21022 and 164935 Dual Axial Probe
Housing Assembly
Datasheet

Bently Nevada Machinery Condition Monitoring141601 Rev. G

Description
The 21022 Dual Axial Probe Housing Assembly consists of two
proximity probes installed in an externally mounted
protective enclosure. It is intended for mounting on the end ofa machine nearest the thrust bearing to allow both probes toobserve the end of the shaft for axial thrust position
movement. The enclosure mounts on the machine caseusing four standard machine screws. The probes aremounted in sleeve/adapter assemblies, which are installed
directly onto the machine case through two 3/4-in NPT
threaded holes.
The dual axial position housing meets the American
Petroleum Institute’s (API) 670 Standard for axial thrust
position transducer housings. The external mounting allows
probe adjustments from outside the machine, while
protecting the proximity probes, probe leads, and extension
cables from dust, splashing liquid, or other environmental
factors. A removable cover on the enclosure provides accessfor setting the probe gaps.

21022 and 164935 Dual Axial Probe Housing Assembly
Datasheet

141601 Rev. G

SpecificationsMechanical
Housing Material
21022

Aluminum alloy housing (sand cast,0.3% copper free) with sleeves fabricatedfrom 304 stainless steel

164935

Stainless steel 316L housing with sleeves
fabricated from 304 stainless steel

Total
Housing
Weight(typical)

3.6 kg (8 lb)

Temperature Range-51°C to +177°C (-60°F to +351°F).
3300 XL 8mm or
3300 XL 11mm probe

Exposing the 3300 XL 8 mm or 11mm probe to temperatures
below -34°C (-30°F) may causepremature failure of the probe
pressure seal.

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141601 Rev. G
Minimum Length

Ordering Information
For the detailed listing of country and productspecific approvals, refer to the Approvals QuickReference Guide (108M1756) available from
Bently.com.

010

1.0 in (25 mm)
For all probes except 3300 XL 11mm012

1.2 in (30.5 mm)
For 3300 XL 11mm Probes

Maximum Length
120Standard version

For penetration lengths between 1.0 and 2.0inches, counter-bore may be required inmachine case to reduce probe side view
and/or rearview effects.

21022 - AA-BB-CCC-DD
A: Probe Option, with Connector
00

Probe not required

123300 XL 8 mm probe

183300 XL 8 mm, BASEEFA

233300 XL 8 mm, CSA

263300 XL NSv probe

273300 XL NSv Probe, Multiple approvals

283300 XL 8 mm probe, Multiple approvals

293300 XL 11 mm probe

303300 XL 11 mm probe, Multiple approvals

D: Fittings Option

B: Probe Cable Length Option
Probe cable not required05

0.5 metre (20 in)

10

1.0 metre (39 in)

1212.0 inches

1818.0 inches

2424.0 inches

30

30.0 inches

3636.0 inches

00

Without fittings

01

One 3/4-14 NPT fitting; three 3/4-14 NPTplugs02

Two 3/4-14 NPT fittings; two 3/4-14 NPTplugs

03

Two cable seal grips with grommets forcable sizes 1/8-in to 3/16-in, 1/4-in to
5/16-in, 5/16-in to 3/8-in;
two 3/4-14 to 1/2-14 NPT reducers

04

Three 3/4-14 NPT plugs
Fittings option -01 thru -04 are supplied as a
kit and are not installed when the housing isshipped.

If option 00 (probe not required) is selected
for Option A, then Option B (Probe Cable
Length Option) must also be 00.
00

12.0 in (305 mm)

3300 XL 11 mm Probe not available with 0.5
meter Probe Cable Length.
C: Probe Penetration Option
Probe penetration dimensions greaterthan 305 mm (12 in) require additional
sleeve support near the probe toprevent a resonance from occurring.
Sleeve adjustment range is ±13 mm(±0.5 in).
Order in increments of 0.1 in (2.54 mm)
for 21022; for UK0104, order inincrements of 0.5 in (13 mm).

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21022 and 164935 Dual Axial Probe Housing Assembly
Datasheet

141601 Rev. G

Stainless Steelplugs

164935 - AA-BB-CCC-DD
A: Probe Option, with Connector
00

Probe not required

123300 XL 8 mm probe

263300 XL NSv probe

273300 XL NSv Probe, Multiple approvals

283300 XL 8 mm probe, Multiple approvals

293300 XL 11 mm probe

303300 XL 11 mm probe, Multiple approvals

B: Probe Cable Length Option
Probe cable not required05

0.5 metre (20 in)

10

1.0 metre (39 in)
3300 XL 11 mm Probe not available with 0.5
meter Probe Cable Length.

C: Probe Penetration Option
Probe penetration dimensions greaterthan 305 mm (12 in) require additional
sleeve support near the probe toprevent a resonance from occurring.
Sleeve adjustment range is ±13 mm(±0.5 in).
Order in increments of 0.1 in (2.54 mm)
for 21022; for UK0104, order inincrements of 0.5 in (13 mm).
Minimum Length010

1.0 in (25 mm)
For all probes except 3300 XL 11mm012

1.2 in (30.5 mm)
For 3300 XL 11mm Probes

Maximum Length120

12.0 in (305 mm)
For penetration lengths between 1.0 and 2.0inches, counter-bore may be required inmachine case to reduce probe side view
and/or rearview effects.

D: Fittings Option00Without fittings

01

One 3/4-14 NPT fitting; three 3/4-14 NPT

Two 3/4-14 NPT fittings; two 3/4-14 NPTplugs

03

Two 3/4-14 NPT fittings; Two cable seal
grips with grommets for cable sizes 1/8in to 3/16-in, 1/4-in to 5/16-in, 5/16-in
to 3/8-in; Two 3/4-14 to 1/2-14 NPTreducers

04

Three 3/4-14 NPT plugs
Fittings option -01 thru -04 are supplied as a
kit and are not installed when the housing isshipped.

If option 00 (probe not required) is selectedfor Option A, then Option B (Probe Cable
Length Option) must also be 00.
00

02

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21022 and 164935 Dual Axial Probe Housing Assembly
Datasheet

141601 Rev. G

Spare 3300 XL 8mm Reverse Mount
Probe, 3/8-24 UNF threads

Accessories
Individual Sleeve

330105-02-12-CC-DD-EE

40467-0000-BBBB

C: Total Length Option
05

0.5 metre (1.6 feet)

B: Probe Penetration Length10

1.0 metre (3.3 feet)

A option from21022 or UK0104
Dual Axial
Housing partnumber15

1.5 metre (4.9 feet)20

2.0 metres (6.6 feet)50

5.0 metres (16.4 feet)90

9.0 metres (29.5 feet)

This option is the probe sleeve
length in 0.01 in. Only order thisoption in increments of 0.1 in (thelast digit of this option is always0).

All options

D: Connector Option

When the original housingpart number is known:
B = Probe penetration option
from original housing (21022option C) + 0160.

To determine theprobe
penetration
length -Connector not installed

02

Miniature ClickLoc coaxial
connector

E: Agency Approval Option

Example: original part number is21022-12-10-040-00. B option
for replacement sleeve is (0400 +0160) = 0560
When the original housingpart number is unknown:

00

Not Required

05

Multiple Approvals

Spare 3300 XL NSv Reverse Mount
Probe, 3/8-24 UNF threads

Measure the total probe sleevelength (do not include the probe
tip length). For option B, use thefollowing formula:

330906-02-12-CC-DD-EE

B = (total probe sleeve length) (2.4)

C: Total Length Option
05

0.5 metre (1.6 feet)

Example: Probe sleeve measures
6 inches long. B option for theindividual sleeve is (0600-0240)= 0360.

10

1.0 metre (3.3 feet)50

5.0 metres (16.4 feet)70

7.0 metres (22.9 feet)

D: Connector Option

Minimum Probe Sleeve Penetration LengthOption B00

All probes except NSv and 11mm:
2.6 in (66 mm)= 0260

00

Connector not installed

3300 XL Nsv: 2.7 in (69 mm)=
0270

02

Miniature ClickLoc coaxial connector

E: Agency Approval Option

3300 XL 11mm: 2.0 in (51m)=
0200
Maximum Probe Penetration Length
All probes: 13.6 in (345 mm) =1360

5/900

Not Required

05

Multiple Approvals

21022 and 164935 Dual Axial Probe Housing AssemblyDatasheet

141601 Rev. G

Spare 3300 XL 11mm Reverse Mount
Probe, 3/8-24 UNF threads
330705-02-18-CC-DD-EE
C: Total Length Option
10

1.0 metre (3.3 feet)50

5.0 metres (16.4 feet)90

9.0 metres (29.5 feet)

D: Connector Option
00

Connector not installed

02

Miniature ClickLoc coaxial connector

E: Agency Approval Option
00

Not Required

05

Multiple Approvals

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21022 and 164935 Dual Axial Probe Housing Assembly
Datasheet

141601 Rev. G

Graphs and Figures

Figure 1: 21022 Dual Axial Probe Housing Assembly Dimensions, Side View
Dimensions are in millimeters (inches).

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21022 and 164935 Dual Axial Probe Housing Assembly
Datasheet

141601 Rev. G

Figure 2: 21022 Dual Axial Probe Housing Assembly Dimensions, Top View
Dimensions are in millimeters (inches).

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21022 and 164935 Dual Axial Probe Housing Assembly
Datasheet

141601 Rev. G

Copyright 2020 Baker Hughes Company. All rights reserved.

Bently Nevada, Orbit Logo and Proximitor are registered trademarks of Bently Nevada, a Baker Hughes Business, in theUnited States and other countries. The Baker Hughes logo is a trademark of Baker Hughes Company. All otherproduct and company names are trademarks of their respective holders. Use of the trademarks does not imply any
affiliation with or endorsement by the respective holders.
Baker Hughes provides this information on an “as is” basis for general information purposes. Baker Hughes does notmake any representation as to the accuracy or completeness of the information and makes no warranties of any
kind, specific, implied or oral, to the fullest extent permissible by law, including those of merchantability and fitness
for a particular purpose or use. Baker Hughes hereby disclaims any and all liability for any direct, indirect,
consequential or special damages, claims for lost profits, or third party claims arising from the use of theinformation, whether a claim is asserted in contract, tort, or otherwise. Baker Hughes reserves the right to makechanges in specifications and features shown herein, or discontinue the product described at any time without
notice or obligation. Contact your Baker Hughes representative for the most current information.
The information contained in this document is the property of Baker Hughes and its affiliates; and is subject tochange without prior notice. It is being supplied as a service to our customers and may not be altered or its content
repackaged without the express written consent of Baker Hughes. This product or associated products may becovered by one or more patents. See Bently.com/legal.

1631 Bently Parkway South, Minden, Nevada USA 89423
Phone: 1.775.782.3611 or 1.800.227.5514 (US only)
Bently.com

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