Availability: InStock

The open‑type, single‑jaw caliper features an open‑frame design and a unidirectional jaw, specifically engineered for measuring the outer diameter, thickness, and other dimensions of large, elongated workpieces.

Category:

Glassware and Measuring Instruments

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E-mail:

lbt@lbt.ltd

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+86-15102211717

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Pointer-type vernier caliper with open‑type single‑direction claw jaws (long‑reach extended claws)

Description

Product Introduction:

The open‑type, single‑jaw caliper features an open‑frame design and a unidirectional jaw, specifically engineered to measure the outer diameter, thickness, and other dimensions of large, elongated workpieces. Its body is crafted from stainless steel, offering excellent rigidity, wear resistance, clear graduations, smooth sliding action, and stable measurements.

The open‑frame design facilitates cleaning and maintenance, making it well suited to harsh workshop environments. The single‑direction long jaws can reach deep into workpieces or measure at remote locations, addressing measurement scenarios that conventional calipers cannot access. Equipped with a locking mechanism, it allows readings to be secured for convenient re‑inspection and record‑keeping.

Product Applications:

It is widely used for large‑size, long‑distance, and deep‑dimensional measurements in industries such as machining, mold making, hardware, pipe manufacturing, and sheet metal fabrication.

Technical Specifications:

Parameter	Specification Description
Range	0–500 mm, 0–600 mm, 0–1000 mm
Graduation value	0.02mm
Accuracy	±0.05 mm (for a range of 0–500 mm)
Main material	Stainless steel
Scale craftsmanship	Laser scale
Applicable temperature	0–40℃

The reading principle of a vernier caliper:

The reading mechanism of a vernier caliper consists of a main scale and a vernier scale. When the movable jaws are brought into contact with the fixed jaws, the “0” mark on the vernier scale aligns with the “0” mark on the main scale, at which point the distance between the jaws is zero. As the slide is moved to the left to a certain position, the distance between the fixed and movable jaws corresponds to the measured dimension of the part. The integer portion of the dimension can be read from the main‑scale markings to the right of the vernier’s zero line, while the fractional part—less than 1 mm—can be determined by reading the vernier scale.

How to read a vernier caliper:

The reading of a vernier caliper consists of the integer part in millimeters and the decimal fraction in millimeters. The method for taking the reading is as follows:

(1) Integer part: Starting from the first graduation line on the main scale to the left of the vernier zero mark, read the integer portion in millimeters.

(2) Decimal part: The decimal portion in millimeters is obtained by multiplying the number of scale divisions on the vernier scale that align with a particular division on the main scale by the instrument’s least count. If no vernier scale division exactly coincides with a main‑scale division, and the reading falls between two values—one larger and one smaller—take the average of the corresponding least‑count increments.

(3) Determine the measured value by addition: Add the integer part of the millimeter measurement to its decimal part; the result is the measured dimension of the workpiece.

Measurement range mm	Division value mm	Indication/week mm	Accuracy mm	L mm	a mm	d mm	e mm	f mm
0-500	0.02	2	±0.05	650	90	21	10	18
10-500	0.02	2	±0.05	650	90	21	5	18
10-600	0.02	2	±0.05	750	90	21	5	18
0-600	0.02	2	±0.05	750	90	21	10	18
0-1000	0.02	2	±0.07	1190	150	28	10	24

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FAQs

Do you supply full-set testing instruments for asphalt and geotechnical engineering projects?

We offer complete lab solutions including asphalt viscosity tester, asphalt rutting tester, geotextile permeability tester, low-temperature flexibility tester and concrete/cement test equipment, covering raw material detection for road, water conservancy and construction engineering projects

Can you customize fixtures or test machines based on our special test requirements? How about after-sales service and warranty?

We provide non-standard customization of test equipment and customized fixture clamps according to customers’ specimen size and test standards. All our testing machines enjoy 12-month factory warranty; overseas customers get remote online debugging guidance, spare parts supply and technical operation training. Our products have been exported to over 70 countries globally

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Does your pipe pressure burst testing machine control test temperature automatically? What’s its main application?

Yes, the constant-temperature circulating system keeps stable test environment during long-time hydrostatic resistance and instant burst pressure measurement of thermoplastic pipes. It complies with GB6111 standard and serves raw material inspection, new product R&D for plastic pipe manufacturers, third-party testing labs and university laboratories.

What kinds of pipes fit your ring stiffness tester? Can it do long-term creep testing?

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What test items can your WDW series computer-controlled electronic universal testing machine complete? Which international standards can it meet?

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From Thomas Bennett, Quality Director, UK plastic pipe factory

2026.06.05

★★★★★

“We have purchased two sets of pipe testing equipment from Laibote (Tianjin) for 18 months. The ring stiffness and hydrostatic burst testing machines run stably for daily batch inspection, test data matches ISO standard requirements precisely, and the intelligent test software is easy for our operators to master. Their after-sales team offers timely remote technical guidance whenever we have operational problems, spare parts supply is efficient. We have arranged a second bulk order for our new production workshop and will recommend Laibote’s testing machines to our industry partners across Europe.”

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