Electronics TSP-M, Instruction Manual

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Electronics Inc. • (574) 256-5001 • www.electronics-inc.com 5
The small side of the Zero Block is placed
on the gage. The reading is 0.000 mm.
Measuring the Pre-Bow of a New (Unpeened) Almen Strip
The following steps should be performed on the standard Almen strips and the mini-strips.
1. Push the ZERO/ON button to turn the gage “ON”.
2. Place the Zero Block on the gage with the indicator tip touching the small side of the block. Push the
ZERO/ON button to achieve 0.000 mm in the display.
3. Place a new (unpeened) Almen strip onto the measurement position. Be sure the strip touches the back
posts and is centered between the end posts.
4. Read and record the pre-bow (also called flatness).
5. Turn the strip over and measure the opposite side. If the reading from either side exceeds the specification
value, discard the strip. (See Table 1 for common examples of acceptable pre-bow).
Table 1. Examples of common industry Almen strip requirements for maximum pre-bow of unpeened strip
Specification Grade mm Inch
AMS2432, Shot Peening, Computer Monitored A1-S™, N1-S™ ±0.013 ±0.0005
AMS2430, Shot Peening A-1™, N-1™ ±0.025 ±0.0010
J442, Test Strip, Holder and Gage for Shot Peening A-1™, N-1™ ±0.025 ±0.0010
MIL-S-13165 Shot Peening of Metals (Canceled)
A-2™, N-2™ ±0.038 ±0.0015
An unpeened
mini-strip placed on
the mini-strip gage.
An unpeened
Standard Almen
strip placed on the
#2 Almen gage.