MARAMETER 844 NH SELF-CENTRING DIAL BORE GAGE

Name: MARAMETER 844 NH SELF-CENTRING DIAL BORE GAGE
Brand: Mahr
SKU: 4475000

Code:

Measuring head consists of a carbide tipped moving anvil and an interchangeable stationary anvil with a carbide ball Transmission lever system transfers movement of movable anvil to indicating instrument The broad centering bridge ensures automatic centering in the bore Resistant to temperature bacause the shank and transfer rod are made of heat resistant Invar steel Highly resistant

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MARAMETER 844 NH / 844 N SELF-CENTRING DIAL BORE GAGE

Product Overview

The Mahr Marameter 844 NH and 844 N are high-precision self-centring dial bore gages designed for accurate internal diameter measurement. These instruments feature a modular design comprising a measuring head, holder, extensions, right-angle attachments, and depth stops. Engineered for stability and precision, the shank and transfer rod are constructed from heat-resistant Invar steel, ensuring the instrument remains insensitive to ambient temperature fluctuations and user body heat.

Key Features & Capabilities

Automatic Centring: The broad centering bridge ensures precise, automatic alignment within the bore.
High-Precision Transmission: A reliable lever system transfers the movement of the movable anvil directly to the indicating instrument.
Durable Construction:
844 NH: Features a carbide-tipped moving anvil and an interchangeable stationary anvil with a carbide ball.
844 N: Features a carbide-tipped moving anvil and an interchangeable stationary anvil with a hardened steel ball.
Thermal Stability: Shank and transfer rod manufactured from Invar steel, which possesses a low expansion coefficient.
Consistent Force: Built-in spring mechanism provides constant measuring force, eliminating user-induced measurement variations.
Modular Versatility: Designed for quick adjustment to any size within the specified measuring range.

Technical Specifications

Marameter 844 NH Series

Order No.	Measuring Range (inches)	Measuring Range (mm)	Distance of Movable Anvil (mm)	Repeatability fw (µm)	Error Limit Ge (µm)	Measuring Depth (mm)
4475000	.7 – 2"	18 – 50	1.3	0.5	2	115
4475001	1.4 – 4"	35 – 100	1.3	0.5	2	148
4475002	4 – 10"	100 – 250	1.6	0.5	2	230
4475003	10 – 16"	250 – 400	2.6	1.5	3	336
4475004	16 – 32"	400 – 800	2.6	1.5	3	336
4475005	10 – 32"	250 – 800	2.6	1.5	3	336

Marameter 844 N Series

Order No.	Measuring Range (inches)	Measuring Range (mm)	Distance of Movable Anvil (mm)	Repeatability fw (µm)	Error Limit Ge (µm)	Measuring Depth (mm)
4474000	.7 – 2"	18 – 50	1.3	0.5	2	115
4474001	1.4 – 4"	35 – 100	1.3	0.5	2	148
4474002	4 – 10"	100 – 250	1.6	0.5	2	230
4474003	10 – 16"	250 – 400	2.6	1.5	3	366
4474004	16 – 32"	400 – 800	2.6	1.5	3	366
4474005	10 – 32"	250 – 800	2.6	1.5	3	366