Hold-Down and Release Mechanisms (HDRMs)

Hold-Down and Release Mechanisms (HDRMs)

High-Reliability, Non-Explosive (split-spool) Separation Nuts and Electromechanical Release Mechanisms for Dependable Preload Stowage and Release of Deployable Satellites and Space Systems

Series 06 (North America)Series GSS (Europe)

Glenair HDRMs are optimized for foolproof near-simultaneous release reliability with built-in electrical redundancy. The planned release of deployable satellites and structures is activated by a pre-determined electrical current to a fuse-wire system which causes the wire to break under tension and allows a pre-loaded mechanical bolt to actuate. Glenair’s line of low-shock, redundant and non-redundant space mechanims includes both HDRM devices as well as a family of lightweight pin pullers. Customer-defined electrical initiation (with no amperage max limit), as well as custom housing, pin pusher designs, and mounting configurations are available. Consult factory for specific device TR level and qualification test reports.

Hold-Down and Release Mechanisms (HDRMs)
  • Pyrotechnic-free (low-shock with fuse-wire) for single-event release of deployable space systems—configurable electrical initiation with no (amperage) upper limit
  • Single-event device, user-serviceable and refurbishable
  • Redundant or non-redundant actuation circuit
  • Not susceptible to transient and noise (EMI/EMP/ESD/RFI) inputs
  • Extended temperature ranges: -150°C to +150°C

Reference

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Space Mechanisms > HDRMs

Light-Duty HDRMs

Light-Duty HDRM, 061-014
061-014
Light-Duty HDRM
Side-load, Non-Redundant Circuit
24 lb Release Preload

Medium-Duty HDRMs

Medium-Duty HDRM, 061-017
061-017
Medium-Duty HDRM
Low-Profile, Non-Redundant Circuit
300 lb Release Preload
Medium-Duty HDRM, 061-007
061-007
Medium-Duty HDRM
Redundant Circuit
300 lb Release Preload
Medium-Duty HDRM, 061-025
061-025
Medium-Duty HDRM
Metric Thread, Redundant Circuit
600 lb Release Preload
Medium-Duty HDRM, 061-037
061-037
Medium-Duty HDRM
90° Bend, Redundant Circuit
600 lb Release Preload
Medium-Duty HDRM, 061-033
061-033
Medium-Duty HDRM
Harnessed, Redundant Circuit
600 lb Release Preload
Medium-Duty HDRM, 061-006
061-006
Medium-Duty HDRM
Redundant Circuit
1000 lb Release Preload
Medium-Duty HDRM, 061-024
061-024
Medium-Duty HDRM
Metric Thread, Redundant Circuit
1000 lb Release Preload
Medium-Duty HDRM, 061-036
061-036
Medium-Duty HDRM
90° Bend, Redundant Circuit
1000 lb Release Preload
Medium-Duty HDRM, 061-029
061-029
Medium-Duty HDRM
Connectorized, Redundant Circuit
1000 lb Release Preload
Medium-Duty HDRM, 061-032
061-032
Medium-Duty HDRM
Harnessed, Redundant Circuit
1000 lb Release Preload
Medium-Duty HDRM, 061-005
061-005
Medium-Duty HDRM
Redundant Circuit
2500 lb Release Preload
Medium-Duty HDRM, 061-023
061-023
Medium-Duty HDRM
Metric thread, Redundant Circuit
2500 lb Release Preload
Medium-Duty HDRM, 061-035
061-035
Medium-Duty HDRM
90° Bend, Redundant Circuit
2500 lb Release Preload
Medium-Duty HDRM, 061-028
061-028
Medium-Duty HDRM
Connectorized, Redundant Circuit
2500 lb Release Preload
Medium-Duty HDRM, 061-031
061-031
Medium-Duty HDRM
Harnessed, Redundant Circuit
2500 lb Release Preload
Medium-Duty HDRM, 061-022
061-022
Medium-Duty HDRM
Redundant Circuit
4000 lb Release Preload
Medium-Duty HDRM, 061-034
061-034
Medium-Duty HDRM
90° Bend, Redundant Circuit
4000 lb Release Preload

Heavy-Duty HDRMs

Heavy-Duty HDRM, 062-002
062-002
Heavy-Duty HDRM
Redundant Circuit
5000 lb Release Preload
Heavy-Duty HDRM, 062-004
062-004
Heavy-Duty HDRM
90° Bend, Redundant Circuit
5000 lb Release Preload
Heavy-Duty HDRM, 062-006
062-006
Heavy-Duty HDRM
Redundant Circuit
6500 lb Release Preload
Heavy-Duty HDRM, 063-001
063-001
Heavy-Duty HDRM
Redundant Circuit
8750 lb Release Preload
Heavy-Duty HDRM, 063-004
063-004
Heavy-Duty HDRM
Redundant Circuit
8750 lb Release Preload
Heavy-Duty HDRM, 064-001
064-001
Heavy-Duty HDRM
Redundant Circuit
12,500 lb Release Preload
Mechanical Release for use in place of Refurbishment Initiator, 069-401
069-401
Mechanical Release for use in place of Refurbishment Initiator
Heavy-Duty HDRM, 064-006
064-006
Heavy-Duty HDRM
Redundant Circuit
20,000 lb Release Preload

Medium-Duty Pin Puller

Medium-Duty Pin Puller, 061-018
061-018
Medium-Duty Pin Puller
Non-Redundant Circuit
16 lb Pull Force
Medium-Duty Pin Puller, 061-013
061-013
Medium-Duty Pin Puller
Redundant Circuit
50 lb Initial Pull Force
Medium-Duty Pin Puller, 061-016
061-016
Medium-Duty Pin Puller
Redundant Circuit
115 lb Pull Force

European-Made HDRM Solutions IAW ECSS-E-ST-33-01C Space Mechanism Standard

EU Series: GSS500-000005
GSS500-000005
EU Series
Medium-Duty HDRM
Redundant Circuit
1.5 kN Release Preload
EU Series: GSS500-000016
GSS500-000016
EU Series
Medium-Duty HDRM
Redundant Circuit
3 kN Release Preload
EU Series: GSS500-000006
GSS500-000006
EU Series
Medium-Duty HDRM
Redundant Circuit
6 kN Release Preload
EU Series: GSS500-000001
GSS500-000001
EU Series
Medium-Duty HDRM
Redundant Circuit
11 kN Release Preload
EU Series: GSS500-000008
GSS500-000008
EU Series
Medium-Duty HDRM
Redundant Circuit
12 kN Release Preload
EU Series: GSS500-000003
GSS500-000003
EU Series
Medium-Duty HDRM
Redundant Circuit
18 kN Release Preload
EU Series: GSS500-000011
GSS500-000011
EU Series
Medium-Duty HDRM
Redundant Circuit
24 kN Release Preload