MS20221 - Spec. No. MIL-DTL-7034/3
Dimensions and Interface Characteristics
Dash No. |
Cable
Size
(REF)
(Inches) |
A |
B |
C |
D |
E |
Nonmetallic
Sheave
MS20221 |
Metallic
Sheave
MS20221 |
Outside
Dia.
± .005 |
Groove
Dia.
± .005 |
Shoulder
Dia.
(approx) |
Bore
Dia.
+.0000
-.0005
|
Width
I.R.
+.000
-.005
|
| |
A1 |
3/16
7/32
1/4 |
2.625 |
2.000 |
.455 |
.3125 |
.625 |
-2 |
A2 |
4.125 |
3.500 |
.768 |
.5000 |
.750 |
-3 |
A3 |
5.625 |
5.000 |
Dash No. |
F |
G |
H |
I |
Pulley
Assembly
Max.
Weight
(LBS) |
ABMA
Bearing
(REF) |
|
Nonmetallic
Sheave
MS20221 |
Metallic
Sheave
MS20221 |
Material
Width |
Groove
Width
+.000
-.020 |
Groove
Rad.
+.000
-.005 |
+.000
-.010 |
|
|
|
|
| |
A1 |
.507
MAX. |
.360 |
.130 |
.085 |
.165 |
PD5K |
|
-2 |
A2 |
.450 |
P8 |
|
-3 |
A3 |
.680 |
|
Dash No. |
Pulley Strength |
|
Nonmetallic
Sheave
MS20221 |
Metallic
Sheave
MS20221 |
Allowable
Limit
Load
(LBS) |
Max limit load on cable
independent of wrap angle. |
|
|
|
3/16 |
7/32 |
1/4 |
|
| |
A1 |
2800 |
2620 lbs. |
3060 lbs. |
3500 lbs. |
|
-2 |
A2 |
4900 |
|
-3 |
A3 |
7000 |
|
Materials
Nonmetallic Sheave – Specially formulated grade C laminated phenolic.
Metallic Sheave – Aluminum alloy 2024-T351. Aluminum sheaves are anodized per MIL-A-8625, Type II, Class I.
Bearing Retention Sleeve - Aluminum alloy 6061-T6.
Bearing - Conforming to the requirements of AS7949 and AS21443.
Lubrication - Grease conforming to MIL-PRF-81322 or MIL-PRF-23827.
Requirements
Military standard pulleys are manufactured to the requirements of MIL-DTL-7034 and MIL-DTL-7034/3.
Intended Use
These pulleys are used in aircraft applications, such as control systems and brake installations. These military unique parts of aircraft control and brake systems require interoperability and compatibility with associated components and equipment. This interoperability and compatibility has been assured through the strict adherence to military requirements which contain substantial detail. The detail assures item standardization and compatibility through specific dimensions and tolerances in the MIL-DTL-7034 specification sheets and material control requirements in this specification. The qualification process ensures these items will meet the flame resistance, and
-65° to 250°F temperature requirements, and perform as specified in the environments to which they may be subjected. Users and prime equipment manufacturers depend on these detailed technical requirements to ensure delivered product meets the interoperability and compatibility requirements.
Disclaimer: The information presented is believed to be correct as of the date of publication and is subject to change without notice. It is not intended to substitute original drawings, standards and specification documents.
Ralmark Company
PO Box 1507
Kingston, PA 18704-0507
Phone: 570-288-9331
Fax: 570-288-0902
sales@ralmark.com
