14.4V Mechanical Pulse Tool Wrench EYFMA1J / EYFMA1B / EYFMA1JR

14.4V Mechanical Pulse Tool Wrench EYFMA1J / EYFMA1B / EYFMA1JR

Cordless Mechanical Pulse Tool
Chuck Size 12.7mm Square Drive
Pin-hole type
12.7mm Square Drive
Ball type
Application M10 bolt (Tensile bolt)
M12 bolt (Normal-Tensile bolt)
M14 bolt (Normal bolt)
Maximum torque (F mode, fastening 3 sec.) approx.185 N·m (M16 bolt)
Torque control function operating range approx. 25—100 N·m
Torque Setting 30 stage + F (without torque setting mode)
Flush Detection Mode Applications L1: For lighter loads during fastener run down
L2: For prevailing torque during run down and varying joint rate applications
No load speed (unit : rpm) 0 ~ 2300
Impact per minute 0 ~ 3200
(inc. battery)
EYFB40B approx. 1.5kg
EYFB41B approx. 1.3kg
Size Length 172mm
Height 248mm (EYFB40B), 231mm (EYFB41B)
Width approx. 59mm (Width of battery pack: approx. 75mm)
Function Wireless Communication EYFLA6JR only
with assembly qualifier
(OK fastening: Green lamp,
NOK fastening: Red lamp)
LED Light X
(ON/OFF switch, Light off after five minutes automatically)
Tightening confirmation lamp X
(OK fastening: Green lamp, NOK fastening: Red lamp)
Retightening Prevention Function X
(Possible to set between 0 ~ 3sec.. 0.1 sec. per stage)
Battery indication lamp X
(3 stage)
Auto-Power Stop function X
Application Capacity/ Working Speed approx. 550 pcs/pack
approx. 0.9 sec/1pcs (EYFB40B)
approx. 350 pcs/pack
approx. 0.9 sec/1pcs (EYFB41B)
<M12: 71 N·m, Stage: 22>
Charging time

Usable Charge: approx. 40 min.
Full Charge: approx. 55 min (Battery pack EYFB40B, Charger EY0L82B)
Usable Charge: approx. 35 min.
Full Charge: approx. 40 min (Battery Pack EYFB41B, Charger EY0L82B)

*1 Weights are described in 0.05kg increment.
There are models limited to particular region.
Battery pack is not included.

Assembly Qualifier EYFR02B

The Panasonic EYFR02B is a single tool controller for communicating to Panasonic’s wireless assembly tools. The simple design provides the operator a clear visual and audio feedback, informing the operator of a pass or fail fastening strategy. Connecting the I/O to line stops or a PLC enables additional error proofing capabilities; reducing defects, increasing overall productivity and product quality which leads to a money savings.

Battery pack EYFB40B, EYFB41B

  • 14.4V Li-Ion battery pack
  • EYFB40B: High capacity 3.3Ah
  • EYFB41B: Light weight 2.0Ah

Charger EY0L82B

  • Charger EY0L82B for all 10.8 - 28.8V batteries

Remote control EYFA31B

Protector for Battery EYFB40B / EYFB41B

  • EYFA04-H (gray) for battery EYFB40B
  • EYFA06-H (gray) for battery EYFB41B

Protector for Tool EYFLA / EYFMA

  • EYFA01-A (blue)
  • EYFA01-Y (yellow)
  • EYFA01-H (gray)
  • EYFA01-G (green)

Product downloads


Description Release date File size Language
Catalogue Assembly Tools 2019-05-30 33.99 MB English
Katalog Montagewerkzeuge 2017-09-30 5.24 MB German

Operating Instructions

Description Release date File size Language
Operating Instructions Assembly Qualifier EYFR02 2012-11-01 4.19 MB Multilanguage
Operating Instructions Cordless Impact Driver/Cordless Impact Wrench EYFLA4A / EYFLA4AR / EYFLA5A / EYFLA5AR / EYFLA5Q / EYFLA5QREYFLA5B / EYFLA6J / EYFLA6JREYFLA6B / EYFMA1J / EYFMA1JR / EYFMA1B 2013-01-01 20.9 MB Multilanguage
Appendix to operating instruction, CE sheet EYFMA1J / EYFMA1B 2022-02-15 710.74 KB Multilanguage