Arms

This RDS (Rotary Drive System) adapter is 12mm long and fits servos equipped with the 5mm-25T ISO micro-size spline. It attaches to our servos (8mm thick ProModeler DS115CLHV) with an M2 machine thread screw. How do you use this thing? Common practice for using these is to glue in a short length of pultruded carbon fiber tubing (using JB Weld steel-filled epoxy), to form the basis of the linkage. From there the limits are your imagination! Note1: micro-25T 5mm spline RDS will not fit 25T...

This precision ProModeler Gear Wheel has 12-teeth and fits all ProModeler servos equipped with a 25T ø6 mm spline shaft - to include sub-micro, micro, mini, and standard-size DL-series, BLS0, and BLS1 servos, plus compatibles from our quality competitors like Futaba, Savox, MKS, et al. Fabricated of 303 stainless steel, this 6.35mm wide (0.250 in) precision-grade gear wheel (20° pressure angle) is both stronger and longer lasting than standard-grade brass gears. The gear begins life as a solid...

Notice: failure to torque the cinch bolt to 1.5N-m may result in inadequate fit This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the standard 25T spline, and threaded in 4X on 5mm centers for M2 linkage hardware. Installation Fitted axially on a nominal 6mm diameter, 25T standard-spline shaft (lightly greased), secure axially with a stainless steel M3x8 bolt torqued to 2.0N-m. Then cinched radially with a stainless...

Notice: failure to torque the cinch bolt to 1.5N-m may result in inadequate fit This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the micro 5M spline, and threaded in 4X on 5mm centers for M2 linkage hardware. Installation Fitted axially on a nominal 5mm diameter, 5M-micro spline shaft (lightly greased), secure axially with a stainless steel M2x4 bolt torqued to 1.5N-m. Then cinched radially with a stainless steel M2...

This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the mega spline (15T ø8mm), and threaded in one place for M3 mounting hardware. Installation is axially on 8mm diameter, 15T-spline shaft (lightly greased), and secured with an M3 Allen-head machine-thread bolt. Disassembly is the reverse, remove securing bolt. Mounting positions (M3 thread) 15mm ...

While this 15T forked horn directly fits a Traxxas SLEDGE, the stock Sledge link needs to use a Traxxas 2742 ball. Swing 16mm from center, this servo control horn is stout and will fit other applications where a dual supported ball link is desired. Install axially on the 15T splined shaft shaft (lightly greased, first), and secured with an M3 Allen-head machine-thread bolt. Then snug up the M2.5 cross bolt. Disassembly is the reverse, remove securing bolt. Note: Reuse stock Sledge...

Fits Traxxas UDR - this ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the mega spline (15T ø8mm), and threaded in two places for M3 mounting hardware on 5mm centers. Installation is axially on 8mm diameter, 15T-spline shaft (lightly greased), and secured with an M3 Allen-head machine-thread bolt. Disassembly is the reverse, remove securing bolt. Mounting positions (M3 thread) 17mm 13mm ...

This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the mega spline (15T ø8mm), and threaded in two places for M3 mounting hardware on 5mm centers. Installation is axially on 8mm diameter, 15T-spline shaft (lightly greased), and secured with an M3 Allen-head machine-thread bolt. Disassembly is the reverse, remove securing bolt. Mounting positions (M3 thread) 14mm 19mm ...

CNC-machined from a solid billet of aircraft aluminum, installation is axially on the output shaft, which we advise first lightly greasing, and then securing with an M3 Allen-head machine-thread bolt. We also advise using a locking device (lock or star washer) or chemical threadlocker. Disassembly is the reverse. - There are 3 standard size ProModeler servos suitable for an X-MAXX  Note; and by way of heads up . . . we advise not using this control horn for servos other than our...

This precision ProModeler Gear Wheel has 20-teeth and fits all ProModeler servos equipped with a 15T ø8 mm spline shaft - to include BLS2 standard-size as well as Quarter-size, plus compatibles from our quality competitors like Futaba, Savox, MKS, et al. Fabricated of 303 stainless steel, this 6.35mm wide (0.250 in) precision-grade gear wheel (20° pressure angle) is both stronger and longer lasting than standard-grade brass gears. The gear begins life as a solid billet of 303 stainless...

This precision ProModeler Gear Wheel has 20-teeth and fits all ProModeler servos equipped with a 25T ø6 mm spline shaft - to include sub-micro, micro, mini, and standard-size DL-series, BLS0, and BLS1 servos, plus compatibles from our quality competitors like Futaba, Savox, MKS, et al. Fabricated of 303 stainless steel, this 6.35mm wide (0.250 in) precision-grade gear wheel (20° pressure angle) is both stronger and longer lasting than standard-grade brass gears. The gear begins life as a solid...

Notice: failure to torque the cinch bolt to 1.5N-m may result in inadequate fit This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the standard 25T spline, and threaded in 6X on 5mm centers for M2 linkage hardware. Installation Fitted axially on a nominal 6mm diameter, 25T standard-spline shaft (lightly greased), secure axially with a stainless steel M3x8 bolt torqued to 2.0N-m. Then cinched radially with a stainless...

This RDS (Rotary Drive System) adapter is 25mm long and fits servos with standard-size 6mm-25T ISO splines like ProModeler (to include sub-micro, micro, mini, and standard sizes) as well as compatible servos, e.g. from Savox, MKS, et al. How do you use this thing? Common practice for using these is to glue in a short length of pultruded carbon fiber tubing (using JB Weld steel-filled epoxy), to form the basis of the linkage. From there the limits are your imagination! Note1; we also offer...

Unlike competitors, we have these servo-mounting screws custom forged right here in the USA. While there are 4 in a pack (enough for one servo), they're also available in quantities of 25, 100, and even 1000 (for professionals builders) because they're useful for a lot of other stuff like mounting cowls, landing gear straps, etc. What motivated us to make these? I was installing servos using a long skinny Phillips head screwdriver. It slipped off and punched a neat hole through the top of the...

This heavy duty ROUND aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the mega spline (15T ø8mm), and threaded in eighteen places for M3 mounting hardware on 30° arcs. Installation is axially on 8mm diameter, 15T-spline shaft (lightly greased), and secured, with M3 Allen-head machine-thread bolt. Disassembly is the reverse, remove securing bolt. Mounting positions (M3 thread) both horns 17mm on 30° arcs 22mm on 30° arcs ...

This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the mega spline (15T ø8mm), and threaded in three places for M3 mounting hardware on 5mm centers. Installation is axially on 8mm diameter, 15T-spline shaft (lightly greased), and secured, then cinched with M3 Allen-head machine-thread bolts. Disassembly is the reverse, loosen cinch bolt, then remove securing bolt. Mounting positions (M3 thread) 15.4mm 20.4mm 25.4mm...

Notice: failure to torque the cinch bolt to 1.5N-m may result in inadequate fit This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the standard 25T spline, and threaded in 3X on 5mm centers for M3 linkage hardware. Installation Fitted axially on a nominal 6mm diameter, 25T-spline shaft (lightly greased), secure axially with a stainless steel M3x6 socket cap (Allen) machine-thread bolt torqued to 2.0N-m. Then cinched...

This heavy duty DOUBLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the standard spline (25T ø6mm), and threaded in six places for M3 mounting hardware on 5mm centers. Installation is axially on 6mm diameter, 25T-spline shaft (lightly greased), and secured, then cinched with M3 Allen-head machine-thread bolts. Disassembly is the reverse, loosen cinch bolts, then remove securing bolt. Mounting positions (M3 thread) both horns 15.4mm...

This heavy duty DOUBLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the standard spline (25T ø6mm), and threaded in six places for M3 mounting hardware on 5mm centers. Installation is axially on 6mm diameter, 25T-spline shaft (lightly greased), and secured, then cinched with M3 Allen-head machine-thread bolts. Disassembly is the reverse, loosen cinch bolts, then remove securing bolt. Mounting positions (M3 thread) both horns 15.4mm...

This ultra duty SINGLE-HORN underslung-mount style aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the mega spline (15T ø8mm), and threaded in three places for M3 mounting hardware (on 5mm centers). This is what you need for a K6S or MT410 with 6.3mm of clearance beneath the horn. Installation is axially on 8mm diameter, 15T-spline shaft (lightly greased), and secured, then cinched with M3 Allen-head machine-thread bolts. Disassembly is the...

Combines a steering-horn rated to 3000oz-in, plus one HVE-rated for throttle. Best servo horn steer/throttle solution made - ideal for the biggest and baddest hydros. Included are: PDRS25-25T Ultraduty-25 servo horn (3000oz-in)PDRS105 HVE-rated throttle horn (High Vibration Environment) This is everything needed to harness a record breaking heavyweight hydro at +100mph. In brief, this ultraduty25 horn is rated to 3000 ounce-inches (making it ideal for stump pulling duty). Meanwhile, the...

M3 star washers, pack 10 - useful for added security against vibration with any M3 fastener (doesn't include the servo-screw depicted in the photo).

Notice: failure to torque the cinch bolt to 1.5N-m may result in inadequate fit This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the standard 25T spline, and threaded 5X on 5mm centers for M2 linkage hardware. Installation Fitted axially on a nominal 6mm diameter, 25T-spline shaft (lightly greased), secure axially with a stainless steel M3x6 socket cap (Allen) machine-thread bolt torqued to 2.0N-m. Then cinched...

NOTE: this servo arm fits our DS115CLHV wing servo, which has a 5mm spline instead of the usual 6mm diameter 25T Futaba compatible spline (as used by most of our servos except the big ass 1/5th class servos, which use our even larger 8mm spline). The spline pattern for this arm is tiny so unless you want the hassle of a return to contend with, don't buy them . . . capice? This polished aluminum servo arm is red anodized and laser etched after being CNC-machined from a solid billet of 6061 T6...

This heavy duty pulley is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the ISO25 spline (25T ø6mm). Installation is axially on the 8mm diameter, 25T-spline shaft (lightly greased), and secured, with M3 Allen-head machine-thread bolt. Disassembly is the reverse, begin by removing the M3 bolt securing the leader cable to the pulley, then the M3 bolt securing the pulley to the splined output shaft. What secures the cable from slipping is the figure of 8 made by the...

Notice: failure to torque the cinch bolt to 1.5N-m may result in inadequate fit This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the standard 15T spline, and threaded 5X on 5mm centers for M3 linkage hardware. Installation Fitted axially on a nominal 6mm diameter, 15T-spline shaft (lightly greased), secure axially with a stainless steel M3x6 socket cap (Allen) machine-thread bolt torqued to 2.0N-m. Then cinched...

Notice: failure to torque the cinch bolt to 1.5N-m may result in inadequate fit This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the standard 25T spline, and threaded 5X on 5mm centers for M3 linkage hardware. Installation Fitted axially on a nominal 6mm diameter, 25T-spline shaft (lightly greased), secure axially with a stainless steel M3x6 socket cap (Allen) machine-thread bolt torqued to 2.0N-m. Then cinched...

Notice: failure to torque the cinch bolt to 2.2N-m may result in inadequate fit This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the 15T mega spline, and threaded in six places on 5mm centers for M3 hardware. Installation is axially on a nominal 8mm diameter, 15T-spline shaft (lightly greased), secured axially with M3 bolt torqued to 1.5N-m then cinched radially with stainless steel M3 Allen-head machine-thread bolt...

This ultra duty DOUBLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the mega spline (15T ø8mm), and threaded in twelve places for M3 mounting hardware on 5mm centers. Installation is axially on 8mm diameter, 15T-spline shaft (lightly greased), and secured, then cinched with M3 Allen-head machine-thread bolts. Disassembly is the reverse, loosen cinch bolts, then remove securing bolt. Mounting positions (M3 thread) both horns 15.4mm...

Notice: to snug the M3 bolt for the splines, use vise grips to tighten before securing the Allen head boltThis heavy duty DOUBLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the standard spline (25T ø6mm), and threaded in twelve places for M3 mounting hardware on 5mm centers. Installation is axially on 6mm diameter, 25T-spline shaft (lightly greased), and secured, then cinched with M3 Allen-head machine-thread bolts. Disassembly is the...

Notice: failure to torque the cinch bolt to 1.5N-m may result in inadequate fit This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the standard 25T spline, and threaded 6X on 5mm centers for M3 linkage hardware. Installation Fitted axially on a nominal 6mm diameter, 25T-spline shaft (lightly greased), secure axially with a stainless steel M3x6 socket cap (Allen) machine-thread bolt torqued to 2.0N-m. Then cinched...

This heavy duty pulley is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the ISO15 spline (15T ø8mm). Installation is axially on the 8mm diameter, 15T-spline shaft (lightly greased), and secured, with M3 Allen-head machine-thread bolt. Disassembly is the reverse, begin by removing the M3 bolt securing the leader cable to the pulley, then the M3 bolt securing the pulley to the splined output shaft. What secures the cable from slipping is the figure of 8 made by the...

This heavy duty pulley is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the ISO25 spline (25T ø6mm). Installation is axially on the 6mm diameter, 25T-spline shaft (lightly greased), and secured, with M3 Allen-head machine-thread bolt. Disassembly is the reverse, begin by removing the M3 bolt securing the leader cable to the pulley, then the M3 bolt securing the pulley to the splined output shaft. What secures the cable from slipping is the figure of 8 made by the...

Notice: failure to torque the cinch bolt to 1.5N-m may result in inadequate fit This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the standard 15T spline, and threaded 7X on 5mm centers for M3 linkage hardware. Installation Fitted axially on a nominal 8mm diameter, 15T-spline shaft (lightly greased), secure axially with a stainless steel M3x6 socket cap (Allen) machine-thread bolt torqued to 2.0N-m. Then cinched...

Notice: failure to torque the cinch bolt to 1.5N-m may result in inadequate fit This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the standard 25T spline, and threaded 7X on 5mm centers for M3 linkage hardware. Installation Fitted axially on a nominal 6mm diameter, 25T-spline shaft (lightly greased), secure axially with a stainless steel M3x6 socket cap (Allen) machine-thread bolt torqued to 2.0N-m. Then cinched...

M3x5.5mm Button Head Allen bolt - click the pull down menu for quantities of 1, 5, 25, 100, or 1000. These are used with type servo horns like PDRS101. There is a blue patch of thread locker pre-applied for your convenience.

M3x5.5mm Phillips Head bolt - click the pull down menu for quantities of 1, 5, 25, 100, or 1000. These are used with type servo horns like PDRS101 when Phillips Head is preferred to Allen Head.

Notice: failure to torque the cinch bolt to 2.2N-m may result in inadequate fit This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the 15T mega spline, and threaded in eight places on 5mm centers for M3 hardware. Installation is axially on a nominal 8mm diameter, 15T-spline shaft (lightly greased), secured axially with M3 bolt torqued to 1.5N-m then cinched radially with stainless steel M3 Allen-head machine-thread bolt...

Notice: failure to torque the cinch bolt to 2.2N-m may result in inadequate fit This ultra duty SINGLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the standard 25T spline, and threaded in eight places on 5mm centers for M3 hardware. Installation is axially on a nominal 6mm diameter, 25T-spline shaft (lightly greased), secured axially with M3 bolt torqued to 1.5N-m then cinched radially with stainless steel M3 Allen-head machine-thread...

Notice: to snug the M3 bolt for the splines, use vise grips to tighten before securing the Allen head boltThis ultra duty DOUBLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the mega spline (15T ø8mm), and threaded in sixteen places for M3 mounting hardware on 5mm centers. Installation is axially on 8mm diameter, 15T-spline shaft (lightly greased), and secured, then cinched with M3 Allen-head machine-thread bolts. Disassembly is the...

Notice: to snug the M3 bolt for the splines, use vise grips to tighten before securing the Allen head bolt This heavy duty DOUBLE-HORN aluminum servo arm is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the standard spline (25T ø6mm), and threaded in sixteen places for M3 mounting hardware on 5mm centers. Installation is axially on 6mm diameter, 25T-spline shaft (lightly greased), and secured, then cinched with M3 Allen-head machine-thread bolts. Disassembly is...

M3x6mm Phillips Head Allen bolt - click the pull down menu for quantities of 1, 5, 25, 100, or 1000. These are used with type servo horns like PDRS101 when Phillips Head is preferred to Allen Head.

M3x8mm Button Head Allen bolt - click the pull down menu for quantities of 1, 5, 25, 100, or 1000. These are used with type servo horns like PDRS101 when something longer than the stock 5.5 is desired. There is a blue patch of thread locker pre-applied for your convenience.

This heavy duty pulley is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the ISO15 spline (15T ø8mm). Installation is axially on the 8mm diameter, 15T-spline shaft (lightly greased), and secured, with M3 Allen-head machine-thread bolt. Disassembly is the reverse, begin by removing the M3 bolt securing the leader cable to the pulley, then the M3 bolt securing the pulley to the splined output shaft. What secures the cable fomr slipping is the figure of 8 made by the...

This heavy duty pulley is CNC-machined from a solid billet of 7075-T6 aircraft aluminum, broached for the ISO25 spline (25T ø6mm). Installation is axially on the 6mm diameter, 25T-spline shaft (lightly greased), and secured, with M3 Allen-head machine-thread bolt. Disassembly is the reverse, begin by removing the M3 bolt securing the leader cable to the pulley, then the M3 bolt securing the pulley to the splined output shaft. What secures the cable from slipping is the figure of 8 made by the...

Made of heavy duty plastic (technically a fiber-filler engineering polymer like is found in 9mm handgun frames), this tough servo horn is suitable up to 630oz-in. Dimensions: ø6mm, 25-spline (Futaba-compatible) 1st bore: 12mm2nd bore: 15mm3rd bore: 18mm4th bore: 21mm5th bore: 24mmNote; you have to decide on quantity before you add them to your shopping cart, so if you select quantity 5, and then within the shopping cart notice it only says qty 1 and change it there to quantity 5, then what...

Made of heavy duty plastic (technically a fiber-filler engineering polymer like is found in 9mm handgun frames), this tough double-arm servo horn is suitable up to 400oz-in. Dimensions: ø6mm, 25-spline (Futaba-compatible) 1st bore pair across: 24mm2nd bore pair across: 30mm3rd bore pair across: 37mm4th bore pair across:43mm5th bore pair across: 49mmNote; you have to decide on quantity before you add them to your shopping cart, so if you select quantity 5, and then within the shopping cart...