Adapters
All adapter assemblies can be ordered as a completed assembly with an encoder or separately as a kit.
All adapter kits will be provided with the necessary hardware to assemble the adapter onto the encoder only.
Please contact the factory for applications assistance in determining the proper adapter configuration for your system.
Hi-Load Bearing Assemblies
The high load bearing assem-
blies come in two styles: foot-
mounted and flange-mounted.
The foot-mounted version
mates to a 56C motor face
while the flange-mounted ver-
sion features a standard 4-hole
flange mount. The high load
bearing assemblies accommo-
date the H20D, H25D and H38D
square flange series encoders.
Optional shaft configurations
are available upon request.
Consult the factory.
HIGH LOAD
CAPACITY BEARING
FLEXIBLE COUPLING
H25D ENCODER
1.84
1.50
3/8-16UNC-2B
(4) ON A 5.875 Ø B.C.
Foot-mounted
.189
.187
FOR 3/16"
SQUARE KEY
.517
.602
6.00
.6247
.6244 Ø
3.500
±
.003
.34 W X.90 L SLOTS
(4) PLACES
3.000
4.50
6.00
1.000
2.50
6.75
2.50
Square Flange-mounted
H25D OR H20DB
ENCODER
2.93
0.38
0.38
COUPLING
2.00
±
0.03
1.00
4.00
0.04
0.6247
ø
0.6244
1.625
ø
1.624
BEARING
2.562
0.281
ø
(4)
CAST ALUMINUM
BEARING CARRIER
2.00
3.25 SQUARE
NEMA 23
The NEMA 23 flange mount
adapter allows for mating a
Model H20E with an F28 face
mount encoder to a standard
NEMA 23 motor frame.
2.00 Ø
1.75
0.38
ENCODER
SHAFT
1.25
0.20
0.10
2.110 Ø
1.381 Ø
1.378
0.171 Ø (3) EQUALLY
SPACED HOLES ON
A 1.862 Ø B.C.
MOTOR SHAFT
ENTRY 0.83 MAX
0.250
SM14 OR 16 = 1.52
SM18 = 2.06
COUPLING
Thermoplastic Adapter & NEMA 34/42
This thermoplastic adapter allows
easy mounting of either an H20E
with an F12 face mount or an H25E
with an F45 face mount.
Thermoplastic material provides
thermal and electrical isolation.
With the addition of the aluminum
NEMA 34/42 mounting ring, the
encoder will mount directly to a
NEMA 34/42 motor housing.
Regular or insulated couplings are
available. Consult the factory.
1.55
0.12
0.25
0.187 Ø ON
A 2.952 Ø B.C.
3.25
2.439
2.436
COUPLING
1.89
0.59
0.187 Ø ON
A 2.952 Ø B.C.
Adapter with
NEMA 34/42
Mounting Ring
COUPLING
3.25
NEMA 56
This adapter can be used to
mount an H25E with F1 face
mount, H25D, or H38D square
flange series encoder to a size
56 motor frame. The assembly
is provided with a flexible cou-
pling to accommodate a 5/8”
diameter shaft.
+
5.25 SQUARE
5.20
COUPLING SCREW
ACCESS PLUG
0.50
SHAFT
LENGTH
+
MOTOR
1.50
O-RING
SEALS
4.500 Ø
4.498
BOSS ON
MOTOR
+
+
INSULATOR
FLEX COUPLING
0.437 Ø THRU, (4)
ON A 5.875 Ø B.C.
DELRIN
INSULATOR
H20 Hub Shaft
This is also shown under the H20 model
description in the Specifying Guide
portion of this manual. The Hub
Shaft with flexmount is a versatile,
general purpose mounting that can
accommodate shafts from 1/4” up
to 5/8” readily in a compact package.
The flexmount kit includes mounting hardware
to assemble the flexmount to the encoder only.
HUB SHAFT (HBS)
H20 E with F28
END OF SHAFT TO FACE
= .50 MAX
4-40 UNC (3) ON A
2.250 BC
Flexmount
120°
1/4 THRU 5/8
DIA. (TYPICAL)
FLEXMOUNT
0.43
4-40 SCREWS (3)
ON 2.250 B.C.
5PY
This is a standard 5PY style
motor adapter. It comes in
aluminum or Delrin plastic
versions and can accommodate
a Model H20D, H25D square
flange encoder, or H25E with
three synchro-clamps (page 42).
1.28
0.25
0.060
4.62
DIA
2.499
2.496
DIA
0.50
2.50
0.91
0.97
0.281 Ø THRU
4 PLACES EQUALLY
SPACED ON A 3.972 B.C.
Adapter Ordering Information
HI-LOAD BEARING ASSEMBLIES
Foot-mounted NEMA 56C
H25D series part number 11009-001
H20D series part number 11009-002
H38D series part number 11009-003
Square-flange mount
H25D series part number 11008-000
H20D series part number 11008-003
H38D series part number 11008-004
NEMA 23 ADAPTER
H20 series part number 38229-001
Note: The NEMA 23 adapter kit can be ordered
with either a 1/4” or 3/8” inside diameter
coupling, please specify when ordering.
Couplings are ordered separately.
THERMOPLASTIC ADAPTER & NEMA 34/42
H20/H25 series part number 31170-001
H20/H25, NEMA 34/42 Kit 31170-003
Note: Includes adapter and mounting hardware only.
Couplings are available for shaft diameters from 1/4
to 1/2 inch. Couplings are ordered separately.
NEMA 56 ADAPTER
H25E series P/N (incl. Delrin Insul.) 11012-002
H25D series P/N (no Delrin Insul.) 11012-006
NOTE: H25 kits must specify 0.5” long shaft
H38D series P/N (incl. Delrin Insul.) 11012-003
H20 HUB SHAFT WITH FLEXMOUNT
Flexmount Kit part number 31134-001
5PY ADAPTER
Aluminum Adapter part number 38228-001
Delrin Adapter part number 38228-002
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